上機題目（初級）- 鼠標控制小球實例代碼（Java）

上機題目（初級）- 鼠標控制小球實例代碼（Java）

本節實現小球跟隨鼠標移動的功能，這裡要實現鼠標移動監聽，代碼如下：

import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Panel;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;

public class KeyListenerDemo {

	public static void main(String[] args) {
		Frame frame = new Frame();
		frame.setSize(800, 800);
		frame.setBackground(Color.BLACK);
		MyPanel myPanel = new MyPanel();
		frame.add(myPanel);
		frame.addMouseMotionListener(myPanel);
		myPanel.addMouseMotionListener(myPanel);

		frame.show();

	}
}

class MyPanel extends Panel implements MouseMotionListener {
	int x = 150;
	int y = 150;

	@Override
	public void paint(Graphics g) {
		g.setColor(Color.WHITE);
		g.fillOval(x, y, 20, 20);
	}

	@Override
	public void mouseDragged(MouseEvent e) {
		
	}

	@Override
	public void mouseMoved(MouseEvent e) {
		x=e.getX();
		y=e.getY();
		repaint();
		
	}

	
}