checkdemo.java

金旭亮的java教案

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

public class CheckDemo {

    static JFrame jframe = new JFrame("Example");

    public static void setupjframe() {
        jframe.setSize(400,100);
        jframe.setVisible(true);
        jframe.getContentPane().setLayout( new FlowLayout() );

        WindowListener l = new WindowAdapter() {
            public void windowClosing(WindowEvent e) {System.exit(0);}
        };
        jframe.addWindowListener(l);
    }

    public static void main(String[] args) {
        setupjframe();

        JCheckBox jck1 = new JCheckBox("Pepperoni");
        JCheckBox jck2 = new JCheckBox("Mushroom");
        JCheckBox jck3 = new JCheckBox("Black olives");
        JCheckBox jck4 = new JCheckBox("Tomato");

        jck1.addActionListener( new ActionListener() {
                public void actionPerformed(ActionEvent e) 
                {  System.out.println("event = " + e); }
              } );

        jck2.addItemListener( new ItemListener() {
                public void itemStateChanged(ItemEvent e) 
                {  if (e.getStateChange()==e.SELECTED)
                        System.out.print("selected ");
                   else System.out.print("de-selected ");对
                   System.out.print("Mushroom\n");
               } } );

        Container c = jframe.getContentPane();
        c.add( jck1 );
        c.add( jck2 );
        c.add( jck3 );
        c.add( jck4 );
    }
}