checkbox.java

由于想一次上传成功 所以将二个教程打包成了一个 这些例子几乎包含了所有java的框架集合

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

/*
<APPLET
    CODE=checkbox.class
    WIDTH=340
    HEIGHT=200 >
</APPLET>
*/

public class checkbox extends JApplet implements ItemListener
{
    JCheckBox check1, check2, check3, check4;
    JTextField text;

    public void init() 
    {
        Container contentPane = getContentPane();
        contentPane.setLayout(new FlowLayout());

        check1 = new JCheckBox("Check 1");
        check2 = new JCheckBox("Check 2");
        check3 = new JCheckBox("Check 3");
        check4 = new JCheckBox("Check 4");

        check1.addItemListener(this);
        check2.addItemListener(this);
        check3.addItemListener(this);
        check4.addItemListener(this);

        contentPane.add(check1);
        contentPane.add(check2);
        contentPane.add(check3);
        contentPane.add(check4);

        text = new JTextField(20);

        contentPane.add(text); 
    }

    public void itemStateChanged(ItemEvent e)
    {
        if (e.getItemSelectable() == check1) {
            text.setText("You clicked check box 1.");
        } else if (e.getItemSelectable() == check2) {
            text.setText("You clicked check box 2.");
        } else if (e.getItemSelectable() == check3) {
            text.setText("You clicked check box 3.");
        } else if (e.getItemSelectable() == check4) {
            text.setText("You clicked check box 4.");
        }
    }
}