使Java摆动框架可移动和setUndecorated

以下代码将创建一个不带标题栏的Jframe，您仍然可以在其中移动它：

import javax.swing.*;import java.awt.*;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;public class frameDragListenerExample {    public static void main(String[] args) {        Runnable runnable = new Runnable() { public void run() {     final Jframe frame = new Jframe("Hello");     frame.setUndecorated(true);     frame.setBounds(0, 0, 400, 400);     JPanel contentPane = new JPanel(new BorderLayout());     JLabel label = new JLabel("Click anywhere in the Jframe and drag");     label.setFont(label.getFont().deriveFont(16f));     label.setBorder(BorderFactory.createEmptyBorder(100, 100, 100, 100));     contentPane.add(label);     frame.setContentPane(contentPane);     frameDragListener frameDragListener = new frameDragListener(frame);     frame.addMouseListener(frameDragListener);     frame.addMouseMotionListener(frameDragListener);     frame.pack();     frame.setLocationRelativeTo(null);     frame.setVisible(true); }        };        SwingUtilities.invokeLater(runnable);    }    public static class frameDragListener extends MouseAdapter {        private final Jframe frame;        private Point mouseDownCompCoords = null;        public frameDragListener(Jframe frame) { this.frame = frame;        }        public void mouseReleased(MouseEvent e) { mouseDownCompCoords = null;        }        public void mousePressed(MouseEvent e) { mouseDownCompCoords = e.getPoint();        }        public void mouseDragged(MouseEvent e) { Point currCoords = e.getLocationOnScreen(); frame.setLocation(currCoords.x - mouseDownCompCoords.x, currCoords.y - mouseDownCompCoords.y);        }    }}

您仍然可以通过拖动框架的主体来拖动它。