java - 如何显示JRadioButton的数组文本

Question

我用谷歌搜索了好几次，但找不到答案。我有一个初始化的 JRadioButton 数组。每当单击单选按钮并且用户单击“确定”按钮时，我想显示 JRadioButton 的初始化值。目前我的 JOptionPane 仅显示内存地址。但包含数组的元素意味着它无法编译。错误是“没有找到适合 toString(jradiobutton) 的方法。请有人指出我正确的方向吗？我是新手。

代码片段在这里:

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

改变这个

JOptionPane.showMessageDialog(f3,"您选择了:"+ Arrays.toString(rb[0]));

至

JOptionPane.showMessageDialog(f3,"您选择了:"+ rb[0].getText());

这应该检索JRadioButton的文本而不是“内存地址”。