buttondemo.java~41~

来自「提供了常用的JAVA技术的示例」· JAVA~41~ 代码 · 共 70 行

package ButtonDemo;

import java.awt.*;
import java.awt.event.*;
import javax.swing.AbstractButton;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.ImageIcon;

public class ButtonDemo extends JPanel implements ActionListener{
    protected JButton b1,b2,b3;

    public ButtonDemo() {
        ImageIcon leftIcon=new ImageIcon("image/right.gif");
        ImageIcon rightIcon=new ImageIcon("image/left.gif");
        ImageIcon middleIcon=new ImageIcon("image/coreIcon.gif");

        b1=new JButton("press me to disable button2",leftIcon);
        b1.setVerticalTextPosition(AbstractButton.CENTER);
        b1.setHorizontalTextPosition(AbstractButton.LEFT);
        b1.setActionCommand("disable");

        b2=new JButton("button2",middleIcon);
        b2.setVerticalTextPosition(AbstractButton.CENTER);
        b2.setHorizontalTextPosition(AbstractButton.LEFT);

        b3=new JButton("press me to enable button2",rightIcon);
        b3.setActionCommand("enable");
        b3.setEnabled(false);

        b1.addActionListener(this);
        b3.addActionListener(this);

        b1.setToolTipText("    click this button to disable the middle button .");
        b2.setToolTipText("    this middle button does nothing .");
        b3.setToolTipText("    click this button to enable the middle button.");

        add(b1);
        add(b2);
        add(b3);
    }

    public void actionPerformed(ActionEvent e){
        if(e.getActionCommand().equals("disable")){
            b1.setEnabled(true);
            b2.setEnabled(false);
            b3.setEnabled(true);
        }else{
            b1.setEnabled(true);
            b2.setEnabled(true);
            b3.setEnabled(true);
        }
    }
    public static void main(String[] args) {
      ButtonDemo buttonDemo1 = new ButtonDemo();
      JFrame frame=new JFrame("buttondemo");
      frame.getContentPane().add(buttonDemo1,BorderLayout.CENTER);
      frame.pack();
      frame.setVisible(true);

      frame.addWindowListener(new WindowAdapter(){
          public void windowClosing(WindowEvent e){
            System.out.print("dkfjdkldkl");
            System.exit(0);
          }
      });

    }
}