Java Swing实现类似QQ的停靠在桌面边缘时自动隐藏

import java.awt.Point;  import java.awt.Rectangle;  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.JFrame;  import javax.swing.Timer;    public class HideFrame extends JFrame implements ActionListener{      private Rectangle rect;      private int frameLeft;// 窗体离屏幕左边的距离      private int frameRight;// 窗体离屏幕右边的距离；      private int frameTop;// 窗体离屏幕顶部的距离      private int frameWidth; // 窗体的宽      private int frameHeight;    // 窗体的高        private int screenXX;// 屏幕的宽度；      private Point point;    // 鼠标在窗体的位置        private Timer timer = new Timer(10, this);      private int xx, yy;      private boolean isDraging = false;        public HideFrame(){          timer.start();          setTitle("窗体在屏幕边缘隐藏演示");          setSize(400, 300);          setUndecorated(true);          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);          setAlwaysOnTop(true);          addMouseListener(new MouseAdapter() {              public void mousePressed(MouseEvent e) {                  isDraging = true;                  xx = e.getX();                  yy = e.getY();              }                public void mouseReleased(MouseEvent e) {                  isDraging = false;              }          });          addMouseMotionListener(new MouseMotionAdapter() {              public void mouseDragged(MouseEvent e) {                  if (isDraging) {                      int left = getLocation().x;                      int top = getLocation().y;                      setLocation(left + e.getX() - xx, top + e.getY() - yy);                      repaint();                  }              }          });          setVisible(true);      }      @Override      public void actionPerformed(ActionEvent arg0) {          frameLeft = getLocationOnScreen().x;          frameTop = getLocationOnScreen().y;          frameWidth = getWidth();          frameHeight = getHeight();          screenXX = java.awt.Toolkit.getDefaultToolkit().getScreenSize().width;          frameRight =screenXX- frameLeft - frameWidth;            // 获取窗体的轮廓          rect = new Rectangle(0, 0, frameWidth, frameHeight);          // 获取鼠标在窗体的位置          point =getMousePosition();            if (frameLeft < 0 && isPtInRect(rect, point)) {              setLocation(0, frameTop); // 隐藏在左边，鼠标指到后显示窗体；          } else if (frameLeft > -5 && frameLeft < 5 && !(isPtInRect(rect, point))) {              setLocation(frameLeft - frameWidth + 1, frameTop); // 窗体移到左边边缘隐藏到左边；          } else if ((frameTop < 0 && frameLeft < 0) && isPtInRect(rect, point)) {// 窗体在左上角；              setLocation(0, 0);// 窗口隐藏了，鼠标指到他，就显示出来；          } else if ((frameTop > -5 && frameTop < 5) && (frameLeft > -5 && frameLeft < 5) && !(isPtInRect(rect, point))) {              // 当窗体的上边框与屏幕的顶端的距离小于5时 ，              // 并且鼠标不再窗体上将窗体隐藏到屏幕的顶端              setLocation(frameLeft - frameWidth + 1, 1);          } else if ((frameTop < 0) && isPtInRect(rect, point)) {              setLocation(frameLeft, 0);// 窗口隐藏了，鼠标指到他，就显示出来；          } else if (frameTop > -5 && frameTop < 5 && !(isPtInRect(rect, point))) {              // 当窗体的上边框与屏幕的顶端的距离小于5时 ，              // 并且鼠标不再窗体上将窗体隐藏到屏幕的顶端              setLocation(frameLeft, 1 - frameHeight);          } else if (frameRight < 0 && isPtInRect(rect, point)) {              setLocation(screenXX - frameWidth + 1, frameTop);// 隐藏在右边，鼠标指到后显示；          } else if (frameRight > -5 && frameRight < 5 && !(isPtInRect(rect, point))) {              setLocation(screenXX - 1, frameTop); // 窗体移到屏幕右边边缘隐藏到右边；          } else if (frameRight < 0 && frameTop < 0 && isPtInRect(rect, point)) {// 窗体在右上角；              setLocation(screenXX - frameWidth + 1, 0);// 隐藏在右边，鼠标指到后显示；          } else if ((frameRight > -5 && frameRight < 5) && (frameTop > -5 && frameTop < 5) && !(isPtInRect(rect, point))) {              setLocation(screenXX - 1, 1); // 窗体移到屏幕右边边缘隐藏到右边；          }      }        /**       * 检测是否在矩形框内       * @param rect       * @param point       * @return       */      public boolean isPtInRect(Rectangle rect, Point point) {          if (rect != null && point != null) {              int x0 = rect.x;              int y0 = rect.y;              int x1 = rect.width;              int y1 = rect.height;              int x = point.x;              int y = point.y;                return x >= x0 && x < x1 && y >= y0 && y < y1;          }          return false;      }      public static void main(String[] args){          HideFrame frame = new HideFrame();      }  }