driver.java

Java程序设计(美) David D. Riley著 机械工业出版社 书籍配套 代码

import java.awt.event.*;
import javax.swing.*;

/** Example of event delegation with 2 buttons   (Figure 9.32)
 * Author: David Riley
 * Date: January, 2005
 */
public class Driver implements ActionListener {
    private JFrame  window;
	private JButton simpleButton, anotherButton;

	/**	post:	window is created at (10, 10) with width and height of 200
	 *			and  simpleButton is added to window
 	 *			and  anotherButton is added to window 
	 */
	public Driver()  {
		window = new JFrame("Two Buttons");
		window.setBounds(10, 10, 200, 200);
		window.setVisible(true);
		window.setLayout(null);
		simpleButton = new JButton("Click Me");
		simpleButton.setBounds(50, 20, 100, 40);
		simpleButton.addActionListener( this );
		window.add( simpleButton, 0 );
		anotherButton = new JButton("Clack Me");
		anotherButton.setBounds(50, 80, 100, 40);
		anotherButton.addActionListener( this );
		window.add( anotherButton, 0 );
		window.repaint();
    }
    
	/**	post:	simpleButton clicked implies  CLICKED was output
	 *			and anotherButton clicked implies CLACKED was output 
	 */
	public  void  actionPerformed( ActionEvent e )   {
        if (e.getSource() == simpleButton)
            System.out.println( "CLICKED" );
        else
            System.out.println( "CLACKED" );        
	}
}