diff --git a/README.md b/README.md
index 58bc00b..d3db7ca 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,12 @@
 # Java Basic Training
+
+Tugas:
+
+Simple java: letter-grade, calender, factorial 
+    -Letter-grade : penggunaan IF-ELSE, input angka, output grade
+    -Calender : penggunaan SWITCH, input angka, output bulan dalam tulisan
+    -Factorial : penggunaan LOOP, input angka, output hasil
+
+Simple project: to-do list
+
+
diff --git a/src/main/java/com/gdn/onboarding/onboardingjava/Calendar.java b/src/main/java/com/gdn/onboarding/onboardingjava/Calendar.java
new file mode 100644
index 0000000..0ffe0d5
--- /dev/null
+++ b/src/main/java/com/gdn/onboarding/onboardingjava/Calendar.java
@@ -0,0 +1,61 @@
+package com.gdn.onboarding.onboardingjava;
+
+public class Calendar {
+    private String month(int month) {
+        switch(month) {
+            case 1:
+                return "January";
+            case 2:
+                return "February";
+            case 3:
+                return "March";
+            case 4:
+                return "April";
+            case 5:
+                return "May";
+            case 6:
+                return "June";
+            case 7:
+                return "July";
+            case 8:
+                return "August";
+            case 9:
+                return "September";
+            case 10:
+                return "October";
+            case 11:
+                return "November";
+            default:
+                return "December";
+        }
+    }
+
+    public static void main(String[] args) {
+        Calendar calendar = new Calendar();
+        String month1 = calendar.month(1);
+        String month2 = calendar.month(2);
+        String month3 = calendar.month(3);
+        String month4 = calendar.month(4);
+        String month5 = calendar.month(5);
+        String month6 = calendar.month(6);
+        String month7 = calendar.month(7);
+        String month8 = calendar.month(8);
+        String month9 = calendar.month(9);
+        String month10 = calendar.month(10);
+        String month11 = calendar.month(11);
+        String month12 = calendar.month(12);
+
+        System.out.println("The first month is: " + month1);
+        System.out.println("The second month is: " + month2);
+        System.out.println("The third month is: " + month3);
+        System.out.println("The fourth month is: " + month4);
+        System.out.println("The fifth month is: " + month5);
+        System.out.println("The sixth month is: " + month6);
+        System.out.println("The seventh month is: " + month7);
+        System.out.println("The eighth month is: " + month8);
+        System.out.println("The ninth month is: " + month9);
+        System.out.println("The tenth month is: " + month10);
+        System.out.println("The eleventh month is: " + month11);
+        System.out.println("The twelfth month is: " + month12);
+    }
+}
diff --git a/src/main/java/com/gdn/onboarding/onboardingjava/Factorial.java b/src/main/java/com/gdn/onboarding/onboardingjava/Factorial.java
new file mode 100644
index 0000000..23851bb
--- /dev/null
+++ b/src/main/java/com/gdn/onboarding/onboardingjava/Factorial.java
@@ -0,0 +1,33 @@
+package com.gdn.onboarding.onboardingjava;
+
+public class Factorial {
+    private int calculateFactorial(int number) {
+        if (number == 1) {
+            return 1;
+        }
+        else {
+            int result = 1;
+            for (int i = 2; i <= number; i++) {
+                result *= i;
+            }
+            return result;
+        }
+    }
+
+    public static void main(String[] args) {
+        Factorial factorial = new Factorial();
+        int factorial1 = factorial.calculateFactorial(1);
+        int factorial2 = factorial.calculateFactorial(2);
+        int factorial3 = factorial.calculateFactorial(3);
+        int factorial4 = factorial.calculateFactorial(4);
+        int factorial5 = factorial.calculateFactorial(5);
+        int factorial6 = factorial.calculateFactorial(6);
+
+        System.out.println("Factorial of 1 : " + factorial1);
+        System.out.println("Factorial of 2 : " + factorial2);
+        System.out.println("Factorial of 3 : " + factorial3);
+        System.out.println("Factorial of 4 : " + factorial4);
+        System.out.println("Factorial of 5 : " + factorial5);
+        System.out.println("Factorial of 6 : " + factorial6);
+    }
+}
diff --git a/src/main/java/com/gdn/onboarding/onboardingjava/LetterGrade.java b/src/main/java/com/gdn/onboarding/onboardingjava/LetterGrade.java
new file mode 100644
index 0000000..3aa1d5c
--- /dev/null
+++ b/src/main/java/com/gdn/onboarding/onboardingjava/LetterGrade.java
@@ -0,0 +1,36 @@
+package com.gdn.onboarding.onboardingjava;
+
+public class LetterGrade {
+    public String getGrade(int point) {
+        if (point > 80) {
+            return "A";
+        } else if (point > 74) {
+            return "AB";
+        } else if (point > 69) {
+            return "B";
+        } else if (point > 64) {
+            return "BC";
+        } else if (point > 59) {
+            return "C";
+        } else {
+            return "D";
+        }
+    }
+
+    public static void main(String[] args) {
+        LetterGrade grader = new LetterGrade();
+        String grade1 = grader.getGrade(90);
+        String grade2 = grader.getGrade(78);
+        String grade3 = grader.getGrade(72);
+        String grade4 = grader.getGrade(68);
+        String grade5 = grader.getGrade(62);
+        String grade6 = grader.getGrade(58);
+
+        System.out.println("Nilai Mata Kuliah 1 : " + grade1);
+        System.out.println("Nilai Mata Kuliah 2 : " + grade2);
+        System.out.println("Nilai Mata Kuliah 3 : " + grade3);
+        System.out.println("Nilai Mata Kuliah 4 : " + grade4);
+        System.out.println("Nilai Mata Kuliah 5 : " + grade5);
+        System.out.println("Nilai Mata Kuliah 6 : " + grade6);
+    }
+}