qq项目第一天(java JFrame 标题栏 最小化 最大化 拖动窗体)

package com.xiangqiao123.view; import java.awt.BorderLayout; import java.awt.Cursor; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Point; import java.awt.Toolkit; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; public class QqClientLogin extends JFrame implements MouseListener { // 登录界面的上半部分 // 最上面的最小化和关闭 JPanel topJp1 = null; JLabel topJl1 = null; JLabel topJl2 = null; JLabel topJl3 = null; // 第二部分的图片 JPanel topJp2 = null; JLabel topJl4 = null; // 为实现拖动 Point loc = null; Point tmp = null; boolean isDragged = false; // 登录界面的中间部分 // 登录界面的下面部分 public static void main(String[] args) { new QqClientLogin(); } public QqClientLogin() { // 实现拖动 setDragable(); // 登录界面的最上半部分 topJp1 = new JPanel(); topJl1 = new JLabel(new ImageIcon("image/lb1.jpg")); topJl2 = new JLabel(new ImageIcon("image/lb2.jpg")); topJl2.addMouseListener(this); topJl3 = new JLabel(new ImageIcon("image/lb3.jpg")); topJl3.addMouseListener(this); // 图片部分 topJp2 = new JPanel(); topJl4 = new JLabel(new ImageIcon("image/head.jpg")); topJp1.setLayout(new FlowLayout(FlowLayout.LEFT, 0, 0)); topJp2.setLayout(new FlowLayout(FlowLayout.LEFT, 0, 0)); topJp1.add(topJl1); topJp1.add(topJl2); topJp1.add(topJl3); topJp2.add(topJl4); // 登录界面的中部 // 登录界面的下半部分 // this.getContentPane().setBackground(Color.blue); this.add(topJp1, BorderLayout.NORTH); this.add(topJp2); this.setUndecorated(true); this.setSize(345, 250); //设置居中显示 Dimension size=Toolkit.getDefaultToolkit().getScreenSize(); int x=(int) ((size.getWidth()-this.getWidth())/2); int y=(int) ((size.getHeight()-this.getHeight())/2); this.setLocation(x, y); this.setVisible(true); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } @Override public void mouseClicked(MouseEvent e) { // TODO Auto-generated method stub if (e.getSource() == topJl2) { this.setExtendedState(this.ICONIFIED); // 最小化 } if (e.getSource() == topJl3) { System.exit(0);// 关闭，退出程序 } } @Override public void mousePressed(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseReleased(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub } // 实现拖动 private void setDragable() { this.addMouseListener(new java.awt.event.MouseAdapter() { public void mouseReleased(java.awt.event.MouseEvent e) { isDragged = false; setCursor(new Cursor(Cursor.DEFAULT_CURSOR)); } public void mousePressed(java.awt.event.MouseEvent e) { tmp = new Point(e.getX(), e.getY()); isDragged = true; setCursor(new Cursor(Cursor.MOVE_CURSOR)); } }); this.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() { public void mouseDragged(java.awt.event.MouseEvent e) { if (isDragged) { loc = new Point(getLocation().x + e.getX() - tmp.x, getLocation().y + e.getY() - tmp.y); setLocation(loc); } } }); } }