代码如下，求大神解答，关于gui布局的，程序运行没出现任何东西？

Question

public class text_BJ extends Panel {

 private Panel panel1 = new Panel();
 private Panel panel2 = new Panel();

 public void text_BJ() {
  
  Checkbox checkbox1, checkbox2;
  CheckboxGroup a = new CheckboxGroup();
  checkbox1 = new Checkbox("普通", true, a);
  checkbox2 = new Checkbox("障碍", false, a);
  
  TextField textField1;
  textField1 = new TextField(10);
  
  panel1.setLayout(new GridLayout(1, 2));
  panel1.add(new Label("请输入用户名："));
  panel1.add(textField1);

  panel2.setLayout(new GridLayout(1, 3));
  panel2.add(new Label("请选择游戏模式："));
  panel2.add(checkbox1);
  panel2.add(checkbox2);

  setLayout(new GridBagLayout());
  GridBagConstraints c = new GridBagConstraints();

  c.gridx = 0;
  c.gridy = 0;
  add(panel1, c);

  c.gridy = 1;
  add(panel2, c);
 }

 public static void main(String[] args) throws InterruptedException {
  Frame frame = new Frame("德玛西亚");
  frame.add(new text_BJ());
  frame.pack();
  frame.setVisible(true);
  frame.addWindowListener(new WindowAdapter() {
   public void windowClosing(WindowEvent e) {
    System.exit(0);
   }
  });

 }

}

Answer 1

你是不是没有把面板放在框架上？