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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(); //¼ÓÔØÍ¼Æ¬ 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); } } ÒÔÉÏÕâÊÇÎҵijÌÐò£¬ÎÒÏë°ÑͼͼƬ¼ÓÔØµ½JFrameÀïÃæ£¬ÓõÄÊǾø¶Ô·¾¶£¬¶øÇÒͼƬ·ÅÔÚÁ˸ùĿ¼Ï£¬Ò²¾ÍÊÇjavaÖеÄbinĿ¼ÏÂÃæ¡£µ«ÊÇÔËÐкó³öÏÖÁËÎÊÌ⣬ÈçÏÂËùʾ£º 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) ÎÊÌâ³öÔÚÄÄÀïÄØ£¿Ã¿´Î¼ÓÔØÍ¼Æ¬¶¼Ã»Óгɹ¦¹ý£¬ÇóÖ¸µã¡£ |
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