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？
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);
}
});
}
} |
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