diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e60f755..1a3ce29 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,6 +1,5 @@
 name: Java CI
 
-
 on: [push, pull_request]
 
 jobs:
@@ -15,7 +14,8 @@ jobs:
           java-version: '17'
           distribution: 'adopt'
       - run: java src/algoritmos/Quicksort.java
+      - run: java src/algoritmos/OrdenacaoSort.java
       - run: java src/algoritmos/RadixSort.java
       - run: java src/algoritmos/BubbleSort.java
       - run: java src/algoritmos/MergeSort.java
-      - run: java src/algoritmos/SelectionSort.java
\ No newline at end of file
+      - run: java src/algoritmos/SelectionSort.java
diff --git a/src/algoritmos/MergeSort.java b/src/algoritmos/MergeSort.java
index a1ad3c3..c25eead 100644
--- a/src/algoritmos/MergeSort.java
+++ b/src/algoritmos/MergeSort.java
@@ -2,7 +2,7 @@
 
 import java.io.IOException;
 
-public class Mergesort {
+public class MergeSort {
 
 	public static void main(String[] args) throws IOException {
 		int quantidade = 10000;
@@ -45,7 +45,9 @@ private static void mergeSort(int[] a, int n) {
 	private static void merge(
       int[] a, int[] l, int[] r, int left, int right) {
      
-        int i = 0, j = 0, k = 0;
+        int i = 0;
+        int j = 0;
+        int k = 0;
         while (i < left && j < right) {
             if (l[i] <= r[j]) {
                 a[k++] = l[i++];
diff --git a/src/algoritmos/OrdenacaoSort.java b/src/algoritmos/OrdenacaoSort.java
new file mode 100644
index 0000000..899b4de
--- /dev/null
+++ b/src/algoritmos/OrdenacaoSort.java
@@ -0,0 +1,49 @@
+package algoritmos;
+
+import java.util.Arrays;
+
+public class OrdenacaoSort {
+	
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+
+		int[] vetor = { 5, 9, 7, 4, 6, 1, 2, 3, 10, -1, };
+
+		System.out.println(Arrays.toString(vetor));
+		quickSort(vetor, 0, vetor.length - 1);
+		System.out.println(Arrays.toString(vetor));
+
+	}
+
+	private static void quickSort(int[] vetor, int inicio, int fim) {
+		if (inicio < fim) {
+			int posicaoPivo = separar(vetor, inicio, fim);
+			quickSort(vetor, inicio, posicaoPivo - 1);
+			quickSort(vetor, posicaoPivo + 1, fim);
+
+		}
+	}
+
+	private static int separar(int[] vetor, int inicio, int fim) {
+		int pivo = vetor[inicio];
+		int i = inicio + 1;
+		int fimTemp = fim;
+		while (i <= fimTemp) {
+			if (vetor[i] <= pivo)
+				i++;
+			else if (pivo < vetor[fimTemp])
+				fimTemp--;
+			else {
+				int troca = vetor[i];
+				vetor[i] = vetor[fimTemp];
+				vetor[fimTemp] = troca;
+				i++;
+				fimTemp--;
+			}
+		}
+		vetor[inicio] = vetor[fimTemp];
+		vetor[fimTemp] = pivo;
+		return fimTemp;
+	}
+
+}
diff --git a/src/algoritmos/Quicksort.java b/src/algoritmos/Quicksort.java
index 9f109aa..cd7af08 100644
--- a/src/algoritmos/Quicksort.java
+++ b/src/algoritmos/Quicksort.java
@@ -30,7 +30,8 @@ private static void quickSort(int[] vetor, int inicio, int fim) {
 
 	private static int posicaoPivor(int[] vetor, int inicio, int fim) {
 		int pivo = vetor[inicio];
-		int i = inicio + 1, f = fim;
+		int i = inicio + 1; 
+		int f = fim;
 		while (i <= f) {
 			if (vetor[i] <= pivo)
 				i++;
diff --git a/src/algoritmos/SelectionSort.java b/src/algoritmos/SelectionSort.java
index c7d5ef7..c4d1ba7 100644
--- a/src/algoritmos/SelectionSort.java
+++ b/src/algoritmos/SelectionSort.java
@@ -1,7 +1,5 @@
 package algoritmos;
 
-import java.io.IOException;
-
 public class SelectionSort {
 
 	public static void main(String args[]) {
diff --git a/src/algoritmos/SelectionSortExample.java b/src/algoritmos/SelectionSortExample.java
new file mode 100644
index 0000000..61248e7
--- /dev/null
+++ b/src/algoritmos/SelectionSortExample.java
@@ -0,0 +1,38 @@
+package algoritmos;
+
+public class SelectionSortExample {  
+       
+    public static void main(String a[]){  
+    	int quantidade = 10000;
+		int[] arr1 = new int[quantidade];
+    	
+        System.out.println("Before Selection Sort");  
+        for (int i = 0; i < arr1.length; i++) {
+        	arr1[i] = (int) (Math.random() * quantidade);
+        	System.out.print(arr1[i]+" ");  
+        }  
+        System.out.println();  
+          
+        selectionSort(arr1);//sorting array using selection sort  
+         
+        System.out.println("After Selection Sort");  
+        for (int i = 0; i < arr1.length; i++) {
+            System.out.print(arr1[i]+" ");  
+        }  
+    }  
+    
+    public static void selectionSort(int[] arr){  
+        for (int i = 0; i < arr.length - 1; i++)  
+        {  
+            int index = i;  
+            for (int j = i + 1; j < arr.length; j++){  
+                if (arr[j] < arr[index]){  
+                    index = j;//searching for lowest index  
+                }  
+            }  
+            int smallerNumber = arr[index];   
+            arr[index] = arr[i];  
+            arr[i] = smallerNumber;  
+        }  
+    }  
+}  
diff --git a/src/exemplos/Main.java b/src/exemplos/Main.java
new file mode 100644
index 0000000..c2d1de7
--- /dev/null
+++ b/src/exemplos/Main.java
@@ -0,0 +1,47 @@
+package exemplos;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+
+public class Main {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		f(10);
+		readFile("");
+		validarString("omnilink");
+	}
+
+	public static long f(int n) {
+		if (n < 2) {
+            return n;
+        } else {
+            return f(n - 1) + f(n - 2);
+        }
+    }
+	
+	public static String readFile(String fileName){ 
+	    BufferedReader br; 
+	    try { 
+	        br = new BufferedReader(new FileReader(fileName)); 
+	        final StringBuilder sb = new StringBuilder(); 
+	        String line = br.readLine(); 
+	 
+	        while (line != null) { 
+	            sb.append(line); 
+	            sb.append(System.lineSeparator()); 
+	            line = br.readLine(); 
+	        } 
+	        br.close(); 
+	        return sb.toString(); 
+	    } catch (IOException e) { 
+	        e.printStackTrace(); 
+	    } 
+	    return ""; 
+	}
+	
+	public static boolean validarString(String entrada) {
+		return entrada != null && !entrada.equals("") && entrada.length() > 3;
+	}
+}