diff --git a/EF1.java b/EF1.java
index 66ebb69..096f603 100644
--- a/EF1.java
+++ b/EF1.java
@@ -1,15 +1,20 @@
-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
-
-		}
-	}
+public class EF1{
+    
+    public static void main(String args[]){
+	int n = Integer.parseInt(args[0]);
+
+        class Factorial{
+        public int Factorial(int m){
+        if (m == 0){
+            return 1;
+        }
+        else{
+            return m*Factorial(m-1);
+        }
+        }
+        }
+     Factorial resultado = new Factorial();
+     
+        System.out.println(resultado.Factorial(n));
+     }
 }
\ No newline at end of file
diff --git a/EF2.java b/EF2.java
index c70e201..c1bec6e 100644
--- a/EF2.java
+++ b/EF2.java
@@ -1,9 +1,35 @@
-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[] array = {2, 3, 8, 109, 13, 4, 18, 10, 23, 18, 50, 11, 13, 2};
+      EF2 bub = new EF2();
+      bub.sort(array);
+      bub.print(array);
+  }
+  
+  public void sort(int array[]){
+      
+    for (int i = 0 ; i < array.length ; i++) {
+        for (int j = 1 ; j < array.length-i ; j=(1+j)) {
+           if (array [j-1] > array[j]) {
+                int temp = array[j-1];
+                array[j-1] = array[j];
+                array[j] = temp;
+            }
+        }
+    }
+  }
+  
+  public void print (int array[]) {
+      System.out.print("{");
+      for (int i = 0 ; i < array.length ; i++){
+           System.out.print(array[i]);
+           if (i < array.length -1){
+               System.out.print(", ");
+           }
+              else {
+                System.out.print("}");
+           }
+      }
+  }
+}
diff --git a/EF4.java b/EF4.java
index cb85211..64325df 100644
--- a/EF4.java
+++ b/EF4.java
@@ -1,30 +1,85 @@
-import javax.swing.JFrame;
-import javax.swing.WindowConstants;
-
-public class EF4 extends JFrame{
-
-	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);
-
-  }
-
-  public String getSuma(String entrada){
-    String[] numeros = entrada.split(",");
-    int suma = 0;
-    //Realizar suma
-    for(String numero:numeros)
-    {
-
-    }
-    return suma+"";
-  }
-
-}
+import java.awt.event.ActionListener;
+import java.awt.event.ActionEvent;
+import javax.swing.JFrame;
+import javax.swing.WindowConstants;
+import javax.swing.JTextField;
+import javax.swing.JLabel;
+import javax.swing.JButton;
+
+public class EF4 extends JFrame implements ActionListener{
+
+	public static void main(String args[]){
+	EF4 ventana = new EF4();
+        ventana.campoTexto();
+        ventana.show();
+        ventana.paintAll(ventana.getGraphics());
+        
+	}
+
+  public EF4(){
+    setSize(250, 300);
+    setTitle("Sumadora");
+    setLayout(null);
+    setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+    setResizable(false);
+    
+  }
+  
+  private JTextField Campo;
+  private JLabel label1;
+  private JButton boton;
+  private JLabel label2;
+      
+  public void campoTexto(){
+      Campo = new JTextField("0");
+      Campo.setBounds(75,100,100,25);
+      Campo.setEditable(true);
+      Campo.setHorizontalAlignment(JTextField.RIGHT);
+      this.add(Campo);
+      
+      label1 = new JLabel();
+      label1.setText("Ingrese los valores:");
+      label1.setBounds(70, 60, 150, 25);
+      this.add(label1);
+      
+      boton = new JButton();
+      boton.setText("Suma");
+      boton.setBounds(75, 140, 100, 25);
+      boton.addActionListener(this);
+      this.add(boton);
+
+      label2 = new JLabel();
+      label2.setBounds(75, 180, 100, 25);
+      label2.setText("");
+      this.add(label2);
+      
+  }
+
+  @Override
+  public void actionPerformed(ActionEvent e){
+      
+      String res = this.getSuma(Campo.getText());
+
+      label2.setText("Resultado:   " + res);
+  }  
+ 
+  public String getSuma(String entrada){
+    
+    String[] numeros = entrada.split(",");
+    
+    
+    int suma = 0;
+    //Realizar suma
+    int temp = 0;
+    for(String numero:numeros)
+    {
+        int a = Integer.parseInt(numero);
+            suma = temp + a;
+            temp = suma;
+        
+    }
+    return suma+"";
+    
+  }
+  
+}