如何顯示JRadioButton的數組文本

Question

我已經GOOGLE了這幾次，找不到答案。我有一個初始化的JRadioButton數組。我想顯示JRadioButton的初始化值，每當單擊單選按鈕時，用戶單擊我的「確定」按鈕。目前我的JOptionPane只顯示一個內存地址。但包括數組的元素意味着它不會編譯。 ？錯誤是「發現的toString（一個JRadioButton）沒有合適的方法請可有人點我在正確的方向，我對於新手

代碼片段是在這裏：。

import java.awt.event.*; 
import javax.swing.*; 
import javax.swing.JOptionPane; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import java.util.Arrays; 

public class NewGameGUI implements ActionListener 
{ 
    private JRadioButton[] rb = new JRadioButton[20]; 
    JFrame f3; 
    JButton b; 
    JLabel label1; 
    public NewGameGUI() 
    { 
     label1 = new JLabel("Please choose a team"); 
     f3 = new JFrame("Ballon d'or"); 
     f3.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     rb[0] = new JRadioButton("Arsenal"); 
     rb[1] = new JRadioButton("Aston Villa"); 
     rb[2] = new JRadioButton("Bournemouth"); 
     rb[3] = new JRadioButton("Chelsea"); 
     rb[4] = new JRadioButton("Crystal Palace"); 
     rb[5] = new JRadioButton("Everton"); 
     rb[6] = new JRadioButton("Leicester City"); 
     rb[7] = new JRadioButton("Liverpool"); 
     rb[8] = new JRadioButton("Manchester United"); 
     rb[9] = new JRadioButton("Manchester City"); 
     rb[10] = new JRadioButton("Newcastle United"); 
     rb[11] = new JRadioButton("Norwich City"); 
     rb[12] = new JRadioButton("Southampton"); 
     rb[13] = new JRadioButton("Stoke City"); 
     rb[14] = new JRadioButton("Sunderland"); 
     rb[15] = new JRadioButton("Swansea City"); 
     rb[16] = new JRadioButton("Tottenham Hotspur"); 
     rb[17] = new JRadioButton("Watford"); 
     rb[18] = new JRadioButton("West Brom"); 
     rb[19] = new JRadioButton("West Ham"); 


     label1.setBounds(50,25,200,30); 
     f3.add(label1); 

     rb[0].setBounds(50,100,170,30); 
     rb[1].setBounds(50,150,170,30); 
     rb[2].setBounds(50,200,170,30); 

     ButtonGroup bg=new ButtonGroup(); 
     bg.add(rb[0]); 
     bg.add(rb[1]); 
     bg.add(rb[2]); 
     bg.add(rb[3]); 
     bg.add(rb[4]); 
     bg.add(rb[5]); 
     bg.add(rb[6]); 
     bg.add(rb[7]); 
     bg.add(rb[8]); 
     bg.add(rb[9]); 
     bg.add(rb[10]); 
     bg.add(rb[11]); 
     bg.add(rb[12]); 
     bg.add(rb[13]); 
     bg.add(rb[14]); 
     bg.add(rb[15]); 
     bg.add(rb[16]); 
     bg.add(rb[17]); 
     bg.add(rb[18]); 
     bg.add(rb[19]); 

     b = new JButton("OK"); 
     b.setBounds(200,250,180,30); 
     b.addActionListener(this); 
     f3.add(rb[0]); 
     f3.add(rb[1]); 
     f3.add(rb[2]); 
     f3.add(rb[3]); 
     f3.add(rb[4]); 
     f3.add(rb[5]); 
     f3.add(rb[6]); 
     f3.add(rb[7]); 
     f3.add(rb[8]); 
     f3.add(rb[9]); 
     f3.add(rb[10]); 
     f3.add(rb[11]); 
     f3.add(rb[12]); 
     f3.add(rb[13]); 
     f3.add(rb[14]); 
     f3.add(rb[15]); 
     f3.add(rb[16]); 
     f3.add(rb[17]); 
     f3.add(rb[18]); 
     f3.add(rb[19]); 
     f3.add(b); 


     f3.setSize(500,500); 
     f3.setLayout(null); 
     f3.setVisible(true); 

     // NewGameGUI test = new NewGameGUI();   
     // test.setFrame(f3); 

    } 

    public void setFrame(JFrame f3){ 
     this.f3 = f3; 
    } 
    public JFrame getFrame(){ 

    return f3; 
    } 
      public void actionPerformed(ActionEvent e) 
      { 
       if(rb[0].isSelected()) 
       { 
        // f3.dispose(); 
        f3.dispose(); 

        JOptionPane.showMessageDialog(f3,"You chose : " + Arrays.toString(rb[0])); 
       } 
       if(rb[1].isSelected()) 
       { 
        JOptionPane.showMessageDialog(f3,"This works too!"); 
       } 
       if(rb[2].isSelected()) 
       { 
        System.exit(0); 
       } 

      } 


} 

Answer 1

更改此

JOptionPane.showMessageDialog(f3,"You chose : " + Arrays.toString(rb[0]));

到

JOptionPane.showMessageDialog(f3,"You chose : " + rb[0].getText());

這應該檢索JRadioButton的文本而不是「內存地址」。