JLayeredPane中是否能够插入不同Layer的Container？

Question

all way as follows:JLayeredPanel jLP = new JLayeredPanel();
JPanel jP = new JPanel();jLP.add(jP);

Answer 1

但是我这么做了以后再设置JPanel的背景为红色执行的时候JPanel没有显示出来阿

Answer 2

我觉的是应该在JPANEL上再插入象JLABEL，LBUTTON之类。
JPANEL显示出来能看到吗？

Answer 3

应该是可以的阿,JPanel、JScrollPanel都是组件阿是不是他们被遮盖掉了？

Answer 4

package test1;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.borland.jbcl.layout.*;
/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */public class Frame4
  extends JFrame
{
  JPanel contentPane;  BorderLayout borderLayout1 = new BorderLayout();  JLayeredPane jLayeredPane1 = new JLayeredPane();
  JPanel jPanel1 = new JPanel();
  JPanel jPanel2 = new JPanel();
  XYLayout xYLayout1 = new XYLayout();  //Construct the frame  public Frame4()
  {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try
    {
      jbInit();
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }  //Component initialization
  private void jbInit()
    throws Exception
  {
    contentPane = (JPanel)this.getContentPane();
    contentPane.setBackground(SystemColor.info);
    contentPane.setDebugGraphicsOptions(0);
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(400, 300));
    this.setTitle("Frame Title");
    jLayeredPane1.setBackground(Color.red);
    jLayeredPane1.setOpaque(true);
    jLayeredPane1.setLayout(xYLayout1);
    jPanel1.setBackground(Color.magenta);
    jPanel1.setPreferredSize(new Dimension(150, 100));
    jPanel2.setBackground(Color.green);
    jPanel2.setPreferredSize(new Dimension(100, 150));
    jLayeredPane1.add(jPanel2,  new XYConstraints(5, 5, -1, -1));
    jLayeredPane1.add(jPanel1,  new XYConstraints(5, 160, -1, -1));
    contentPane.add(jLayeredPane1, BorderLayout.CENTER);
    jLayeredPane1.setLayer(jPanel1, 50);
    jLayeredPane1.setLayer(jPanel2, 30);  }  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e)
  {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING)
    {
      System.exit(0);
    }
  }
}