complexlistener.java

来自「Java与面向对象程序设计实验教学讲义.复数类的实现,复数类的复杂运算,身份证号」· Java 代码 · 共 67 行

import java.awt.*;
import java.awt.event.*;

public class ComplexListener implements 
	    MouseMotionListener, MouseListener,ActionListener{
	Frame f;
	TextArea tf;
	Button bt;
	int number=1;
   
	
	public ComplexListener(){
		Label label=new Label("click and Drag the mouse");
		f=new Frame("Complex Listener");
		tf=new TextArea();
    	bt = new Button("退出");
	    
	    tf.addMouseMotionListener(this);
		tf.addMouseListener(this);   
	    bt.addActionListener(this);
	    
	    f.add(label,BorderLayout.NORTH);
	    f.add(tf,BorderLayout.CENTER);
	    f.add(bt,BorderLayout.SOUTH);		
		f.setSize(300,200);
		f.setVisible(true);
	}

	// MouseMotionListener 的方法。
	public void mouseDragged(MouseEvent e){ 
		String s = number+++" "+"The mouse Dragged: x= "+e.getX()+" y="+e.getY()+"\n";
		tf.append(s);
	}

	//MouseListener 的方法。
	public void mouseEntered(MouseEvent e){
		String s = number+++" "+"The mouse entered"+"\n";
		tf.append(s);
	}

	public void mouseClicked(MouseEvent e){ 
		String s = number+++" "+"The mouse clicked."+"\n";
		tf.append(s);
	}

	public void mouseExited(MouseEvent e){
		String s =number+++" "+ "The mouse exit."+"\n";
		tf.append(s);
	}

	// 未使用的 MouseMotionListener 方法。.
	public void mouseMoved(MouseEvent e){ }

	// 未使用的 MouseListener 方法。
	public void mouseReleased(MouseEvent e){ }
	public void mousePressed(MouseEvent e){ }
	
	//ActionListener的方法。
	public void actionPerformed(ActionEvent e){
		System.exit(0);
	}

	public static void main(String args[]){
		ComplexListener two = new ComplexListener( );
	}
}