nestedpanels.java

JAVA程序编码 JAVA课本代码第三章原代码

//********************************************************************
//  NestedPanels.java       Author: Lewis/Loftus
//
//  Demonstrates a basic componenet hierarchy.
//********************************************************************

import java.awt.*;
import javax.swing.*;

public class NestedPanels
{
   //-----------------------------------------------------------------
   //  Presents two colored panels nested within a third.
   //-----------------------------------------------------------------
   public static void main (String[] args)
   {
      JFrame frame = new JFrame ("Nested Panels");
      frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);

      // Set up first subpanel
      JPanel subPanel1 = new JPanel();
      subPanel1.setPreferredSize (new Dimension(150, 100));
      subPanel1.setBackground (Color.green);
      JLabel label1 = new JLabel ("One");
      subPanel1.add (label1);

      // Set up second subpanel
      JPanel subPanel2 = new JPanel();
      subPanel2.setPreferredSize (new Dimension(150, 100));
      subPanel2.setBackground (Color.red);
      JLabel label2 = new JLabel ("Two");
      subPanel2.add (label2);

      // Set up primary panel
      JPanel primary = new JPanel();
      primary.setBackground (Color.blue);
      primary.add (subPanel1);
      primary.add (subPanel2);

      frame.getContentPane().add(primary);
      frame.pack();
      frame.setVisible(true);
   }
}