multilistener1.java

这是一个java程序

/******************************************
*         class MultiListener1(version 1.1)
*******************************************/
import java.awt.*;
import java.awt.event.*;

public class MultiListener1
{
	private Frame f;
	private TextField tf;

	public static void main(String args[])
	{
		MultiListener ml = new MultiListener();
		ml.go();
	}
	public void go()
	{
		Frame f = new Frame("MultiListener Test 1.1");
		f.add( new Label("Click and Drag the mouse"), "North" );
		tf = new TextField(30);
		f.add( tf, "South");

		//同时监听容器f上发生的多种事件
		f.addMouseListener( new MouseAdapter(){
			public void mouseEntered(MouseEvent e)
			{
				String s = "The mouse Entered";
				tf.setText(s);
			}
			public void mouseExited(MouseEvent e)
			{
				String s = "The mouse Exited";
				tf.setText(s);
			}
		});

		f.addMouseMotionListener( new MouseMotionAdapter(){
			public void mouseDragged(MouseEvent e)
			{
				//通过事件获得其详细信息
				String s = "Mouse dragging : X = " + e.getX() + " Y = " + e.getY();
				tf.setText(s);
			}
		});
		
		f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e)
			{
                System.exit(0);
            }
        });

		f.resize(200,200);
		f.show();
	}
}