import?javax.swing.*;
import?java.awt.*;
import?java.awt.event.*;
import?java.awt.geom.Ellipse2D;
import?java.awt.geom.Point2D;

public?class?CircleTest?{
	public?static?void?main（String[]args）{????//設置可見窗體
		Buttonframe?f?=?new?Buttonframe（）;
		f.setDefaultCloseOperation（Jframe.EXIT_ON_CLOSE）;
		f.setVisible（true）;
	}
}
class?Buttonframe?extends?Jframe{
	public?Buttonframe（）{??//面板加入窗體當中
		this.settitle（“Button?Window“）;
		this.setSize（DEFAULT_WIDTH?DEFAULT_HEIGHT）;
		this.add（new?ButtonPanel（））;
	}
	public?static?final?int?DEFAULT_WIDTH?=?400;
	public?static?final?int?DEFAULT_HEIGHT?=?300;
}

class?ButtonPanel?extends?JPanel{
	private?Ellipse2D?yuan;
	private?Color?ecolor=getBackground（）;
	private?Color[]?colors={getBackground（）Color.yellowColor.redColor.green};

	?public?void?init（）{
	???new?Thread（）.start（）;
	??}
	
	public?ButtonPanel（）{
		//用標簽字符串構造按鈕;
		JButton?b1?=?new?JButton（“Yellow“）;
		JButton?b2?=?new?JButton（“Red“）;
		JButton?b3?=?new?JButton（“Green“）;

		this.add（b1）;//將按鈕添加到面板上
		this.add（b2）;
		this.add（b3）;
		//用適當顏色構造監聽器對象
		ColorAction?a1?=?new?ColorAction（Color.YELLOW）;
		ColorAction?a2?=?new?ColorAction（Color.RED）;
		ColorAction?a3?=?new?ColorAction（Color.GREEN）;
		
		MouseHandler?x?=?new?MouseHandler（）;
		MouseMotionHandler?moh?=?new?MouseMotionHandler（）;
		
		/*eventSourceobject.addEventListener（eventListenerobject）;
?????????//把對象注冊到事件源上*/
		b1.addActionListener（a1）;//把action與Button連接上???????將監聽器對象注冊到組件
		b2.addActionListener（a2）;
		b3.addActionListener（a3）;?
		
		this.addMouseMotionListener（moh）;//監聽鼠標移動事件
		this.addMouseListener（x）;
	}
	
	public?void?paintComponent（Graphics?g）