JPanel显示不出来，大虾请帮忙！先谢了！

[happy_yls]

初学GUI，想在一个Frame上放多个Panel，左右各一个，就像windows资源管理器那样把窗口分成左右两部分，但大小可以自己控制，
MyPanel上都已放了控件
private void initialize() {
this.getContentPane().setLayout(new BorderLayout());
this.getContentPane().add(new MyPanel(),BorderLayout.WEST);
this.getContentPane().add(new MyPane1(),BorderLayout.EAST);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setForeground(Color.white);
this.setBackground(Color.white);
this.setResizable(true);
this.setSize(new Dimension(800, 600));
this.setTitle("演示程序");
}
如上代码，怎么是一个空白窗口？只有将以上红色部分代码其中一个改为
this.getContentPane().add(new MyPanel(),BorderLayout.CENTER);
才可以显示出来，是不是必须有一个panel要放中间？？？怎样做才能实现我的需求呢？

[zjucoco]

this.getContentPane().add(new MyPane1(),BorderLayout.EAST);
这行你是不是把l写成1了？

还有，为了布局好看一般都是一个是West，一个是Center。或者，一个是East，一个是Center。

[lihaifeng0412]

不可能把，把你的代码都帖出来

[happy_yls]

今天又试了，还是只能看到Center的panel，west的panle看不到，现在把代码全贴出来：
package happy;

import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JFrame;

import java.awt.Color;

public class MyFrame extends JFrame {

private static final long serialVersionUID = 1L;

/**
* This is the default constructor
*/
public MyFrame() {
super();
initialize();
}

/**
* This method initializes this
*
* @return void
*/
private void initialize() {
this.getContentPane().setLayout(new BorderLayout());
this.getContentPane().add(new MyPanel(),BorderLayout.WEST);
this.getContentPane().add(new MyPanel(),BorderLayout.CENTER);
//this.getContentPane().add(new AAA(),BorderLayout.CENTER);
//this.getContentPane().add(myTabbedPane);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setForeground(Color.white);
this.setBackground(Color.white);
this.setResizable(true);
this.setSize(new Dimension(800, 600));
this.setTitle("演示程序");
}


} // @jve:decl-index=0:visual-constraint="10,10"

******************************************************
package happy;

import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.util.ArrayList;

import javax.swing.JPanel;
import java.awt.Font;
import java.awt.Color;

public class MyPanel extends JPanel {//根据当前时间画一个坐标轴

private static final long serialVersionUID = 1L;

static final int count = 12;// 1个时间轴5个候车室

static final int hour = 3;// 显示未来3个小时

static final int minute = 10;// 10分钟一小格,刷新时间也为10分钟

private float width = 0;// 每个显示单位的宽度高度

private float heigth = 0;

private float screenWidth = 0;// 屏幕的宽度高度,实际是thisPanel的宽度高度

private float screenHeigth = 0;

private Point2D pointBegin;

private Point2D pointEndx;

private Point2D pointEndy;

/**
* This is the default constructor
*/
public MyPanel() {
super();
initialize();
}

/**
* This method initializes this
*
* @return void
*/
private void initialize() {
this.setSize(300, 200);
this.setLayout(new BorderLayout());
this.setFont(new Font("Arial", Font.BOLD, 12));
this.setBackground(Color.white);
}

protected void paintComponent(Graphics g) {
// TODO Auto-generated method stub
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
screenWidth = this.getWidth();
screenHeigth = this.getHeight();// 得到Panel高度
width = screenWidth / 2;// 得到Panel宽度，一半作为x线段宽度
heigth = screenHeigth / count ;// 得到每个图象高度

ArrayList al = Tools.getFutureTime(hour, minute);
for (int m = 0; m < count; m++) {
pointBegin = new Point2D.Double((screenWidth - width) / 2, heigth
* 9 / 10 + m * heigth);
pointEndx = new Point2D.Double((screenWidth + width) / 2, heigth
* 9 / 10 + m * heigth);
pointEndy = new Point2D.Double((screenWidth - width) / 2, heigth
* 1 / 10 + m * heigth);
Line2D linex = new Line2D.Double(pointBegin, pointEndx);
Line2D liney = new Line2D.Double(pointBegin, pointEndy);
g2d.draw(liney);// Y轴
g2d.draw(linex);// X轴
// *********************时间刻度*********************************
int division = hour * (60 / minute);
if (m == 0) {
for (int i = 0; i < division; i++) {
float length = heigth * 9 / 10 + 6;
String time = al.get(i).toString();
Point2D pointxx = new Point2D.Double((screenWidth - width)
/ 2 + width * i / division, heigth * 9 / 10 + m
* heigth);
if (time.indexOf(":00") > -1 || time.indexOf(":30") > -1)
length = heigth * 9 / 10 + 12;
Point2D pointxy = new Point2D.Double((screenWidth - width)
/ 2 + width * i / division, length + m * heigth);
Line2D linexx = new Line2D.Double(pointxx, pointxy);
g2d.draw(linexx);
if (time.indexOf(":00") > -1)
g2d.drawString(al.get(i).toString().substring(0, 2),
(screenWidth - width) / 2
+ (screenWidth - width) * i / division,
length + m * heigth);
}
}
}

// ***********************************************************
}
}

[happy_yls]

试了一下，如果改为
this.getContentPane().add(new JButton(),BorderLayout.WEST);
this.getContentPane().add(new JButton(),BorderLayout.CENTER);
可以显示，是不是frame上不可以放多个panel啊？

[huadis]

import   java.awt.BorderLayout; 
import   java.awt.Dimension; 
import   javax.swing.JFrame; 

import   java.awt.Color; 

public   class   MyFrame   extends   JFrame   { 

private   static   final   long   serialVersionUID   =   1L; 

/** 
  *   This   is   the   default   constructor 
  */ 
public   MyFrame()   { 
super();
this.getContentPane().setLayout(new   BorderLayout()); 
this.getContentPane().add(new   MyPanel("aaaaa"),BorderLayout.WEST); 
this.getContentPane().add(new   MyPanel("bbbbb"),BorderLayout.CENTER); 
//this.getContentPane().add(new   AAA(),BorderLayout.CENTER); 
//this.getContentPane().add(myTabbedPane); 
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
this.setForeground(Color.white); 
this.setBackground(Color.white); 
        this.setResizable(true); 
        this.setSize(new   Dimension(800,   600)); 
        this.setTitle("演示程序"); 
        show();
} 

/** 
  *   This   method   initializes   this 
  *   
  *   @return   void 
  */ 

public static void main(String args[]){
	MyFrame f=new MyFrame();
}

}     //     @jve:decl-index=0:visual-constraint="10,10" 

import   javax.swing.*; 
import javax.swing.border.BevelBorder;
import javax.swing.border.Border;

import   java.awt.*;

class   MyPanel   extends   JPanel   {//根据当前时间画一个坐标轴 


/** 
  *   This   is   the   default   constructor 
  */ 
	public   MyPanel(String s)   { 
		JLabel lb=new JLabel(s);
		lb.setBounds(50,20,300,100);
		add(lb);
		Border border=BorderFactory.createBevelBorder(BevelBorder.RAISED,new Color(122,138,153),new Color(54,71,89));
		setBorder(border);
	}
} 

估计不合你要求.