twolisten.java

来自「有关java的源程序,为讲授java程序设计课程使用」· Java 代码 · 共 131 行

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

public class TwoListen implements MouseMotionListener,MouseListener,WindowListener
{
	private Frame f;
	private TextField tf;
	MouseListenerAdapter mouseAdapter;
	MouseMotionListenerAdapter mouseMotionAdapter;
	WindowListenerAdapter windowAdapter;
	public static void main(String args[])
	{
		TwoListen two=new TwoListen();
		two.go();
	}
	public void go()
	{
		f=new Frame("Two Listeners Examples");
		f.add(new Label("Click and drag the mouse"),"North");
		tf=new TextField(30);
		f.add(tf,"South");
		
//		f.addMouseMotionListener(this);
		mouseMotionAdapter=new MouseMotionListenerAdapter(tf);
		f.addMouseMotionListener(mouseMotionAdapter);
		
//		f.addMouseListener(this);
		mouseAdapter=new MouseListenerAdapter(tf);;
		f.addMouseListener(mouseAdapter);
		
//		f.addWindowListener(this);
		windowAdapter=new WindowListenerAdapter();
		f.addWindowListener(windowAdapter);
		f.setSize(300,200);
		f.setVisible(true);
	}
	public void mouseDragged(MouseEvent e)
	{
		String s="Mouse Drag:X="+e.getX()+"Y="+e.getY();
		tf.setText(s);
	}
	public void mouseMoved(MouseEvent e)
	{
	}
	public void mouseClicked(MouseEvent e)
	{
	}
	public void mouseEntered(MouseEvent e)
	{
		String s="The Mouse entered";
		tf.setText(s);
	}
	public void mouseExited(MouseEvent e)
	{
		String s="The Mouse Exit";
		tf.setText(s);
	}
	public void mousePressed(MouseEvent e)
	{
	}
	public void mouseReleased(MouseEvent e)
	{
	}
	public void windowClosing(WindowEvent e)
	{
		System.exit(1);	
	}
 	public void windowOpened(WindowEvent e)
 	{
	}
        public void windowIconified(WindowEvent e)
 	{
	}
	public void windowDeiconified(WindowEvent e)
 	{
	}
	public void windowClosed(WindowEvent e)
 	{
	}
	public void windowActivated(WindowEvent e)
 	{
	}
	public void windowDeactivated(WindowEvent e)
 	{
	}
	
}

class MouseListenerAdapter extends MouseAdapter
{
	private TextField textField;
	MouseListenerAdapter(TextField tf)
	{
		textField=tf;	
	}
	public void mouseEntered(MouseEvent e)
	{
		String s="The Mouse entered(Use Adapter)";
		textField.setText(s);
	}
	public void mouseExited(MouseEvent e)
	{
		String s="The Mouse Exit(Use Adapter)";
		textField.setText(s);
	}
		
}
class MouseMotionListenerAdapter extends MouseMotionAdapter
{
	private TextField textField;
	MouseMotionListenerAdapter(TextField tf)
	{
		textField=tf;	
	}

	public void mouseDragged(MouseEvent e)
	{
		String s="Mouse Drag(Adapter):X="+e.getX()+"Y="+e.getY();
		textField.setText(s);
	}

} 

class WindowListenerAdapter extends WindowAdapter
{
	public void windowClosing(WindowEvent e)
	{
		System.exit(1);	
	}

}