diff --git a/EF1.java b/EF1.java
index 66ebb69..4cf0f57 100644
--- a/EF1.java
+++ b/EF1.java
@@ -1,15 +1,22 @@
-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
-
-		}
-	}
-}
\ No newline at end of file
+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 (n<=0){
+             return 0;
+         }else{
+       if (n == 1) {
+             return 1;
+         } else {
+             return n * Factorial(n - 1);
+         }
+         }
+     }
+ 
+ }
\ No newline at end of file
diff --git a/EF2.java b/EF2.java
index c70e201..a08b9b1 100644
--- a/EF2.java
+++ b/EF2.java
@@ -1,9 +1,37 @@
-public class EF2{
-	
-	public static void main(String args[]){
-		
-		
-	}	
-
-	
-}
\ No newline at end of file
+
+public class EF2 {
+
+
+public static void main(String[] args) {
+ 
+    
+    int[] matriz= {2, 3, 8, 109, 13, 4, 18, 10, 23, 18, 50, 11, 13, 2};
+    int aux;
+ 
+ 	System.out.print("{");
+ 		
+ 	for(int i=0;i<matriz.length;i++) {
+ 	for(int j=i+1;j<matriz.length;j++) {
+ 		if(matriz[i]>matriz[j]) {
+ 			aux=matriz[i];
+ 			matriz[i]=matriz[j];
+ 			matriz[j]=aux;
+ 				 
+ 					}
+ 			
+ 				}
+ 				
+ 			if(i<matriz.length-1) {
+ 				System.out.print(matriz[i]+", ");
+			}
+ 			else {
+ 				System.out.print(matriz[i]);
+ 			}
+ 
+ 		}
+ 			
+ 			System.out.print("}");
+		}
+ 
+ 
+  	}	
\ No newline at end of file
diff --git a/EF4.java b/EF4.java
new file mode 100644
index 0000000..cdb47c7
--- /dev/null
+++ b/EF4.java
@@ -0,0 +1,73 @@
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import javax.swing.*;
+    
+public class EF4 extends JFrame implements ActionListener{
+   JButton sumar;
+   JTextField ingresar;
+   JLabel texto;
+   JLabel resultado;
+	public static void main(String args[]){
+      
+	EF4 ventana = new EF4();
+          ventana.show();
+        }
+            
+  public EF4(){
+    setSize(350, 300);
+    setTitle("Sumadora");
+    setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+    setResizable(false);
+    setLayout(null);
+    
+    texto = new JLabel();
+    texto.setText("Ingrese la serie de números separados por coma:");
+    texto.setBounds(15, 70, 1000, 20);
+    getContentPane().add(texto);
+    
+    ingresar = new JTextField();
+    ingresar.setBounds(45, 120, 250, 20);
+    getContentPane().add(ingresar);
+    
+    sumar = new JButton();
+    sumar.setText("Sumar");
+    sumar.setBounds(120, 170, 100, 20);
+    getContentPane().add(sumar);
+     sumar.addActionListener(this);
+
+    
+    resultado = new JLabel();
+    resultado.setText("");
+    resultado.setBounds(150, 220, 100, 20);
+    getContentPane().add(resultado);
+    
+   
+  }
+
+  public  String getSuma(){
+    String entrada = ingresar.getText().trim();
+     String [] numeros;
+       numeros = entrada.split(",");
+       int suma = 0;
+       for(int i=0; i< numeros.length; i++){
+           
+          suma =+ suma + Integer.parseInt(numeros[i]);
+          
+        }
+       
+   resultado.setText(String.valueOf(suma));
+    return "";
+  }
+
+    @Override
+    public void actionPerformed(ActionEvent evento) {
+       
+       if(evento.getSource()== sumar){ 
+           
+           getSuma();
+       }
+        
+    }
+    
+        
+        }
\ No newline at end of file