import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URL;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

import com.sun.awt.AWTUtilities;

public class TransparentesFenster extends JFrame implements ActionListener {

	private static final long serialVersionUID = 1L;

	private JButton newButt, exitButt;

	public TransparentesFenster() {
		super();
		setUndecorated(true);
		AWTUtilities.setWindowOpaque(this, false);
		JPanel contentPane = new JPanel();
		contentPane.setLayout(new BorderLayout());
		URL url = getClass().getClassLoader().getResource("test.png");
		ImageIcon icon = new ImageIcon(url);
		contentPane.add(new JLabel(icon, JLabel.CENTER), BorderLayout.CENTER);

		JPanel buttPanel = new JPanel(new FlowLayout());
		newButt = new JButton("Neu");
		newButt.addActionListener(this);
		buttPanel.add(newButt);
		exitButt = new JButton("Beenden");
		exitButt.addActionListener(this);
		buttPanel.add(exitButt);
		contentPane.add(buttPanel, BorderLayout.SOUTH);
		setContentPane(contentPane);
		this.pack();
		this.setAlwaysOnTop(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.setLocationRelativeTo(null);
		this.setVisible(true);
	}

	public void actionPerformed(ActionEvent e) {
		if (e.getSource() == newButt) {
			System.out.println("Neu");
			setVisible(false);
			dispose();
		}
		if (e.getSource() == exitButt) {
			System.out.println("Beenden");
			System.exit(0);
		}
	}
	
	public static void main(String[] args) {
		new TransparentesFenster();
	}
}