如何在JFrame上組織單選按鈕？

Question

在下面的代碼中，我無法將界面組織得看起來像所附的照片。 我已經嘗試了網格和流布局，但無法解決該問題。

        package app;
        import javax.swing.*;
        import java.awt.*;

        public class app{
        JFrame f1;
        JButton buttton_1,buttton_2;
        JLabel label_1,label_2;
        JRadioButton radio_1,radio_2,radio_3,radio_4,radio_5,radio_6,radio_7;

         app(){

        JFrame f1 = new JFrame ("MathTest - Main Menu");
        f1.setVisible(true);
        f1.setSize(500,500);
        f1.setLayout(new GridLayout(0,1));
        f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


        label_1 =new JLabel("select test type ");
        radio_1=new  JRadioButton("addition ");
        radio_2=new  JRadioButton("subtraction");
        radio_3=new  JRadioButton("mulitipcation");
        radio_4=new  JRadioButton("division");

        label_2 =new JLabel("select a diffculty level");
        radio_5=new  JRadioButton("easy ");
        radio_6=new  JRadioButton("moderate");
        radio_7=new  JRadioButton("hard");

        buttton_1=new JButton("start test");              
        buttton_2=new JButton("exit");

        f1.add(label_1); 
        f1.add(radio_1);
        f1.add(radio_2);
        f1.add(radio_3); 
        f1.add(radio_4); 

        f1.add(label_2);
        f1.add(radio_5);
        f1.add(radio_6); 
        f1.add(radio_7);
        f1.add(buttton_1); 
        f1.add(buttton_2);   

        }

        public static void main(String[] args)
        {
            app xyz =new app();
        }
        }

Answer 1

在不為您做全部事情的情況下，您可以通過以下方法實現單選按鈕面板之一：

JPanel typePanel = new JPanel(new GridLayout(0, 2));
typePanel.setBorder(BorderFactory.createLineBorder(Color.black, 1));
typePanel.add(new JLabel("Select a test type"));
typePanel.add(new JRadioButton("Addition"));
typePanel.add(new JLabel(""));
typePanel.add(new JRadioButton("Substraction"));
typePanel.add(new JLabel(""));
typePanel.add(new JRadioButton("Multiplication"));
typePanel.add(new JLabel(""));
typePanel.add(new JRadioButton("Division"));

對於底部的按鈕，請記住，可以設置流布局以使右側的內容與構造函數對齊：

new FlowLayout(FlowLayout.RIGHT)