高手帮忙看一下吧

[寂寞灵魂]

怎么MyPanel显示不出来？帮忙看一下...在线等..

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class CADTest extends JFrame {
	
	JPanel doPanel,contentPane;
	JLabel x1,x2,x3,y1,y2,y3,xx1,xx2,xx3,yy1,yy2,yy3,original,changed,symmetry,title;
	JTextField fx1,fx2,fx3,fy1,fy2,fy3,fxx1,fxx2,fxx3,fyy1,fyy2,fyy3,enlargeNum,rotationNum;
	JButton enter,symmetryX,symmetryY,symmetryO,enlarge,rotation;
	GridBagLayout layout;
	GridBagConstraints constraints;
	
	public CADTest() {
		
		
		contentPane = new JPanel();
		doPanel = new JPanel();
		
		fx1 = new JTextField(3);
		fx2 = new JTextField(3);
		fx3 = new JTextField(3);
		fy1 = new JTextField(3);
		fy2 = new JTextField(3);
		fy3 = new JTextField(3);
		fxx1 = new JTextField(3);
		fxx2 = new JTextField(3);
		fxx3 = new JTextField(3);
		fyy1 = new JTextField(3);
		fyy2 = new JTextField(3);
		fyy3 = new JTextField(3);
		enlargeNum = new JTextField(7);
		rotationNum = new JTextField(7);
		
		x1 = new JLabel("x1");
		x2 = new JLabel("x2");
		x3 = new JLabel("x3");
		y1 = new JLabel("y1");
		y2 = new JLabel("y2");
		y3 = new JLabel("y3");
		xx1 = new JLabel("x1");
		xx2 = new JLabel("x2");
		xx3 = new JLabel("x3");
		yy1 = new JLabel("y1");
		yy2 = new JLabel("y2");
		yy3 = new JLabel("y3");
		original = new JLabel("原始的坐标");
		changed = new JLabel("改变后的坐标");
		symmetry = new JLabel("对称变换");
		title = new JLabel("CDA");
		
		enter = new JButton("确定");
		symmetryX = new JButton("沿X对称");
		symmetryY = new JButton("沿Y对称");
		symmetryO = new JButton("沿原点对称");
		enlarge = new JButton("放大倍数");
		rotation = new JButton("旋转角度");
		
		layout = new GridBagLayout();
		constraints = new GridBagConstraints();
		
		doPanel.setLayout(layout);
		//doPanel.setBorder(null);
		
		constraints.fill = GridBagConstraints.VERTICAL;
		addComponent(title,0,0,14,1);
		addComponent(original,1,0,1,1);
		addComponent(x1,1,1,1,1);
		addComponent(fx1,1,2,1,1);
		addComponent(x2,1,3,1,1);
		addComponent(fx2,1,4,1,1);
		addComponent(x3,1,5,1,1);
		addComponent(fx3,1,6,1,1);
		addComponent(y1,1,7,1,1);
		addComponent(fy1,1,8,1,1);
		addComponent(y2,1,9,1,1);
		addComponent(fy2,1,10,1,1);
		addComponent(y3,1,11,1,1);
		addComponent(fy3,1,12,1,1);
		addComponent(enter,1,14,1,1);
		
		addComponent(changed,2,0,1,1);
		addComponent(xx1,2,1,1,1);
		addComponent(fxx1,2,2,1,1);
		addComponent(xx2,2,3,1,1);
		addComponent(fxx2,2,4,1,1);
		addComponent(xx3,2,5,1,1);
		addComponent(fxx3,2,6,1,1);
		addComponent(yy1,2,7,1,1);
		addComponent(fyy1,2,8,1,1);
		addComponent(yy2,2,9,1,1);
		addComponent(fyy2,2,10,1,1);
		addComponent(yy3,2,11,1,1);
		addComponent(fyy3,2,12,1,1);
		
		addComponent(symmetry,3,0,1,1);
		addComponent(symmetryX,3,1,1,1);
		addComponent(symmetryY,3,2,1,1);
		addComponent(symmetryO,3,3,1,1);
		
		addComponent(enlarge,4,0,1,1);
		addComponent(enlargeNum,4,1,1,1);
		addComponent(rotation,4,2,1,1);
		addComponent(rotationNum,4,3,1,1);
		
		doPanel.setBounds(0,0,700,165);
		contentPane.add(doPanel);

		MyPanel myP = new MyPanel();
		myP.setBounds(0,165,700,400);
		contentPane.add(myP);
		//setUndecorated(true);
		
		getContentPane().add(contentPane);
		
		this.update(this.getGraphics());
		contentPane.repaint();
		//pack();
		
		setTitle("CADTest");
		setBounds(100,100,700,565);
		//setResizable(false);
		setVisible(true);
		
	}
	
private void addComponent(Component component,int row,int column,int width,int height){
		
		constraints.gridx = column;
		constraints.gridy = row;
		constraints.gridwidth = width;
		constraints.gridheight = height;
		
		layout.setConstraints(component, constraints);
		doPanel.add(component);
		
	}
	
	public static void main(String[]args){
		CADTest application = new CADTest();
		application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	
	
	
}

class MyPanel extends JPanel {
	
	int x,y;
	
	public MyPanel() {
	addMouseListener(new MouseAdapter(){
		public void mousePressed(MouseEvent e){
			x = getX();
			y = getY();
			JOptionPane.showMessageDialog(null, "ja");
		}
	});
	}
	
	
	public int getXer() {
		return x;
	}
	public int getYer() {
		return y;
	}
	
	public void paintComponent(Graphics g) {
		g.drawLine(0, 165, 700, 165);
		g.drawLine(0, 365, 700, 365);
		g.drawLine(350, 165, 350, 565);
	}
}

[zhaoming262350]

把你的添加面板的代码改成这样，再把其他的代码添加到两个小的面板中就行了

MyPanel myP = new MyPanel();

add(myP); // 这儿

myP.setBounds(0,165,700,400);



doPanel.setBounds(0,0,700,165);
myP.add(doPanel);


//setUndecorated(true);

myP.add(contentPane);

this.update(this.getGraphics());

[寂寞灵魂]

[Quote=引用 1 楼 的回复:]

把你的添加面板的代码改成这样，再把其他的代码添加到两个小的面板中就行了

MyPanel myP = new MyPanel();

add(myP); // 这儿

myP.setBounds(0,165,700,400);



d……
[/Quote]
我是想把myP和doPanel添加到contentPane里的..