如何在Java GUI swing中设置布局？

Question

我正在尝试为我的应用程序（学校项目）创建注册表，我想将布局设置为BoxLayout，但是Jtextfields和组合框有问题，如下所示，此问题与setSize()还是我做错了什么，我只想Jtextfields垂直排序，感谢支持

private JPanel SetUpRegister() {
        JLabel registerLabel = new JLabel("Registera");

        registerLabel.setFont(new Font("Arial", Font.BOLD, 30));
        loginRegisterInput = new JTextField(INPUT_FIELD_WIDTH);
        passwordRegisterInput = new JTextField(INPUT_FIELD_WIDTH);
        fnRegisterInput = new JTextField(INPUT_FIELD_WIDTH);
        lnRegisterInput = new JTextField(INPUT_FIELD_WIDTH);
        ageRegisterInput = new JTextField(INPUT_FIELD_WIDTH);
        String[] genderlist = new String[] { "Male", "Female", "Other" };
        JComboBox<String> registerList = new JComboBox<>(genderlist);

        JPanel registerPanel = new JPanel();    
        registerPanel.setBackground(new Color(255, 140, 0));
        registerPanel.add(registerLabel);
        registerPanel.add(loginRegisterInput);
        registerPanel.add(passwordRegisterInput);
        registerPanel.add(fnRegisterInput);
        registerPanel.add(lnRegisterInput);
        registerPanel.add(ageRegisterInput);
        registerPanel.add(registerList);
        registerPanel.setLayout(new BoxLayout(registerPanel,BoxLayout.Y_AXIS));

        return registerPanel;

}

Answer 1

输入字段很大