拖动去掉边框的JFrame

似乎业界的程序员都不喜欢用java来开发图形界面，但是因为跨平台的原因，对java的桌面编程非常的感兴趣，想使用它做出一套漂亮的图形界面。

此篇文章主要介绍，java下通过swing实现win8的磁力铁

原理：继承java的swing组件，对其进行功能的扩展

java swing界面的jframe中重生之大文豪，通过setUndecorated(true)方法可以去掉周围的边框，后果是我们没法拖动这个窗口了；以下代码提供了一种方式来解决这个问题：

 

public class ShowMain{
    public static void main(String[] args) {
        MyFrame frame = new MyFrame();
    }
}
class MyFrame extends JFrame implements MouseListener,MouseMotionListener{
    JFrame frame;
    Container container;
    int x;
    int y;
    int tempX;
    int tempY;
    int winX;
    int winY;
    int oldX;
    int oldY;

    public MyFrame() {
        init();
    }

    public void init(){
        frame = this;
        container = frame.getContentPane();
        frame.setBounds(300, 300, 300, 300);
        container.setBackground(Color.BLUE);
        frame.setUndecorated(true);
        frame.setVisible(true);
        frame.addMouseListener(this);
        frame.addMouseMotionListener(this);
    }

    @Override
    public void mouseDragged(MouseEvent e) {
        Point point = e.getPoint();
        Rectangle rec = frame.getBounds();

        winX = (int)rec.getX();
        winY = (int)rec.getY();
        x = (int)point.getX();
        y = (int)point.getY();
        tempX = x - oldX;
        tempY = y - oldY;

        frame.setLocation((int)(winX + tempX), (int)(winY + tempY));
    }

    @Override
    public void mousePressed(MouseEvent e) {
        Rectangle rec = frame.getBounds();
        Point point = e.getPoint();
        tempX = (int)point.getX();
        tempY = (int)point.getY();
        oldX = (int)point.getX();
        oldY = (int)point.getY();
    }
    @Override
    public void mouseClicked(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
    }
    @Override
    public void mouseReleased(MouseEvent e) {
        // TODO Auto-generated method stub
    }
    @Override
    public void mouseMoved(MouseEvent e) {
        // TODO Auto-generated method stub
    }
}

运行截图（通过鼠标可以拖动一下的方块窗体）：