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Menus.java
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Menus.java
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import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Formulario extends JFrame implements ActionListener{
private JMenuBar menubar;
private JMenu menu1;
private JMenuItem menuitem1, menuitem2, menuitem3;
public Formulario(){
setLayout(null);
menubar = new JMenuBar();
setJMenuBar(menubar);
menu1 = new JMenu("Opciones");
menubar.add(menu1);
menuitem1 = new JMenuItem("Rojo");
menuitem1.addActionListener(this);
menu1.add(menuitem1);
menuitem2 = new JMenuItem("Verde");
menuitem2.addActionListener(this);
menu1.add(menuitem2);
menuitem3 = new JMenuItem("Azul");
menuitem3.addActionListener(this);
menu1.add(menuitem3);
}
public void actionPerformed(ActionEvent e){
Container fondo = this.getContentPane();
if(e.getSource() == menuitem1){
fondo.setBackground(new Color(255,0,0));
}
if(e.getSource() == menuitem2){
fondo.setBackground(new Color(0,255,0));
}
if(e.getSource() == menuitem3){
fondo.setBackground(new Color(0,0,255));
}
}
public static void main(String args[]){
Formulario formulario1 = new Formulario();
formulario1.setBounds(0,0,400,300);
formulario1.setVisible(true);
formulario1.setLocationRelativeTo(null);
}
}