diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7aa0cb8
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+EF1.class
+EF2.class
+EF4.class
\ No newline at end of file
diff --git a/EF1.java b/EF1.java
index 66ebb69..10633c7 100644
--- a/EF1.java
+++ b/EF1.java
@@ -1,15 +1,13 @@
 public class EF1{
-	
 	public static void main(String args[]){
-		int n = Integer.parseInt(args[0]);
-		System.out.println(Factorial(n));
-	}	
-
-	public static int Factorial(int n){
-		if(){//Escribir condición de salida 
-			return 1;  
-		}else{//Escribir el retorno para la recursividad
+		int numero = Integer.parseInt(args[0]);
+		System.out.println(Factorial(numero));
+		}
+		public static int Factorial(int numero){
+			if(numero==1 || numero==0){
+				return 1;
+			}else{return numero*Factorial(numero-1);
 
 		}
 	}
-}
\ No newline at end of file
+}
diff --git a/EF2.java b/EF2.java
index c70e201..bcadf81 100644
--- a/EF2.java
+++ b/EF2.java
@@ -1,9 +1,31 @@
-public class EF2{
-	
-	public static void main(String args[]){
-		
-		
-	}	
+public class EF2 {
+    public static void main(String[] args) {
+        int arr[] = {2, 3, 8, 109, 13, 4, 18, 10, 23, 18, 50, 11, 13, 2}; 
+        EF2 arreglo = new EF2();
+        arreglo.sort(arr);
+        arreglo.imprimir(arr);
+ }
+    public void sort(int arr []){
+        for(int i = 0; i < (arr.length); i++){
+             for (int j = 1; j < (arr.length-i);j++){
+                 if (arr[j-1] > arr [j]){
+                     int temp = arr [j];
+                     arr [j] = arr [j-1];
+                     arr [j-1] = temp; 
+                 }
+                 }
+             }
+        }
+    
+    public void imprimir(int arr []){
+        System.out.print("{");
+        for (int i = 0; i < arr.length ; i++){
+            System.out.print(arr[i]); 
+            if (i!=(arr.length-1)) {
+                System.out.print(",");
+                }
+                }  
+            System.out.println("}");
 
-	
+}
 }
\ No newline at end of file
diff --git a/EF4.java b/EF4.java
new file mode 100644
index 0000000..9ba1ab4
--- /dev/null
+++ b/EF4.java
@@ -0,0 +1,57 @@
+import java.awt.FlowLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JTextField;
+import javax.swing.WindowConstants;
+
+public class EF4 extends JFrame  implements ActionListener{
+    
+    public JButton btnBotonSumar = new JButton("SUMAR");
+    public JLabel lblNumeros = new JLabel("INGRESE NUMEROS : ");
+    public JTextField txtNumeros = new JTextField(20);
+    public JLabel lblResultado = new JLabel();
+
+  public static void main(String args[]){
+            EF4 ventana = new EF4();
+            ventana.show();
+  }
+
+  public EF4(){
+    setSize(250, 300);
+    setTitle("Sumadora");
+    setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+    setResizable(false);
+    this.btnBotonSumar.addActionListener(this);
+    FlowLayout DISTRIBUIDOR = new FlowLayout(FlowLayout.CENTER,30,30);
+        this.setLayout(DISTRIBUIDOR);
+        this.add(this.lblNumeros);
+        this.add(this.txtNumeros);
+        this.add(this.btnBotonSumar);
+        this.add(this.lblResultado);    
+    }
+
+  public String getSuma(String entrada){
+    String[] numeros = entrada.split(",");
+    int suma = 0;
+    //Realizar suma
+    for(String numero:numeros)
+    {
+    suma += Integer.parseInt(numero);
+    }
+    return "Resultado:" +suma+ "";
+  }
+  
+      @Override
+    public void actionPerformed(ActionEvent AE) 
+    {
+        if(AE.getSource() == this.btnBotonSumar)
+        {
+        String entrada = txtNumeros.getText();
+        lblResultado.setText(getSuma(entrada));
+        }
+
+            }
+}
\ No newline at end of file