buttonframe.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 javax.swing.*;
import java.awt.event.*;
public class ButtonFrame  extends JFrame implements ActionListener  {
    private Timer theTimer;
    
	/** post:   theTimer == t  */
    public ButtonFrame(Timer t)  {
    	super("");
        setBounds(100, 100, 200, 80);
        setVisible(true);
        setLayout(null);
        JButton btn = new JButton("Start Sunrise");
        btn.setBounds(10, 10, 180, 30);
        btn.addActionListener(this);
        add(btn, 0);
        repaint();
        theTimer = t;
    }

	public void actionPerformed( ActionEvent e )   {
        theTimer.start( );
	}
}