EjemploDEWTDFRE

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class EjemploText2 extends JFrame implements ActionListener
{
JButton boton1, boton2;
JLabel label;
JTextField texto;
public EjemploText2()
{
JPanel apanel = (JPanel) this.getContentPane();
apanel.setLayout(null);
apanel.setBackground( new Color (128, 128 , 0));

setSize(300, 150);
setTitle("Ejemplo");
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);

boton1=new JButton("Aceptar");
boton1.setBounds(135, 120, 100,30);
add(boton1);
boton1.addActionListener(this);

boton2=new JButton("Cerrar");
boton2.setBounds(135, 250, 100, 30);
add(boton2);
boton2.addActionListener(this);
boton2.setEnabled(true);
label = new JLabel("Numero: ");
label.setBounds(40, 40, 100, 20);
label.setBackground( new Color(200, 20, 255));
label.setVisible(true);
add(label);
texto = new JTextField(20);
texto.setBounds(130, 40, 140, 25);
texto.setBackground(new Color(0, 0, 0));
texto.setForeground(new Color (255, 255, 0));
texto.setVisible(true);
add(texto);
}

public void actionPerformed(ActionEvent e)
{
if(e.getSource()==boton1)
{
String num=texto.getText();
int x1=Integer.parseInt(num);
JPanel borrador = (JPanel) this.getContentPane();
JTextField cosa = new JTextField();
borrador.setLayout(null);
borrador.setBackground(new Color(128, 0, 0));
cosa.setBounds(new Rectangle(25, 180, 250, 30));
cosa.setText("El numero es: " + x1);
cosa.setEditable(false);
cosa.setHorizontalAlignment(JTextField.LEFT);
borrador.add(cosa, null);
}
if(e.getSource()==boton2)
{
System.exit(0);
}
}
public static void main(String args[])
{
EjemploText2 ventana1 = new EjemploText2();
ventana1.setBounds(100, 110, 450,350);
}
}