Java - JFrame FullScreen

Exemplo de criação de um JFrame FullScreen

package teste1;

//Importamos as bibliotecas que vamos precisar
import javax.swing.*;
import java.awt.GraphicsEnvironment;
import java.awt.GraphicsDevice;
import java.awt.event.*;

//criamos a classe extendida
public class EjemploFullscreen extends JFrame implements ActionListener{
 private JButton boton;
 private boolean estaFull = false;
 static GraphicsDevice grafica=
  GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
 public EjemploFullscreen() {
  super("Ejemplo pantalla completa en Java");
  
  boton = new JButton("Presioname");
  boton.addActionListener(this);
  getContentPane().add(boton);
  
  setSize(640, 400);
  setUndecorated(true);
  setVisible(true);
 }

//Método principal
 public static void main(String[] args) {
  new EjemploFullscreen();
 }

//Metodo de verificação
 public void actionPerformed(ActionEvent e) {
  if(!estaFull)
   grafica.setFullScreenWindow(this);
  else
   grafica.setFullScreenWindow(null);
  estaFull = !estaFull;
 }
}

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