java图形界面——复选框与单选按钮

/* * 调查窗口 */package com.test.swing;import java.awt.*;import javax.swing.*;public class Test2 extends JFrame{//定义组件JPanel jp1, jp2, jp3;JLabel jl1, jl2;JCheckBox jcb1, jcb2, jcb3;//复选框JRadioButton jrb1, jrb2;//单选按钮ButtonGroup bg;JButton jb1, jb2;public static void main(String[] args) {Test2 test = new Test2();}//构造函数public Test2(){//创建组件jp1 = new JPanel();jp2 = new JPanel();jp3 = new JPanel();jl1 = new JLabel("你喜欢的运动：");jl2 = new JLabel("你的性别：");jcb1 = new JCheckBox("瑜伽");jcb2 = new JCheckBox("足球");jcb3 = new JCheckBox("跑步");jrb1 = new JRadioButton("男");jrb2 = new JRadioButton("女");//将单选按键加入ButtonGroup,否则可以多选bg = new ButtonGroup();bg.add(jrb1);bg.add(jrb2);jb1 = new JButton("注册");jb2 = new JButton("取消");//设置布局管理this.setLayout(new GridLayout(3, 1));//添加组件jp1.add(jl1);jp1.add(jcb1);jp1.add(jcb2);jp1.add(jcb3);jp2.add(jl2);jp2.add(jrb1);jp2.add(jrb2);jp3.add(jb1);jp3.add(jb2);this.add(jp1);this.add(jp2);this.add(jp3);this.setSize(300, 150);//设置窗体大小this.setResizable(false);//固定窗体大小this.setVisible(true);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}}