package com.corejava.L73;

/**
 * 例题7-3 界面没有显示字符
 */
import java.awt.BorderLayout;
import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class NotHelloJava {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        NotHelloWorldFrame frame = new NotHelloWorldFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}

class NotHelloWorldFrame extends JFrame {

    public NotHelloWorldFrame() {
        setTitle("NotHelloWorld");
        setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
        NotHelloWorldPanel panel = new NotHelloWorldPanel();
        add(panel);
    }

    private static final int DEFAULT_WIDTH = 300;
    private static final int DEFAULT_HEIGHT = 200;
}

class NotHelloWorldPanel extends JPanel {
    public void paintComponet(Graphics g) {
        super.paintComponent(g);        
        g.drawString("NotHelloWorldPanel", MESSAGE_X, MESSAGE_Y); // 未显示
    }

    public static final int MESSAGE_X = 75;
    public static final int MESSAGE_Y = 100;
}
这是Java核心技术卷一第七章的例题，现在运行后没出现预期的效果（运行后在面板上会显示文字），调试发现红色代码部分未被运行，请教高手指点。

正确:public void paintComponent(Graphics g)
错误:public void paintComponet(Graphics g)
后来查到了,其实写错了字,看这个:
 public void paintComponet(Graphics g) {
        super.paintComponent(g);  ...}
这段应该是重写父类的paintComponent,结果方法名少写了个n,修正后运行正常,但原因不明...