java入門第六天之跟屁蟲小球

通過鼠標監聽

MouseMotionListener

中的

public void mouseMoved(MouseEvent e) {
// TODO Auto-generated method stub
x = e.getX();
y = e.getY();

}

方法

來獲取鼠標座標並賦給小球座標實現小球跟隨移動

package day06;

import java.awt.Color;
import java.awt.Event;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class MyMouseBall {
	public static void main(String[] args) {
		JFrame frame = new JFrame("MyMouseBall");
		frame.setSize(400, 500);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setLocationRelativeTo(null);
		//
		MyMouseBallPanel mmbp = new MyMouseBallPanel();
		frame.add(mmbp);
		// 給面板對象添加監聽
		mmbp.addMouseListener(mmbp);
		mmbp.addMouseMotionListener(mmbp);
		frame.setVisible(true);
	}
}

class MyMouseBallPanel extends JPanel implements MouseListener , MouseMotionListener{
	int x ;
	int y ;
	public void paint(Graphics g) {
		super.paint(g);
		g.setColor(Color.BLACK);
		g.fillOval(x-15, y-15, 30, 30);
		repaint();

	}

	// 鼠標點擊
	// MouseEvent 事件對象
	public void mouseClicked(MouseEvent e) {
		// 獲取鼠標點擊的位置
		int x = e.getX();
		int y = e.getY();
		System.out.println("x:" + x + ",y:" + y);
		

	}
		//獲取鼠標移動位置賦給小球座標
	public void mouseMoved(MouseEvent e) {
		// TODO Auto-generated method stub
		x = e.getX();
		y = e.getY();
		
	}
	// 鼠標進入
	public void mouseEntered(MouseEvent e) {
		// TODO Auto-generated method stub

	}

	// 鼠標退出
	public void mouseExited(MouseEvent e) {
		// TODO Auto-generated method stub

	}

	// 鼠標按下
	public void mousePressed(MouseEvent e) {
		// TODO Auto-generated method stub

	}

	// 鼠標釋放
	public void mouseReleased(MouseEvent e) {
		// TODO Auto-generated method stub

	}
//	public boolean mouseMove(Event evt, int i, int j) {
//		// TODO Auto-generated method stub
//		return super.mouseMove(evt, i, j);
//	}

	public void mouseDragged(MouseEvent e) {
		// TODO Auto-generated method stub
		
		
	}

	

}