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专业: 控制理论与方法

[求助] java中关于加载图片问题

package com.muchTask;

import java.awt.Container;
import java.awt.EventQueue;
import java.awt.Image;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class SleepMethodDemo extends JFrame implements Runnable {

@Override
public void run() {
int width = getWidth();
while(true){
for(int i=0;i<width;i+=3){
try{
Thread.sleep(30);
}catch(InterruptedException e){
e.printStackTrace();
}
}
}

}

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
EventQueue.invokeLater(new Runnable() {

@Override
public void run() {
try{
SleepMethodDemo frame = new SleepMethodDemo();
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Thread thread = new Thread();
thread.start();
}catch(Exception e){
e.printStackTrace();
}
}
});
}

public SleepMethodDemo(){
super();
setResizable(false);
Container c = getContentPane();
c.setLayout(null);
setBounds(100,100,300,78);
JLabel picture = new JLabel();
//加载图片
ImageIcon icon = new ImageIcon(getClass().getResource("D:\\Program Files\\eclipse-SDK-3.6.2-win32\\Thread\\bin\\com\\muchTask.aa.jpg"

);
picture.setIcon(icon);
picture.setBounds(0, 0, icon.getIconWidth(), icon.getIconHeight());
c.add(picture);
setVisible(true);

}

}
以上这是我的程序，我想把图图片加载到JFrame里面，用的是绝对路径，而且图片放在了根目录下，也就是java中的bin目录下面。但是运行后出现了问题，如下所示：
java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(Unknown Source)
at com.muchTask.SleepMethodDemo.<init>(SleepMethodDemo.java:59)
at com.muchTask.SleepMethodDemo$1.run(SleepMethodDemo.java:39)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
问题出在哪里呢？每次加载图片都没有成功过，求指点。

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