Create undecorated frame
import java.awt.BorderLayout;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class Main {
private static Point point = new Point();
public static void main(String[] args) {
final JFrame frame = new JFrame();
frame.setUndecorated(true);
JButton button = new JButton("Close Me");
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
frame.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
point.x = e.getX();
point.y = e.getY();
}
});
frame.addMouseMotionListener(new MouseMotionAdapter() {
public void mouseDragged(MouseEvent e) {
Point p = frame.getLocation();
frame.setLocation(p.x + e.getX() - point.x, p.y + e.getY() - point.y);
}
});
frame.setSize(300, 300);
frame.setLocation(200, 200);
frame.setLayout(new BorderLayout());
frame.getContentPane().add(button, BorderLayout.NORTH);
frame.getContentPane().add(new JLabel("Drag Me", JLabel.CENTER), BorderLayout.CENTER);
frame.setVisible(true);
}
}
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