make a screenshot of your swing or awt GUI

gui selfie

		JFrame frame = new JFrame();
		JTextField textField = new JTextField(new File("selfie.png").getAbsolutePath());
		JButton btn = new JButton("selfie!");
		btn.addActionListener((e)->{
			Img img = new Img(frame.getWidth(), frame.getHeight());
			img.draw(g->{
				frame.paintAll(g);
			});
			System.out.println("flash!");
			try{
				ImageSaver.saveImage(img.getRemoteBufferedImage(), textField.getText());
				System.out.println("saved selfie to " + textField.getText());
			} catch(Exception ex){ex.printStackTrace();}
		});
		frame.getContentPane().setLayout(new BoxLayout(frame.getContentPane(), BoxLayout.Y_AXIS));
		frame.getContentPane().add(btn);
		frame.getContentPane().add(new JSlider(JSlider.HORIZONTAL));
		frame.getContentPane().add(textField);
		frame.pack();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);