move

/*
	* 在主窗口显示"Hello World"，并能用鼠标拖动
	* @author 张德瑞
	*/
	import java.awt.Color;
	import java.awt.Font;
	import java.awt.Graphics;
	import java.awt.Graphics2D;
	import java.awt.event.MouseEvent;
	import java.awt.event.MouseMotionListener;
	import javax.swing.JFrame;
	import javax.swing.JPanel;
	public class Demo04 {
	private int x = 100;
	private int y = 250;
	public void ShowJframe() {
	JFrame jframe = new JFrame("移动的文字");
	@SuppressWarnings("serial")
	final JPanel jpanel = new JPanel() {
	public void paint(Graphics g) {
	Graphics2D graphics = (Graphics2D) g;
	graphics.setColor(Color.white);
	graphics.fillRect(0, 0, 400, 500);
	graphics.setFont(new Font("黑体", Font.BOLD, 20));
	graphics.setColor(Color.red);
	graphics.drawString("Hello World", x, y);
	}
	};
	jpanel.addMouseMotionListener(new MouseMotionListener() {
	@Override
	public void mouseMoved(MouseEvent e) {
	}
	@Override
	public void mouseDragged(MouseEvent e) {
	x = e.getX();
	y = e.getY();
	jpanel.repaint();
	}
	});
	jframe.add(jpanel);
	jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	jframe.setBounds(200, 300, 400, 500);
	jframe.setVisible(true);
	}
	public static void main(String[] args) {
	new Demo04().ShowJframe();
	}
	}
	}