如何在同一行中显示两个单选按钮?

我是Java的初学者。我的任务是创建一个Java窗口,任何用户都可以在其中输入个人数据(姓名、姓氏、性别等),然后单击提交按钮。

为了创建这样的窗口,我添加了 BorderLayout 和四个面板,使用 GridLayout 。我的程序的主要问题是,我无法将两个单选按钮放在同一行中,这使我陷入困境。我试过两者都用 网格布局 和 TableLayout 内部a JPanel 没有成功地解决这个问题。

这是它的外观截图:

如图所示,“F”单选按钮应置于“M”单选按钮旁边,而不是下方。

这是我的代码:

import java.awt.*;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import javax.swing.*;
import javax.swing.border.EmptyBorder;

public class Finestra extends JFrame

{

public Finestra ()

{
    super("Dati Utente");
    this.setBounds(300,50,400,500);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container c = getContentPane();
    c.setLayout(new BorderLayout());

    Panel panel1 = new Panel (new GridLayout(1,1));
    Panel panel2 = new Panel (new GridLayout(1,1));
    Panel panel3 = new Panel (new GridLayout(5,1));
    Panel panel4 = new Panel (new GridLayout(5,1));

    panel1.setPreferredSize(new Dimension(100,50));
    panel2.setPreferredSize(new Dimension(100,50));
    panel3.setPreferredSize(new Dimension (100,200));
    panel4.setPreferredSize(new Dimension (260,200));

    c.add(panel1, BorderLayout.NORTH);
    c.add(panel2, BorderLayout.SOUTH);
    c.add(panel3, BorderLayout.WEST);
    c.add(panel4, BorderLayout.EAST);

    JLabel label1 = new JLabel ("Personal Data");
    label1.setHorizontalAlignment(SwingConstants.CENTER);
    label1.setFont(new Font ("Open Sans",Font.BOLD,20));
    panel1.add(label1);

    JLabel label2 = new JLabel ("Name");
    label2.setFont(new Font ("Open Sans", Font.PLAIN,14));
    label2.setBorder(new EmptyBorder(0,15,0,0));

    JLabel label3 = new JLabel ("Last Name");
    label3.setFont(new Font ("Open Sans", Font.PLAIN,14));
    label3.setBorder(new EmptyBorder(0,15,0,0));

    JLabel label4 = new JLabel ("Gender");
    label4.setFont(new Font ("Open Sans", Font.PLAIN,14));
    label4.setBorder(new EmptyBorder(0,15,0,0));

    JLabel label5 = new JLabel ("Hobby");
    label5.setFont(new Font ("Open Sans", Font.PLAIN,14));
    label5.setBorder(new EmptyBorder(0,15,0,0));

    JLabel label6 = new JLabel ("Nationality");
    label6.setFont(new Font ("Open Sans", Font.PLAIN,14));
    label6.setBorder(new EmptyBorder(0,15,0,0));

    panel3.add(label2);
    panel3.add(label3);
    panel3.add(label4);
    panel3.add(label5);
    panel3.add(label6);

    JTextField f1 = new JTextField();
    JTextField f2 = new JTextField();

    f1.setPreferredSize(new Dimension(180,30));
    f2.setPreferredSize(new Dimension(180,30));

    JPanel fp1 = new JPanel (), fp2 = new JPanel ();

    fp1.setBorder(new EmptyBorder(15,0,0,0));
    fp2.setBorder(new EmptyBorder(15,0,0,0));

    fp1.add(f1);
    fp2.add(f2);

    panel4.add(fp1);
    panel4.add(fp2);


    JRadioButton button1 = new JRadioButton("M"),button2 = new JRadioButton(("F"));


    button1.setHorizontalAlignment(SwingConstants.CENTER);  button2.setHorizontalAlignment(SwingConstants.CENTER);

    ButtonGroup bgroup1 = new ButtonGroup();

    bgroup1.add(button1); bgroup1.add(button2);

    panel4.add(button1); panel4.add(button2);


    setVisible(true);
}

如何在同一行中显示两个单选按钮?