Swing如何創建單選按鈕組？

下麵的示例展示了如何在Java Swing應用程式中的組中使用標準單選按鈕。

使用以下API -

• ButtonGroup() - 創建按鈕組。
• ButtonGroup.add(); - 向組中添加單選按鈕。

示例

package com.zaixian.swingdemo;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

import javax.swing.ButtonGroup;
import javax.swing.JRadioButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

public class SwingTester {
   public static void main(String[] args) {
      createWindow();
   }

   private static void createWindow() {
      JFrame frame = new JFrame("Swing創建單選按鈕組(xuhuhu.com)");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      createUI(frame);
      frame.setSize(560, 200);
      frame.setLocationRelativeTo(null);
      frame.setVisible(true);
   }

   private static void createUI(final JFrame frame){
      JPanel panel = new JPanel();
      LayoutManager layout = new FlowLayout();
      panel.setLayout(layout);

      JRadioButton radioButton1 = new JRadioButton("Java/Swing");
      JRadioButton radioButton2 = new JRadioButton("Python");
      JRadioButton radioButton3 = new JRadioButton("Oracle");

      ButtonGroup group = new ButtonGroup();
      group.add(radioButton1);
      group.add(radioButton2);
      group.add(radioButton3);

      panel.add(radioButton1);
      panel.add(radioButton2);
      panel.add(radioButton3);
      frame.getContentPane().add(panel, BorderLayout.CENTER);
   }
}

執行上面示例代碼，得到以下結果：