窗体如何不显示添加的组件，大家帮忙看看
窗体怎么不显示添加的组件，大家帮忙看看！
------解决方案--------------------
或者
- Java code
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TestButton {
public static void main(String[] args) {
ButtonFrame frame = new ButtonFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(150,100);
frame.setResizable(false);
frame.setVisible(true);
}
}
class ButtonFrame extends JFrame{
public ButtonFrame(){
setTitle("test button");
ButtonPanel panel = new ButtonPanel();
add(panel);
//pack();
}
}
class ButtonPanel extends JPanel{
public ButtonPanel(){
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(2,1));
panel.add(new JButton("1"));
panel.add(new JButton("2"));[color=#FF0000]//添加的button怎么不显示？[/color]
}
}
------解决方案--------------------
或者
- Java code
;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TestButton {
public static void main(String[] args) {
ButtonFrame frame = new ButtonFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(150, 100);
frame.setResizable(false);
frame.setVisible(true);
}
}
class ButtonFrame extends JFrame {
public ButtonFrame() {
setTitle("test button");
ButtonPanel panel = new ButtonPanel();
add(panel);
}
}
class ButtonPanel extends JPanel {
public ButtonPanel() {
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(2, 1));
panel.add(new JButton("1"));
panel.add(new JButton("2"));//添加的button怎么不显示？[/color]
add(panel);
}
}