JAVA中怎样判断单选按钮和复选框是否选中

package helloworld;

import java.awt.*;

import javax.swing.*;
import com.borland.jbcl.layout.XYLayout;
import com.borland.jbcl.layout.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Frame1 extends JFrame {
XYLayout xYLayout1 = new XYLayout();
JLabel jLabel1 = new JLabel();
JRadioButton jRadioButton1 = new JRadioButton();
JRadioButton jRadioButton2 = new JRadioButton();
JButton jButton1 = new JButton();

public Frame1() {
try {
jbInit();
} catch (Exception exception) {
exception.printStackTrace();
}
}

private void jbInit() throws Exception {
getContentPane().setLayout(xYLayout1);
jLabel1.setText("性 别：");
xYLayout1.setWidth(326);
xYLayout1.setHeight(214);
jButton1.setText("提 交");
jButton1.addActionListener(new Frame1_jButton1_actionAdapter(this));
jRadioButton2.setText("女");
this.getContentPane().add(jButton1, new XYConstraints(124, 135, -1, -1));
this.getContentPane().add(jLabel1, new XYConstraints(49, 60, 46, 21));
this.getContentPane().add(jRadioButton1,
new XYConstraints(127, 60, -1, -1));
this.getContentPane().add(jRadioButton2,
new XYConstraints(216, 60, -1, -1));
jRadioButton1.setText("男");
}

public void jButton1_actionPerformed(ActionEvent e) {

}
}

class Frame1_jButton1_actionAdapter implements ActionListener {
private Frame1 adaptee;
Frame1_jButton1_actionAdapter(Frame1 adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.jButton1_actionPerformed(e);
}
}

追问：哪复选框怎么判断呢？

答案：测试代码如下：
import java.awt.FlowLayout;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JRadioButton;
public class JRadioButtonTest extends JFrame {
 private static final long serialVersionUID = 1L;
 private JLabel gender;
 private JRadioButton m;
 private JRadioButton f;
 private JButton ok;
 private JRadioButtonTest() throws HeadlessException {
  gender = new JLabel("Gender：");
  m = new JRadioButton("Male", true);
  f = new JRadioButton("Female");
  ok = new JButton("OK");
  init();
  eventHander();
  showFrame();
 }
//初始化
 private void init() {
  this.setTitle("JRadioButtonTest");
//单选按钮逻辑分组
  ButtonGroup bg = new ButtonGroup();
  bg.add(m);
  bg.add(f);
  this.setLayout(new FlowLayout());
  this.add(gender);
  this.add(m);
  this.add(f);
  this.add(ok);
  this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 }
//事件处理
 private void eventHander() {
  ok.addActionListener(new ActionListener() {
   public void actionPerformed(ActionEvent e) {
    System.out.println("you selected :"
      + (m.isSelected() ? "male" : "female"));
   }
  });
 }
//显示
 private void showFrame() {
  this.setSize(300, 80);
  this.setVisible(true);
 }
 public static void main(String args[]) {
  new JRadioButtonTest();
 }
}
 
说明：
1、单选按钮与ButtonGroup对象配合使用可创建一组按钮，一次只能选择其中的一个按钮。（创建一个 ButtonGroup 对象并用其 add 方法将 JRadioButton 对象包含在此组中）。ButtonGroup 对象为逻辑分组，不是物理分组。
2、单选按钮是类 AbstractButton的一个子类，方法isSelected() 返回按钮的状态。
 
请仔细阅读API，谢谢！
 
看运行结果不就知道了吗

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