因为单位培训的材料需要在网上学习，还有用java插件，我的机器是thinkpad t61，原来就带java1.5，可是不知道为什么就是打不开，
到java网站上验证下，java控制台内容如下：
  Java(TM) Plug-in: version 1.5.0
使用 JRE 版本 1.5.0-beta Java HotSpot(TM) Client VM
用户主目录 = C:\Documents and Settings\lenovo

java.lang.NullPointerException
    at sun.plugin.AppletViewer.loadLocalJarFiles(Unknown Source)
    at sun.plugin.AppletViewer.loadJarFiles(Unknown Source)
    at sun.applet.AppletPanel.runLoader(Unknown Source)
    at sun.applet.AppletPanel.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
    at sun.plugin.AppletViewer.loadLocalJarFiles(Unknown Source)
    at sun.plugin.AppletViewer.loadJarFiles(Unknown Source)
    at sun.applet.AppletPanel.runLoader(Unknown Source)
    at sun.applet.AppletPanel.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
    at sun.plugin.AppletViewer.loadLocalJarFiles(Unknown Source)
    at sun.plugin.AppletViewer.loadJarFiles(Unknown Source)
    at sun.applet.AppletPanel.runLoader(Unknown Source)
    at sun.applet.AppletPanel.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
    at sun.plugin.AppletViewer.loadLocalJarFiles(Unknown Source)
    at sun.plugin.AppletViewer.loadJarFiles(Unknown Source)
    at sun.applet.AppletPanel.runLoader(Unknown Source)
    at sun.applet.AppletPanel.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
    at sun.plugin.AppletViewer.loadLocalJarFiles(Unknown Source)
    at sun.plugin.AppletViewer.loadJarFiles(Unknown Source)
    at sun.applet.AppletPanel.runLoader(Unknown Source)
    at sun.applet.AppletPanel.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
    at sun.plugin.AppletViewer.loadLocalJarFiles(Unknown Source)
    at sun.plugin.AppletViewer.loadJarFiles(Unknown Source)
    at sun.applet.AppletPanel.runLoader(Unknown Source)
    at sun.applet.AppletPanel.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
不知道怎么解决了，培训很急，谢谢各位高手帮忙指点下！谢谢！

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