public class WhatEver{
public static void main(String... args) {
JFrame frame = new JFrame();
JPanel panel = new JPanel();
panel.add(new JButton("klar geht das!!"));
frame.add(panel);
frame.setUndecorated(true);
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}
final JFrame frame = new JFrame();
JPanel panel = new JPanel();
JButton button = new JButton("action");
panel.add(button);
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
frame.dispose();
frame.setUndecorated((frame.isUndecorated()?false:true));
frame.pack();
frame.setVisible(true);
}
});
frame.add(panel);
frame.setUndecorated(false);
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setVisible(true);