testcheckgroup.java

这是一张java应用教程的随书光盘

import java.applet.*;
import java.awt.*; 
public class Testcheckgroup extends Applet
{ Mypanel1 panel1;Mypanel2 panel2;
  public void init()
  { setLayout(new GridLayout(2,2));
    panel1=new Mypanel1();
    panel2=new Mypanel2();
    add(new Label("性别" ));add(panel1); 
    add(new Label("最高学历"));add(panel2);
  }
}  
class Mypanel1 extends Panel 
{ Checkbox box1,box2,box3;CheckboxGroup sex;   
   Mypanel1() 
  {sex=new CheckboxGroup();
   box1=new Checkbox("男",false,sex);
   box2=new Checkbox("女",false,sex); 
   add(box1);add(box2);
  }
}
class Mypanel2 extends Panel //扩展Panel类
{ Checkbox box1,box2,box3,box4;CheckboxGroup education;
  
  { setLayout(new GridLayout(2,2));
   education=new CheckboxGroup();
   box1=new Checkbox("高中",education,false);
   box2=new Checkbox("大学",education,false); 
   box3=new Checkbox("硕士",education,false);
   box4=new Checkbox("博士",education,true); 
   add(box1);add(box2);add(box3);add(box4);
  }
}