向框架添加容器.txt

此文件为自己自学JAVA时调试通过的JAVA程序范例

import javax.swing.*;
import java.awt.*;
class FrameTest extends JFrame
{
 public FrameTest()
  {
    super("窗体标题");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setVisible(true);
    setSize(500,500);
  }
}


class PanelTest extends FrameTest
{
 JPanel panel1;
 public PanelTest()
  {
   panel1=new JPanel();
   panel1.setBackground(Color.white);
   getContentPane().add(panel1);
  }
}

class ButtonTest extends PanelTest
{
 JButton Button1;
 JButton Button2;
 public ButtonTest()
  {
    Button1=new JButton("左按扭");
    Button2=new JButton("右按扭");  
    panel1.add(Button1);
    panel1.add(Button2);
  }
}
    
public class Frame4
{
 public static void main(String[] args)
  {
   new ButtonTest();
  }
}