From 4ffca781693723574e1ca0c80f676cc3901f6056 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:30:25 +0800
Subject: [PATCH 01/18] =?UTF-8?q?=E9=87=8D=E5=91=BD=E5=90=8D=E6=8B=BC?=
 =?UTF-8?q?=E5=86=99=E9=94=99=E8=AF=AF=E7=9A=84uinnt?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java     |  8 ++++----
 src/test/java/LengthTest.java | 22 +++++++++++-----------
 2 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index dbc9d2c..a078920 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -2,9 +2,9 @@ public class Length {
     private final double value;
     private final String unit;
 
-    public Length(double val, String uinnt) {
+    public Length(double val, String unit) {
         this.value = val;
-        this.unit = uinnt;
+        this.unit = unit;
     }
 
     public Length as(String u) {
@@ -20,7 +20,7 @@ public Length as(String u) {
         if (this.unit.equals("yard")) {
             if (u.equals("inch")) {
                 len = new Length(this.value * 36, u);
-            } else if (u.equals("f")){
+            } else if (u.equals("f")) {
                 len = new Length(this.value * 3, u);
             }
         }
@@ -40,7 +40,7 @@ public double getVal() {
         return this.value;
     }
 
-    public String getUinnt() {
+    public String getUnit() {
         return this.unit;
     }
 }
diff --git a/src/test/java/LengthTest.java b/src/test/java/LengthTest.java
index 4cc0cb8..e9c376b 100644
--- a/src/test/java/LengthTest.java
+++ b/src/test/java/LengthTest.java
@@ -9,7 +9,7 @@ public void should_1_inch_equals_1_inch() {
         Length result = new Length(1, "inch").as("inch");
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUinnt(), is("inch"));
+        assertThat(result.getUnit(), is("inch"));
     }
 
     @Test
@@ -17,7 +17,7 @@ public void should_2_feet_equals_2_feet() {
         Length result = new Length(2, "f").as("f");
 
         assertThat(result.getVal(), is(2.0));
-        assertThat(result.getUinnt(), is("f"));
+        assertThat(result.getUnit(), is("f"));
     }
 
     @Test
@@ -25,7 +25,7 @@ public void should_1_yard_equals_1_yard() {
         Length result = new Length(1, "yard").as("yard");
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUinnt(), is("yard"));
+        assertThat(result.getUnit(), is("yard"));
     }
 
     @Test
@@ -33,7 +33,7 @@ public void should_1_foot_equals_12_inches() {
         Length result = new Length(1, "f").as("inch");
 
         assertThat(result.getVal(), is(12.0));
-        assertThat(result.getUinnt(), is("inch"));
+        assertThat(result.getUnit(), is("inch"));
     }
 
     @Test
@@ -41,7 +41,7 @@ public void should_3_foot_equals_1_yard() {
         Length result = new Length(3, "f").as("yard");
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUinnt(), is("yard"));
+        assertThat(result.getUnit(), is("yard"));
     }
 
     @Test
@@ -49,7 +49,7 @@ public void should_1_yard_equals_3_feet() {
         Length result = new Length(1, "yard").as("f");
 
         assertThat(result.getVal(), is(3.0));
-        assertThat(result.getUinnt(), is("f"));
+        assertThat(result.getUnit(), is("f"));
     }
 
     @Test
@@ -57,7 +57,7 @@ public void should_1_yard_equals_36_inches() {
         Length result = new Length(1, "yard").as("inch");
 
         assertThat(result.getVal(), is(36.0));
-        assertThat(result.getUinnt(), is("inch"));
+        assertThat(result.getUnit(), is("inch"));
     }
 
     @Test
@@ -65,7 +65,7 @@ public void should_2_yards_equals_72_inches() {
         Length result = new Length(2, "yard").as("inch");
 
         assertThat(result.getVal(), is(72.0));
-        assertThat(result.getUinnt(), is("inch"));
+        assertThat(result.getUnit(), is("inch"));
     }
 
     @Test
@@ -73,7 +73,7 @@ public void should_12_inches_equals_1_foot() {
         Length result = new Length(12, "inch").as("f");
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUinnt(), is("f"));
+        assertThat(result.getUnit(), is("f"));
     }
 
     @Test
@@ -81,7 +81,7 @@ public void should_36_inches_equals_1_yard() {
         Length result = new Length(36, "inch").as("yard");
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUinnt(), is("yard"));
+        assertThat(result.getUnit(), is("yard"));
     }
 
     @Test
@@ -89,6 +89,6 @@ public void should_18_inches_equals_half_yard() {
         Length result = new Length(18, "inch").as("yard");
 
         assertThat(result.getVal(), is(0.5));
-        assertThat(result.getUinnt(), is("yard"));
+        assertThat(result.getUnit(), is("yard"));
     }
 }

From 75c5a1832f1a4ee63eaf56d8ec7c0dcd0b67c7c9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:32:16 +0800
Subject: [PATCH 02/18] =?UTF-8?q?=E6=8F=90=E5=8F=96=E5=AD=97=E7=AC=A6?=
 =?UTF-8?q?=E4=B8=B2=E5=B8=B8=E9=87=8F?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index a078920..2e80576 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -1,4 +1,7 @@
 public class Length {
+    private static final String YARD = "yard";
+    private static final String FOOT = "f";
+    private static final String INCH = "inch";
     private final double value;
     private final String unit;
 
@@ -9,26 +12,26 @@ public Length(double val, String unit) {
 
     public Length as(String u) {
         Length len = this;
-        if (this.unit.equals("f")) {
-            if (u.equals("yard")) {
+        if (this.unit.equals(Length.FOOT)) {
+            if (u.equals(Length.YARD)) {
                 len = new Length(this.value / 3, u);
-            } else if (u.equals("inch")) {
+            } else if (u.equals(Length.INCH)) {
                 len = new Length(this.value * 12, u);
             }
         }
 
-        if (this.unit.equals("yard")) {
-            if (u.equals("inch")) {
+        if (this.unit.equals(Length.YARD)) {
+            if (u.equals(Length.INCH)) {
                 len = new Length(this.value * 36, u);
-            } else if (u.equals("f")) {
+            } else if (u.equals(Length.FOOT)) {
                 len = new Length(this.value * 3, u);
             }
         }
 
-        if (this.unit.equals("inch")) {
-            if (u.equals("f")) {
+        if (this.unit.equals(Length.INCH)) {
+            if (u.equals(Length.FOOT)) {
                 len = new Length(this.value / 12, u);
-            } else if (u.equals("yard")) {
+            } else if (u.equals(Length.YARD)) {
                 len = new Length(this.value / 36, u);
             }
         }

From ab975401275b03f4229c7521345e4b3cce1189b2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:33:30 +0800
Subject: [PATCH 03/18] =?UTF-8?q?=E6=8F=90=E5=8F=96=E6=B5=8B=E8=AF=95?=
 =?UTF-8?q?=E7=B1=BB=E4=B8=AD=E7=9A=84=E5=AD=97=E7=AC=A6=E4=B8=B2=E5=B8=B8?=
 =?UTF-8?q?=E9=87=8F?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java     |  6 ++---
 src/test/java/LengthTest.java | 44 +++++++++++++++++------------------
 2 files changed, 25 insertions(+), 25 deletions(-)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index 2e80576..7315883 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -1,7 +1,7 @@
 public class Length {
-    private static final String YARD = "yard";
-    private static final String FOOT = "f";
-    private static final String INCH = "inch";
+    static final String YARD = "yard";
+    static final String FOOT = "f";
+    static final String INCH = "inch";
     private final double value;
     private final String unit;
 
diff --git a/src/test/java/LengthTest.java b/src/test/java/LengthTest.java
index e9c376b..dab5452 100644
--- a/src/test/java/LengthTest.java
+++ b/src/test/java/LengthTest.java
@@ -6,89 +6,89 @@
 public class LengthTest {
     @Test
     public void should_1_inch_equals_1_inch() {
-        Length result = new Length(1, "inch").as("inch");
+        Length result = new Length(1, Length.INCH).as(Length.INCH);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUnit(), is("inch"));
+        assertThat(result.getUnit(), is(Length.INCH));
     }
 
     @Test
     public void should_2_feet_equals_2_feet() {
-        Length result = new Length(2, "f").as("f");
+        Length result = new Length(2, Length.FOOT).as(Length.FOOT);
 
         assertThat(result.getVal(), is(2.0));
-        assertThat(result.getUnit(), is("f"));
+        assertThat(result.getUnit(), is(Length.FOOT));
     }
 
     @Test
     public void should_1_yard_equals_1_yard() {
-        Length result = new Length(1, "yard").as("yard");
+        Length result = new Length(1, Length.YARD).as(Length.YARD);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUnit(), is("yard"));
+        assertThat(result.getUnit(), is(Length.YARD));
     }
 
     @Test
     public void should_1_foot_equals_12_inches() {
-        Length result = new Length(1, "f").as("inch");
+        Length result = new Length(1, Length.FOOT).as(Length.INCH);
 
         assertThat(result.getVal(), is(12.0));
-        assertThat(result.getUnit(), is("inch"));
+        assertThat(result.getUnit(), is(Length.INCH));
     }
 
     @Test
     public void should_3_foot_equals_1_yard() {
-        Length result = new Length(3, "f").as("yard");
+        Length result = new Length(3, Length.FOOT).as(Length.YARD);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUnit(), is("yard"));
+        assertThat(result.getUnit(), is(Length.YARD));
     }
 
     @Test
     public void should_1_yard_equals_3_feet() {
-        Length result = new Length(1, "yard").as("f");
+        Length result = new Length(1, Length.YARD).as(Length.FOOT);
 
         assertThat(result.getVal(), is(3.0));
-        assertThat(result.getUnit(), is("f"));
+        assertThat(result.getUnit(), is(Length.FOOT));
     }
 
     @Test
     public void should_1_yard_equals_36_inches() {
-        Length result = new Length(1, "yard").as("inch");
+        Length result = new Length(1, Length.YARD).as(Length.INCH);
 
         assertThat(result.getVal(), is(36.0));
-        assertThat(result.getUnit(), is("inch"));
+        assertThat(result.getUnit(), is(Length.INCH));
     }
 
     @Test
     public void should_2_yards_equals_72_inches() {
-        Length result = new Length(2, "yard").as("inch");
+        Length result = new Length(2, Length.YARD).as(Length.INCH);
 
         assertThat(result.getVal(), is(72.0));
-        assertThat(result.getUnit(), is("inch"));
+        assertThat(result.getUnit(), is(Length.INCH));
     }
 
     @Test
     public void should_12_inches_equals_1_foot() {
-        Length result = new Length(12, "inch").as("f");
+        Length result = new Length(12, Length.INCH).as(Length.FOOT);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUnit(), is("f"));
+        assertThat(result.getUnit(), is(Length.FOOT));
     }
 
     @Test
     public void should_36_inches_equals_1_yard() {
-        Length result = new Length(36, "inch").as("yard");
+        Length result = new Length(36, Length.INCH).as(Length.YARD);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUnit(), is("yard"));
+        assertThat(result.getUnit(), is(Length.YARD));
     }
 
     @Test
     public void should_18_inches_equals_half_yard() {
-        Length result = new Length(18, "inch").as("yard");
+        Length result = new Length(18, Length.INCH).as(Length.YARD);
 
         assertThat(result.getVal(), is(0.5));
-        assertThat(result.getUnit(), is("yard"));
+        assertThat(result.getUnit(), is(Length.YARD));
     }
 }

From ae9867f9324e1dcb5389ff864ff81d5938d3617d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:34:56 +0800
Subject: [PATCH 04/18] =?UTF-8?q?=E5=A4=8D=E5=88=B6as=E6=96=B9=E6=B3=95?=
 =?UTF-8?q?=E4=B8=BAtemp=5Fas,=E5=B9=B6=E5=B0=86as=E5=AE=9E=E7=8E=B0?=
 =?UTF-8?q?=E6=94=B9=E4=B8=BA=E7=9B=B4=E6=8E=A5=E8=BF=94=E5=9B=9Etemp=5Fas?=
 =?UTF-8?q?=E8=B0=83=E7=94=A8=E7=BB=93=E6=9E=9C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index 7315883..98c0f73 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -10,29 +10,33 @@ public Length(double val, String unit) {
         this.unit = unit;
     }
 
-    public Length as(String u) {
+    public Length as(String targetUnit) {
+        return temp_as(targetUnit);
+    }
+
+    public Length temp_as(String targetUnit) {
         Length len = this;
         if (this.unit.equals(Length.FOOT)) {
-            if (u.equals(Length.YARD)) {
-                len = new Length(this.value / 3, u);
-            } else if (u.equals(Length.INCH)) {
-                len = new Length(this.value * 12, u);
+            if (targetUnit.equals(Length.YARD)) {
+                len = new Length(this.value / 3, targetUnit);
+            } else if (targetUnit.equals(Length.INCH)) {
+                len = new Length(this.value * 12, targetUnit);
             }
         }
 
         if (this.unit.equals(Length.YARD)) {
-            if (u.equals(Length.INCH)) {
-                len = new Length(this.value * 36, u);
-            } else if (u.equals(Length.FOOT)) {
-                len = new Length(this.value * 3, u);
+            if (targetUnit.equals(Length.INCH)) {
+                len = new Length(this.value * 36, targetUnit);
+            } else if (targetUnit.equals(Length.FOOT)) {
+                len = new Length(this.value * 3, targetUnit);
             }
         }
 
         if (this.unit.equals(Length.INCH)) {
-            if (u.equals(Length.FOOT)) {
-                len = new Length(this.value / 12, u);
-            } else if (u.equals(Length.YARD)) {
-                len = new Length(this.value / 36, u);
+            if (targetUnit.equals(Length.FOOT)) {
+                len = new Length(this.value / 12, targetUnit);
+            } else if (targetUnit.equals(Length.YARD)) {
+                len = new Length(this.value / 36, targetUnit);
             }
         }
 

From 8098271f73ef27329e5848586c69ac61be556c20 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:36:18 +0800
Subject: [PATCH 05/18] =?UTF-8?q?=E5=88=9B=E5=BB=BAUnit=E6=9E=9A=E4=B8=BE?=
 =?UTF-8?q?=E7=B1=BB=E5=9E=8B=EF=BC=8C=E4=BD=9C=E4=B8=BAtemp=5Fas=E4=BC=A0?=
 =?UTF-8?q?=E5=85=A5=E5=8F=82=E6=95=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java | 4 ++--
 src/main/java/Unit.java   | 8 ++++++++
 2 files changed, 10 insertions(+), 2 deletions(-)
 create mode 100644 src/main/java/Unit.java

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index 98c0f73..b38ee56 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -11,10 +11,10 @@ public Length(double val, String unit) {
     }
 
     public Length as(String targetUnit) {
-        return temp_as(targetUnit);
+        return temp_as(targetUnit, null);
     }
 
-    public Length temp_as(String targetUnit) {
+    public Length temp_as(String targetUnit, Unit tempUnit) {
         Length len = this;
         if (this.unit.equals(Length.FOOT)) {
             if (targetUnit.equals(Length.YARD)) {
diff --git a/src/main/java/Unit.java b/src/main/java/Unit.java
new file mode 100644
index 0000000..db25879
--- /dev/null
+++ b/src/main/java/Unit.java
@@ -0,0 +1,8 @@
+/**
+ * Created with IntelliJ IDEA.
+ * User: lai.yi
+ * Date: 2020/2/1
+ * Description:
+ **/
+public enum Unit {
+}

From 27deb25bb0d36c92be3bb31f1de9a36173fade19 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:44:05 +0800
Subject: [PATCH 06/18] =?UTF-8?q?=E5=B0=86=E6=B5=8B=E8=AF=95=E4=B8=AD?=
 =?UTF-8?q?=E8=B0=83=E7=94=A8as=E6=96=B9=E6=B3=95=E6=9B=BF=E6=8D=A2?=
 =?UTF-8?q?=E4=B8=BAtemp=5Fas?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java     | 22 +++++++++++++++-------
 src/main/java/Unit.java       |  1 +
 src/test/java/LengthTest.java | 22 +++++++++++-----------
 3 files changed, 27 insertions(+), 18 deletions(-)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index b38ee56..077be0f 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -11,31 +11,39 @@ public Length(double val, String unit) {
     }
 
     public Length as(String targetUnit) {
-        return temp_as(targetUnit, null);
+        Unit tempUnit = null;
+        if (targetUnit.equals(Length.YARD)) {
+            tempUnit = Unit.YARD;
+        } else if (targetUnit.equals(Length.FOOT)) {
+            tempUnit = Unit.FOOT;
+        } else if (targetUnit.equals(Length.INCH)) {
+            tempUnit = Unit.INCH;
+        }
+        return temp_as(targetUnit, tempUnit);
     }
 
     public Length temp_as(String targetUnit, Unit tempUnit) {
         Length len = this;
         if (this.unit.equals(Length.FOOT)) {
-            if (targetUnit.equals(Length.YARD)) {
+            if (tempUnit == Unit.YARD) {
                 len = new Length(this.value / 3, targetUnit);
-            } else if (targetUnit.equals(Length.INCH)) {
+            } else if (tempUnit == Unit.INCH) {
                 len = new Length(this.value * 12, targetUnit);
             }
         }
 
         if (this.unit.equals(Length.YARD)) {
-            if (targetUnit.equals(Length.INCH)) {
+            if (tempUnit == Unit.INCH) {
                 len = new Length(this.value * 36, targetUnit);
-            } else if (targetUnit.equals(Length.FOOT)) {
+            } else if (tempUnit == Unit.FOOT) {
                 len = new Length(this.value * 3, targetUnit);
             }
         }
 
         if (this.unit.equals(Length.INCH)) {
-            if (targetUnit.equals(Length.FOOT)) {
+            if (tempUnit == Unit.FOOT) {
                 len = new Length(this.value / 12, targetUnit);
-            } else if (targetUnit.equals(Length.YARD)) {
+            } else if (tempUnit == Unit.YARD) {
                 len = new Length(this.value / 36, targetUnit);
             }
         }
diff --git a/src/main/java/Unit.java b/src/main/java/Unit.java
index db25879..5726bc4 100644
--- a/src/main/java/Unit.java
+++ b/src/main/java/Unit.java
@@ -5,4 +5,5 @@
  * Description:
  **/
 public enum Unit {
+    FOOT, INCH, YARD
 }
diff --git a/src/test/java/LengthTest.java b/src/test/java/LengthTest.java
index dab5452..27c7ac2 100644
--- a/src/test/java/LengthTest.java
+++ b/src/test/java/LengthTest.java
@@ -6,7 +6,7 @@
 public class LengthTest {
     @Test
     public void should_1_inch_equals_1_inch() {
-        Length result = new Length(1, Length.INCH).as(Length.INCH);
+        Length result = new Length(1, Length.INCH).temp_as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.INCH));
@@ -14,7 +14,7 @@ public void should_1_inch_equals_1_inch() {
 
     @Test
     public void should_2_feet_equals_2_feet() {
-        Length result = new Length(2, Length.FOOT).as(Length.FOOT);
+        Length result = new Length(2, Length.FOOT).temp_as(Length.FOOT, Unit.FOOT);
 
         assertThat(result.getVal(), is(2.0));
         assertThat(result.getUnit(), is(Length.FOOT));
@@ -22,7 +22,7 @@ public void should_2_feet_equals_2_feet() {
 
     @Test
     public void should_1_yard_equals_1_yard() {
-        Length result = new Length(1, Length.YARD).as(Length.YARD);
+        Length result = new Length(1, Length.YARD).temp_as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.YARD));
@@ -30,7 +30,7 @@ public void should_1_yard_equals_1_yard() {
 
     @Test
     public void should_1_foot_equals_12_inches() {
-        Length result = new Length(1, Length.FOOT).as(Length.INCH);
+        Length result = new Length(1, Length.FOOT).temp_as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(12.0));
         assertThat(result.getUnit(), is(Length.INCH));
@@ -38,7 +38,7 @@ public void should_1_foot_equals_12_inches() {
 
     @Test
     public void should_3_foot_equals_1_yard() {
-        Length result = new Length(3, Length.FOOT).as(Length.YARD);
+        Length result = new Length(3, Length.FOOT).temp_as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.YARD));
@@ -46,7 +46,7 @@ public void should_3_foot_equals_1_yard() {
 
     @Test
     public void should_1_yard_equals_3_feet() {
-        Length result = new Length(1, Length.YARD).as(Length.FOOT);
+        Length result = new Length(1, Length.YARD).temp_as(Length.FOOT, Unit.FOOT);
 
         assertThat(result.getVal(), is(3.0));
         assertThat(result.getUnit(), is(Length.FOOT));
@@ -54,7 +54,7 @@ public void should_1_yard_equals_3_feet() {
 
     @Test
     public void should_1_yard_equals_36_inches() {
-        Length result = new Length(1, Length.YARD).as(Length.INCH);
+        Length result = new Length(1, Length.YARD).temp_as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(36.0));
         assertThat(result.getUnit(), is(Length.INCH));
@@ -62,7 +62,7 @@ public void should_1_yard_equals_36_inches() {
 
     @Test
     public void should_2_yards_equals_72_inches() {
-        Length result = new Length(2, Length.YARD).as(Length.INCH);
+        Length result = new Length(2, Length.YARD).temp_as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(72.0));
         assertThat(result.getUnit(), is(Length.INCH));
@@ -70,7 +70,7 @@ public void should_2_yards_equals_72_inches() {
 
     @Test
     public void should_12_inches_equals_1_foot() {
-        Length result = new Length(12, Length.INCH).as(Length.FOOT);
+        Length result = new Length(12, Length.INCH).temp_as(Length.FOOT, Unit.FOOT);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.FOOT));
@@ -78,7 +78,7 @@ public void should_12_inches_equals_1_foot() {
 
     @Test
     public void should_36_inches_equals_1_yard() {
-        Length result = new Length(36, Length.INCH).as(Length.YARD);
+        Length result = new Length(36, Length.INCH).temp_as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.YARD));
@@ -86,7 +86,7 @@ public void should_36_inches_equals_1_yard() {
 
     @Test
     public void should_18_inches_equals_half_yard() {
-        Length result = new Length(18, Length.INCH).as(Length.YARD);
+        Length result = new Length(18, Length.INCH).temp_as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(0.5));
         assertThat(result.getUnit(), is(Length.YARD));

From f39b80a92cee5544ee42deeb17b365b6ce8754ed Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:44:47 +0800
Subject: [PATCH 07/18] =?UTF-8?q?=E5=8E=BB=E6=8E=89=E5=8E=9F=E6=9D=A5as?=
 =?UTF-8?q?=E6=96=B9=E6=B3=95=EF=BC=8C=E5=B9=B6=E9=87=8D=E5=91=BD=E5=90=8D?=
 =?UTF-8?q?temp=5Fas=E4=B8=BAas?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java     | 14 +-------------
 src/test/java/LengthTest.java | 22 +++++++++++-----------
 2 files changed, 12 insertions(+), 24 deletions(-)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index 077be0f..ff6073b 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -10,19 +10,7 @@ public Length(double val, String unit) {
         this.unit = unit;
     }
 
-    public Length as(String targetUnit) {
-        Unit tempUnit = null;
-        if (targetUnit.equals(Length.YARD)) {
-            tempUnit = Unit.YARD;
-        } else if (targetUnit.equals(Length.FOOT)) {
-            tempUnit = Unit.FOOT;
-        } else if (targetUnit.equals(Length.INCH)) {
-            tempUnit = Unit.INCH;
-        }
-        return temp_as(targetUnit, tempUnit);
-    }
-
-    public Length temp_as(String targetUnit, Unit tempUnit) {
+    public Length as(String targetUnit, Unit tempUnit) {
         Length len = this;
         if (this.unit.equals(Length.FOOT)) {
             if (tempUnit == Unit.YARD) {
diff --git a/src/test/java/LengthTest.java b/src/test/java/LengthTest.java
index 27c7ac2..a15b900 100644
--- a/src/test/java/LengthTest.java
+++ b/src/test/java/LengthTest.java
@@ -6,7 +6,7 @@
 public class LengthTest {
     @Test
     public void should_1_inch_equals_1_inch() {
-        Length result = new Length(1, Length.INCH).temp_as(Length.INCH, Unit.INCH);
+        Length result = new Length(1, Length.INCH).as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.INCH));
@@ -14,7 +14,7 @@ public void should_1_inch_equals_1_inch() {
 
     @Test
     public void should_2_feet_equals_2_feet() {
-        Length result = new Length(2, Length.FOOT).temp_as(Length.FOOT, Unit.FOOT);
+        Length result = new Length(2, Length.FOOT).as(Length.FOOT, Unit.FOOT);
 
         assertThat(result.getVal(), is(2.0));
         assertThat(result.getUnit(), is(Length.FOOT));
@@ -22,7 +22,7 @@ public void should_2_feet_equals_2_feet() {
 
     @Test
     public void should_1_yard_equals_1_yard() {
-        Length result = new Length(1, Length.YARD).temp_as(Length.YARD, Unit.YARD);
+        Length result = new Length(1, Length.YARD).as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.YARD));
@@ -30,7 +30,7 @@ public void should_1_yard_equals_1_yard() {
 
     @Test
     public void should_1_foot_equals_12_inches() {
-        Length result = new Length(1, Length.FOOT).temp_as(Length.INCH, Unit.INCH);
+        Length result = new Length(1, Length.FOOT).as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(12.0));
         assertThat(result.getUnit(), is(Length.INCH));
@@ -38,7 +38,7 @@ public void should_1_foot_equals_12_inches() {
 
     @Test
     public void should_3_foot_equals_1_yard() {
-        Length result = new Length(3, Length.FOOT).temp_as(Length.YARD, Unit.YARD);
+        Length result = new Length(3, Length.FOOT).as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.YARD));
@@ -46,7 +46,7 @@ public void should_3_foot_equals_1_yard() {
 
     @Test
     public void should_1_yard_equals_3_feet() {
-        Length result = new Length(1, Length.YARD).temp_as(Length.FOOT, Unit.FOOT);
+        Length result = new Length(1, Length.YARD).as(Length.FOOT, Unit.FOOT);
 
         assertThat(result.getVal(), is(3.0));
         assertThat(result.getUnit(), is(Length.FOOT));
@@ -54,7 +54,7 @@ public void should_1_yard_equals_3_feet() {
 
     @Test
     public void should_1_yard_equals_36_inches() {
-        Length result = new Length(1, Length.YARD).temp_as(Length.INCH, Unit.INCH);
+        Length result = new Length(1, Length.YARD).as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(36.0));
         assertThat(result.getUnit(), is(Length.INCH));
@@ -62,7 +62,7 @@ public void should_1_yard_equals_36_inches() {
 
     @Test
     public void should_2_yards_equals_72_inches() {
-        Length result = new Length(2, Length.YARD).temp_as(Length.INCH, Unit.INCH);
+        Length result = new Length(2, Length.YARD).as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(72.0));
         assertThat(result.getUnit(), is(Length.INCH));
@@ -70,7 +70,7 @@ public void should_2_yards_equals_72_inches() {
 
     @Test
     public void should_12_inches_equals_1_foot() {
-        Length result = new Length(12, Length.INCH).temp_as(Length.FOOT, Unit.FOOT);
+        Length result = new Length(12, Length.INCH).as(Length.FOOT, Unit.FOOT);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.FOOT));
@@ -78,7 +78,7 @@ public void should_12_inches_equals_1_foot() {
 
     @Test
     public void should_36_inches_equals_1_yard() {
-        Length result = new Length(36, Length.INCH).temp_as(Length.YARD, Unit.YARD);
+        Length result = new Length(36, Length.INCH).as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.YARD));
@@ -86,7 +86,7 @@ public void should_36_inches_equals_1_yard() {
 
     @Test
     public void should_18_inches_equals_half_yard() {
-        Length result = new Length(18, Length.INCH).temp_as(Length.YARD, Unit.YARD);
+        Length result = new Length(18, Length.INCH).as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(0.5));
         assertThat(result.getUnit(), is(Length.YARD));

From 45dbad9ce68f437802d00337ade2838bf221f929 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:50:40 +0800
Subject: [PATCH 08/18] =?UTF-8?q?=E5=9C=A8length=E4=B8=AD=E6=B7=BB?=
 =?UTF-8?q?=E5=8A=A0tempUnit=E5=AD=97=E6=AE=B5?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index ff6073b..2391afe 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -4,10 +4,12 @@ public class Length {
     static final String INCH = "inch";
     private final double value;
     private final String unit;
+    private final Unit tempUnit;
 
     public Length(double val, String unit) {
         this.value = val;
         this.unit = unit;
+        this.tempUnit = null;
     }
 
     public Length as(String targetUnit, Unit tempUnit) {

From ea2f7809e4a45dc4eb2c7cfb8c50c31bedd6597c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:51:38 +0800
Subject: [PATCH 09/18] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E6=9C=89tempUnit?=
 =?UTF-8?q?=E5=88=9D=E5=A7=8B=E5=8C=96=E7=9A=84=E6=9E=84=E9=80=A0=E5=87=BD?=
 =?UTF-8?q?=E6=95=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index 2391afe..509e737 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -12,6 +12,12 @@ public Length(double val, String unit) {
         this.tempUnit = null;
     }
 
+    public Length(double val, String unit, Unit tempUnit) {
+        this.value = val;
+        this.unit = unit;
+        this.tempUnit = tempUnit;
+    }
+
     public Length as(String targetUnit, Unit tempUnit) {
         Length len = this;
         if (this.unit.equals(Length.FOOT)) {

From d4679d5771e6ad590131d3ded4362cb596f4bc9d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:52:50 +0800
Subject: [PATCH 10/18] =?UTF-8?q?=E5=B0=86as=E6=96=B9=E6=B3=95=E4=B8=AD?=
 =?UTF-8?q?=E6=9E=84=E9=80=A0Length=E7=9A=84=E6=9E=84=E9=80=A0=E5=99=A8?=
 =?UTF-8?q?=E6=9B=BF=E6=8D=A2=E4=B8=BA=E5=B8=A6tempUnit=E7=89=88=E6=9C=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index 509e737..b952f11 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -22,25 +22,25 @@ public Length as(String targetUnit, Unit tempUnit) {
         Length len = this;
         if (this.unit.equals(Length.FOOT)) {
             if (tempUnit == Unit.YARD) {
-                len = new Length(this.value / 3, targetUnit);
+                len = new Length(this.value / 3, targetUnit, tempUnit);
             } else if (tempUnit == Unit.INCH) {
-                len = new Length(this.value * 12, targetUnit);
+                len = new Length(this.value * 12, targetUnit, tempUnit);
             }
         }
 
         if (this.unit.equals(Length.YARD)) {
             if (tempUnit == Unit.INCH) {
-                len = new Length(this.value * 36, targetUnit);
+                len = new Length(this.value * 36, targetUnit, tempUnit);
             } else if (tempUnit == Unit.FOOT) {
-                len = new Length(this.value * 3, targetUnit);
+                len = new Length(this.value * 3, targetUnit, tempUnit);
             }
         }
 
         if (this.unit.equals(Length.INCH)) {
             if (tempUnit == Unit.FOOT) {
-                len = new Length(this.value / 12, targetUnit);
+                len = new Length(this.value / 12, targetUnit, tempUnit);
             } else if (tempUnit == Unit.YARD) {
-                len = new Length(this.value / 36, targetUnit);
+                len = new Length(this.value / 36, targetUnit, tempUnit);
             }
         }
 

From 13da9a529cde11afc79483ee369a88f3924f0ff1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:53:23 +0800
Subject: [PATCH 11/18] =?UTF-8?q?=E6=B7=BB=E5=8A=A0getTempUnit=E6=96=B9?=
 =?UTF-8?q?=E6=B3=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index b952f11..363dd15 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -54,4 +54,8 @@ public double getVal() {
     public String getUnit() {
         return this.unit;
     }
+
+    public Unit getTempUnit() {
+        return this.tempUnit;
+    }
 }

From 73d9fb6e1911b92200e219e51a872e6a73216a8c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:55:40 +0800
Subject: [PATCH 12/18] =?UTF-8?q?=E5=B0=86=E6=B5=8B=E8=AF=95=E7=B1=BB?=
 =?UTF-8?q?=E4=B8=AD=E6=9E=84=E9=80=A0=E5=87=BD=E6=95=B0=E7=89=88=E6=9C=AC?=
 =?UTF-8?q?=E6=9B=BF=E6=8D=A2=E4=B8=BA=E5=B8=A6tempUnit=E7=89=88=E6=9C=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/test/java/LengthTest.java | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/src/test/java/LengthTest.java b/src/test/java/LengthTest.java
index a15b900..6a59a10 100644
--- a/src/test/java/LengthTest.java
+++ b/src/test/java/LengthTest.java
@@ -6,7 +6,7 @@
 public class LengthTest {
     @Test
     public void should_1_inch_equals_1_inch() {
-        Length result = new Length(1, Length.INCH).as(Length.INCH, Unit.INCH);
+        Length result = new Length(1, Length.INCH, Unit.INCH).as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.INCH));
@@ -14,7 +14,7 @@ public void should_1_inch_equals_1_inch() {
 
     @Test
     public void should_2_feet_equals_2_feet() {
-        Length result = new Length(2, Length.FOOT).as(Length.FOOT, Unit.FOOT);
+        Length result = new Length(2, Length.FOOT, Unit.FOOT).as(Length.FOOT, Unit.FOOT);
 
         assertThat(result.getVal(), is(2.0));
         assertThat(result.getUnit(), is(Length.FOOT));
@@ -22,7 +22,7 @@ public void should_2_feet_equals_2_feet() {
 
     @Test
     public void should_1_yard_equals_1_yard() {
-        Length result = new Length(1, Length.YARD).as(Length.YARD, Unit.YARD);
+        Length result = new Length(1, Length.YARD, Unit.YARD).as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.YARD));
@@ -30,7 +30,7 @@ public void should_1_yard_equals_1_yard() {
 
     @Test
     public void should_1_foot_equals_12_inches() {
-        Length result = new Length(1, Length.FOOT).as(Length.INCH, Unit.INCH);
+        Length result = new Length(1, Length.FOOT, Unit.FOOT).as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(12.0));
         assertThat(result.getUnit(), is(Length.INCH));
@@ -38,7 +38,7 @@ public void should_1_foot_equals_12_inches() {
 
     @Test
     public void should_3_foot_equals_1_yard() {
-        Length result = new Length(3, Length.FOOT).as(Length.YARD, Unit.YARD);
+        Length result = new Length(3, Length.FOOT, Unit.FOOT).as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.YARD));
@@ -46,7 +46,7 @@ public void should_3_foot_equals_1_yard() {
 
     @Test
     public void should_1_yard_equals_3_feet() {
-        Length result = new Length(1, Length.YARD).as(Length.FOOT, Unit.FOOT);
+        Length result = new Length(1, Length.YARD, Unit.YARD).as(Length.FOOT, Unit.FOOT);
 
         assertThat(result.getVal(), is(3.0));
         assertThat(result.getUnit(), is(Length.FOOT));
@@ -54,7 +54,7 @@ public void should_1_yard_equals_3_feet() {
 
     @Test
     public void should_1_yard_equals_36_inches() {
-        Length result = new Length(1, Length.YARD).as(Length.INCH, Unit.INCH);
+        Length result = new Length(1, Length.YARD, Unit.YARD).as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(36.0));
         assertThat(result.getUnit(), is(Length.INCH));
@@ -62,7 +62,7 @@ public void should_1_yard_equals_36_inches() {
 
     @Test
     public void should_2_yards_equals_72_inches() {
-        Length result = new Length(2, Length.YARD).as(Length.INCH, Unit.INCH);
+        Length result = new Length(2, Length.YARD, Unit.YARD).as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(72.0));
         assertThat(result.getUnit(), is(Length.INCH));
@@ -70,7 +70,7 @@ public void should_2_yards_equals_72_inches() {
 
     @Test
     public void should_12_inches_equals_1_foot() {
-        Length result = new Length(12, Length.INCH).as(Length.FOOT, Unit.FOOT);
+        Length result = new Length(12, Length.INCH, Unit.INCH).as(Length.FOOT, Unit.FOOT);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.FOOT));
@@ -78,7 +78,7 @@ public void should_12_inches_equals_1_foot() {
 
     @Test
     public void should_36_inches_equals_1_yard() {
-        Length result = new Length(36, Length.INCH).as(Length.YARD, Unit.YARD);
+        Length result = new Length(36, Length.INCH, Unit.INCH).as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
         assertThat(result.getUnit(), is(Length.YARD));
@@ -86,7 +86,7 @@ public void should_36_inches_equals_1_yard() {
 
     @Test
     public void should_18_inches_equals_half_yard() {
-        Length result = new Length(18, Length.INCH).as(Length.YARD, Unit.YARD);
+        Length result = new Length(18, Length.INCH, Unit.INCH).as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(0.5));
         assertThat(result.getUnit(), is(Length.YARD));

From b8c44185a127c55e9b23ef3932a22738e2c76b72 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:56:03 +0800
Subject: [PATCH 13/18] =?UTF-8?q?=E5=88=A0=E6=8E=89=E5=8E=9F=E6=9C=89?=
 =?UTF-8?q?=E6=9E=84=E9=80=A0=E5=87=BD=E6=95=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index 363dd15..44329a8 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -6,12 +6,6 @@ public class Length {
     private final String unit;
     private final Unit tempUnit;
 
-    public Length(double val, String unit) {
-        this.value = val;
-        this.unit = unit;
-        this.tempUnit = null;
-    }
-
     public Length(double val, String unit, Unit tempUnit) {
         this.value = val;
         this.unit = unit;

From 9d35531c5875338b4b5cad771072258eae585666 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:57:53 +0800
Subject: [PATCH 14/18] =?UTF-8?q?=E5=B0=86=E6=B5=8B=E8=AF=95=E7=B1=BB?=
 =?UTF-8?q?=E4=B8=ADgetUnit=E6=96=B9=E6=B3=95=E6=9B=BF=E6=8D=A2=E4=B8=BAge?=
 =?UTF-8?q?tTempUnit=E6=96=B9=E6=B3=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/test/java/LengthTest.java | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/src/test/java/LengthTest.java b/src/test/java/LengthTest.java
index 6a59a10..0a4f086 100644
--- a/src/test/java/LengthTest.java
+++ b/src/test/java/LengthTest.java
@@ -9,7 +9,7 @@ public void should_1_inch_equals_1_inch() {
         Length result = new Length(1, Length.INCH, Unit.INCH).as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUnit(), is(Length.INCH));
+        assertThat(result.getTempUnit(), is(Unit.INCH));
     }
 
     @Test
@@ -17,7 +17,7 @@ public void should_2_feet_equals_2_feet() {
         Length result = new Length(2, Length.FOOT, Unit.FOOT).as(Length.FOOT, Unit.FOOT);
 
         assertThat(result.getVal(), is(2.0));
-        assertThat(result.getUnit(), is(Length.FOOT));
+        assertThat(result.getTempUnit(), is(Unit.FOOT));
     }
 
     @Test
@@ -25,7 +25,7 @@ public void should_1_yard_equals_1_yard() {
         Length result = new Length(1, Length.YARD, Unit.YARD).as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUnit(), is(Length.YARD));
+        assertThat(result.getTempUnit(), is(Unit.YARD));
     }
 
     @Test
@@ -33,7 +33,7 @@ public void should_1_foot_equals_12_inches() {
         Length result = new Length(1, Length.FOOT, Unit.FOOT).as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(12.0));
-        assertThat(result.getUnit(), is(Length.INCH));
+        assertThat(result.getTempUnit(), is(Unit.INCH));
     }
 
     @Test
@@ -41,7 +41,7 @@ public void should_3_foot_equals_1_yard() {
         Length result = new Length(3, Length.FOOT, Unit.FOOT).as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUnit(), is(Length.YARD));
+        assertThat(result.getTempUnit(), is(Unit.YARD));
     }
 
     @Test
@@ -49,7 +49,7 @@ public void should_1_yard_equals_3_feet() {
         Length result = new Length(1, Length.YARD, Unit.YARD).as(Length.FOOT, Unit.FOOT);
 
         assertThat(result.getVal(), is(3.0));
-        assertThat(result.getUnit(), is(Length.FOOT));
+        assertThat(result.getTempUnit(), is(Unit.FOOT));
     }
 
     @Test
@@ -57,7 +57,7 @@ public void should_1_yard_equals_36_inches() {
         Length result = new Length(1, Length.YARD, Unit.YARD).as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(36.0));
-        assertThat(result.getUnit(), is(Length.INCH));
+        assertThat(result.getTempUnit(), is(Unit.INCH));
     }
 
     @Test
@@ -65,7 +65,7 @@ public void should_2_yards_equals_72_inches() {
         Length result = new Length(2, Length.YARD, Unit.YARD).as(Length.INCH, Unit.INCH);
 
         assertThat(result.getVal(), is(72.0));
-        assertThat(result.getUnit(), is(Length.INCH));
+        assertThat(result.getTempUnit(), is(Unit.INCH));
     }
 
     @Test
@@ -73,7 +73,7 @@ public void should_12_inches_equals_1_foot() {
         Length result = new Length(12, Length.INCH, Unit.INCH).as(Length.FOOT, Unit.FOOT);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUnit(), is(Length.FOOT));
+        assertThat(result.getTempUnit(), is(Unit.FOOT));
     }
 
     @Test
@@ -81,7 +81,7 @@ public void should_36_inches_equals_1_yard() {
         Length result = new Length(36, Length.INCH, Unit.INCH).as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getUnit(), is(Length.YARD));
+        assertThat(result.getTempUnit(), is(Unit.YARD));
     }
 
     @Test
@@ -89,6 +89,6 @@ public void should_18_inches_equals_half_yard() {
         Length result = new Length(18, Length.INCH, Unit.INCH).as(Length.YARD, Unit.YARD);
 
         assertThat(result.getVal(), is(0.5));
-        assertThat(result.getUnit(), is(Length.YARD));
+        assertThat(result.getTempUnit(), is(Unit.YARD));
     }
 }

From 840bb41184d5d5c2ebd63bc7165d8d39ba79b3b2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:58:30 +0800
Subject: [PATCH 15/18] =?UTF-8?q?=E5=8E=BB=E6=8E=89=E5=8E=9F=E6=9C=89getUn?=
 =?UTF-8?q?it=E6=96=B9=E6=B3=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index 44329a8..8c1f37a 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -45,10 +45,6 @@ public double getVal() {
         return this.value;
     }
 
-    public String getUnit() {
-        return this.unit;
-    }
-
     public Unit getTempUnit() {
         return this.tempUnit;
     }

From 882c832b48ccbd0649c65d0252ef2bfcbce7ecb4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 12:59:18 +0800
Subject: [PATCH 16/18] =?UTF-8?q?=E5=B0=86=E5=8E=9F=E6=9C=89=E7=9A=84unit.?=
 =?UTF-8?q?equals=E6=9B=BF=E6=8D=A2=E4=B8=BAtempUnit=3D=3D?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index 8c1f37a..ea6a63c 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -14,7 +14,7 @@ public Length(double val, String unit, Unit tempUnit) {
 
     public Length as(String targetUnit, Unit tempUnit) {
         Length len = this;
-        if (this.unit.equals(Length.FOOT)) {
+        if (this.tempUnit==Unit.FOOT) {
             if (tempUnit == Unit.YARD) {
                 len = new Length(this.value / 3, targetUnit, tempUnit);
             } else if (tempUnit == Unit.INCH) {
@@ -22,7 +22,7 @@ public Length as(String targetUnit, Unit tempUnit) {
             }
         }
 
-        if (this.unit.equals(Length.YARD)) {
+        if (this.tempUnit==Unit.YARD) {
             if (tempUnit == Unit.INCH) {
                 len = new Length(this.value * 36, targetUnit, tempUnit);
             } else if (tempUnit == Unit.FOOT) {
@@ -30,7 +30,7 @@ public Length as(String targetUnit, Unit tempUnit) {
             }
         }
 
-        if (this.unit.equals(Length.INCH)) {
+        if (this.tempUnit==Unit.INCH) {
             if (tempUnit == Unit.FOOT) {
                 len = new Length(this.value / 12, targetUnit, tempUnit);
             } else if (tempUnit == Unit.YARD) {

From c7dd84b0acfbc7c230036541c9392f061441b0d2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 13:00:46 +0800
Subject: [PATCH 17/18] =?UTF-8?q?=E5=8E=BB=E6=8E=89=E5=8E=9F=E6=9C=89?=
 =?UTF-8?q?=E7=9A=84unit=E5=AD=97=E6=AE=B5=EF=BC=8C=E5=B9=B6=E9=87=8D?=
 =?UTF-8?q?=E5=91=BD=E5=90=8DtempUnit=E4=B8=BAunit?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java     | 42 ++++++++++++++++-----------------
 src/test/java/LengthTest.java | 44 +++++++++++++++++------------------
 2 files changed, 42 insertions(+), 44 deletions(-)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index ea6a63c..23e9d47 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -3,38 +3,36 @@ public class Length {
     static final String FOOT = "f";
     static final String INCH = "inch";
     private final double value;
-    private final String unit;
-    private final Unit tempUnit;
+    private final Unit unit;
 
-    public Length(double val, String unit, Unit tempUnit) {
+    public Length(double val, Unit unit) {
         this.value = val;
         this.unit = unit;
-        this.tempUnit = tempUnit;
     }
 
-    public Length as(String targetUnit, Unit tempUnit) {
+    public Length as(Unit unit) {
         Length len = this;
-        if (this.tempUnit==Unit.FOOT) {
-            if (tempUnit == Unit.YARD) {
-                len = new Length(this.value / 3, targetUnit, tempUnit);
-            } else if (tempUnit == Unit.INCH) {
-                len = new Length(this.value * 12, targetUnit, tempUnit);
+        if (this.unit ==Unit.FOOT) {
+            if (unit == Unit.YARD) {
+                len = new Length(this.value / 3, unit);
+            } else if (unit == Unit.INCH) {
+                len = new Length(this.value * 12, unit);
             }
         }
 
-        if (this.tempUnit==Unit.YARD) {
-            if (tempUnit == Unit.INCH) {
-                len = new Length(this.value * 36, targetUnit, tempUnit);
-            } else if (tempUnit == Unit.FOOT) {
-                len = new Length(this.value * 3, targetUnit, tempUnit);
+        if (this.unit ==Unit.YARD) {
+            if (unit == Unit.INCH) {
+                len = new Length(this.value * 36, unit);
+            } else if (unit == Unit.FOOT) {
+                len = new Length(this.value * 3, unit);
             }
         }
 
-        if (this.tempUnit==Unit.INCH) {
-            if (tempUnit == Unit.FOOT) {
-                len = new Length(this.value / 12, targetUnit, tempUnit);
-            } else if (tempUnit == Unit.YARD) {
-                len = new Length(this.value / 36, targetUnit, tempUnit);
+        if (this.unit ==Unit.INCH) {
+            if (unit == Unit.FOOT) {
+                len = new Length(this.value / 12, unit);
+            } else if (unit == Unit.YARD) {
+                len = new Length(this.value / 36, unit);
             }
         }
 
@@ -45,7 +43,7 @@ public double getVal() {
         return this.value;
     }
 
-    public Unit getTempUnit() {
-        return this.tempUnit;
+    public Unit getUnit() {
+        return this.unit;
     }
 }
diff --git a/src/test/java/LengthTest.java b/src/test/java/LengthTest.java
index 0a4f086..271ae5b 100644
--- a/src/test/java/LengthTest.java
+++ b/src/test/java/LengthTest.java
@@ -6,89 +6,89 @@
 public class LengthTest {
     @Test
     public void should_1_inch_equals_1_inch() {
-        Length result = new Length(1, Length.INCH, Unit.INCH).as(Length.INCH, Unit.INCH);
+        Length result = new Length(1, Unit.INCH).as(Unit.INCH);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getTempUnit(), is(Unit.INCH));
+        assertThat(result.getUnit(), is(Unit.INCH));
     }
 
     @Test
     public void should_2_feet_equals_2_feet() {
-        Length result = new Length(2, Length.FOOT, Unit.FOOT).as(Length.FOOT, Unit.FOOT);
+        Length result = new Length(2, Unit.FOOT).as(Unit.FOOT);
 
         assertThat(result.getVal(), is(2.0));
-        assertThat(result.getTempUnit(), is(Unit.FOOT));
+        assertThat(result.getUnit(), is(Unit.FOOT));
     }
 
     @Test
     public void should_1_yard_equals_1_yard() {
-        Length result = new Length(1, Length.YARD, Unit.YARD).as(Length.YARD, Unit.YARD);
+        Length result = new Length(1, Unit.YARD).as(Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getTempUnit(), is(Unit.YARD));
+        assertThat(result.getUnit(), is(Unit.YARD));
     }
 
     @Test
     public void should_1_foot_equals_12_inches() {
-        Length result = new Length(1, Length.FOOT, Unit.FOOT).as(Length.INCH, Unit.INCH);
+        Length result = new Length(1, Unit.FOOT).as(Unit.INCH);
 
         assertThat(result.getVal(), is(12.0));
-        assertThat(result.getTempUnit(), is(Unit.INCH));
+        assertThat(result.getUnit(), is(Unit.INCH));
     }
 
     @Test
     public void should_3_foot_equals_1_yard() {
-        Length result = new Length(3, Length.FOOT, Unit.FOOT).as(Length.YARD, Unit.YARD);
+        Length result = new Length(3, Unit.FOOT).as(Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getTempUnit(), is(Unit.YARD));
+        assertThat(result.getUnit(), is(Unit.YARD));
     }
 
     @Test
     public void should_1_yard_equals_3_feet() {
-        Length result = new Length(1, Length.YARD, Unit.YARD).as(Length.FOOT, Unit.FOOT);
+        Length result = new Length(1, Unit.YARD).as(Unit.FOOT);
 
         assertThat(result.getVal(), is(3.0));
-        assertThat(result.getTempUnit(), is(Unit.FOOT));
+        assertThat(result.getUnit(), is(Unit.FOOT));
     }
 
     @Test
     public void should_1_yard_equals_36_inches() {
-        Length result = new Length(1, Length.YARD, Unit.YARD).as(Length.INCH, Unit.INCH);
+        Length result = new Length(1, Unit.YARD).as(Unit.INCH);
 
         assertThat(result.getVal(), is(36.0));
-        assertThat(result.getTempUnit(), is(Unit.INCH));
+        assertThat(result.getUnit(), is(Unit.INCH));
     }
 
     @Test
     public void should_2_yards_equals_72_inches() {
-        Length result = new Length(2, Length.YARD, Unit.YARD).as(Length.INCH, Unit.INCH);
+        Length result = new Length(2, Unit.YARD).as(Unit.INCH);
 
         assertThat(result.getVal(), is(72.0));
-        assertThat(result.getTempUnit(), is(Unit.INCH));
+        assertThat(result.getUnit(), is(Unit.INCH));
     }
 
     @Test
     public void should_12_inches_equals_1_foot() {
-        Length result = new Length(12, Length.INCH, Unit.INCH).as(Length.FOOT, Unit.FOOT);
+        Length result = new Length(12, Unit.INCH).as(Unit.FOOT);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getTempUnit(), is(Unit.FOOT));
+        assertThat(result.getUnit(), is(Unit.FOOT));
     }
 
     @Test
     public void should_36_inches_equals_1_yard() {
-        Length result = new Length(36, Length.INCH, Unit.INCH).as(Length.YARD, Unit.YARD);
+        Length result = new Length(36, Unit.INCH).as(Unit.YARD);
 
         assertThat(result.getVal(), is(1.0));
-        assertThat(result.getTempUnit(), is(Unit.YARD));
+        assertThat(result.getUnit(), is(Unit.YARD));
     }
 
     @Test
     public void should_18_inches_equals_half_yard() {
-        Length result = new Length(18, Length.INCH, Unit.INCH).as(Length.YARD, Unit.YARD);
+        Length result = new Length(18, Unit.INCH).as(Unit.YARD);
 
         assertThat(result.getVal(), is(0.5));
-        assertThat(result.getTempUnit(), is(Unit.YARD));
+        assertThat(result.getUnit(), is(Unit.YARD));
     }
 }

From bc8e04e0d5a967a42b1f772171e8b9b4f0079673 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A5=E4=B8=80?= <tom.lai19871106@gmail.com>
Date: Sat, 1 Feb 2020 13:01:08 +0800
Subject: [PATCH 18/18] =?UTF-8?q?=E5=8E=BB=E6=8E=89=E5=8E=9F=E6=9C=89?=
 =?UTF-8?q?=E5=AD=97=E7=AC=A6=E4=B8=B2=E5=B8=B8=E9=87=8F?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/Length.java | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/main/java/Length.java b/src/main/java/Length.java
index 23e9d47..deed865 100644
--- a/src/main/java/Length.java
+++ b/src/main/java/Length.java
@@ -1,7 +1,4 @@
 public class Length {
-    static final String YARD = "yard";
-    static final String FOOT = "f";
-    static final String INCH = "inch";
     private final double value;
     private final Unit unit;