sql developer问题
我电脑是64位系统，装了Oracle11g之后自己从官网下的sql developer替换的源文件，从sqldeveloper.bat启动sql developer时出现下列异常，我是菜鸟，求详解。
Exception initializing 'oracle.dbtools.raptor.plsql.PLSQLAddin' in extension 'Or
acle SQL Developer': java.lang.NoClassDefFoundError: com/sun/jdi/Bootstrap
  at oracle.jdevimpl.debugger.jdi.DebugJDIConnector.getVersion(DebugJDICon
nector.java:30)
  at oracle.jdevimpl.debugger.support.DebugFactory.<clinit>(DebugFactory.j
ava:81)
  at oracle.dbtools.raptor.plsql.PLSQLAddin.initialize(PLSQLAddin.java:96)

  at oracle.ideimpl.extension.AddinManagerImpl.initializeAddin(AddinManage
rImpl.java:407)
  at oracle.ideimpl.extension.AddinManagerImpl.initializeAddins(AddinManag
erImpl.java:214)
  at oracle.ideimpl.extension.AddinManagerImpl.initProductAndUserAddins(Ad
dinManagerImpl.java:128)
  at oracle.ide.IdeCore.initProductAndUserAddins(IdeCore.java:1941)
  at oracle.ide.IdeCore.startupImpl(IdeCore.java:1565)
  at oracle.ide.Ide.startup(Ide.java:703)
  at oracle.ideimpl.DefaultIdeStarter.startIde(DefaultIdeStarter.java:35)
  at oracle.ideimpl.Main.start(Main.java:184)
  at oracle.ideimpl.Main.main(Main.java:146)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
  at java.lang.reflect.Method.invoke(Unknown Source)
  at oracle.ide.boot.PCLMain.callMain(PCLMain.java:62)
  at oracle.ide.boot.PCLMain.main(PCLMain.java:54)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
  at java.lang.reflect.Method.invoke(Unknown Source)
  at oracle.classloader.util.MainClass.invoke(MainClass.java:128)
  at oracle.ide.boot.IdeLauncher.bootClassLoadersAndMain(IdeLauncher.java:
189)
  at oracle.ide.boot.IdeLauncher.launchImpl(IdeLauncher.java:89)
  at oracle.ide.boot.IdeLauncher.launch(IdeLauncher.java:65)
  at oracle.ide.boot.IdeLauncher.main(IdeLauncher.java:54)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
  at java.lang.reflect.Method.invoke(Unknown Source)
  at oracle.ide.boot.Launcher.invokeMain(Launcher.java:713)
  at oracle.ide.boot.Launcher.launchImpl(Launcher.java:115)
  at oracle.ide.boot.Launcher.launch(Launcher.java:68)
  at oracle.ide.boot.Launcher.main(Launcher.java:57)
Caused by: oracle.classloader.util.AnnotatedClassNotFoundException:

  缺少类: com.sun.jdi.Bootstrap

  从属类: oracle.jdevimpl.debugger.jdi.DebugJDIConnector
  加载器: ide-global:11.1.1.0.0
  代码源: /D:/Oracle11g/product/11.2.0/dbhome_1/sqldeveloper/jdev/exte
nsions/oracle.jdeveloper.runner.jar
  配置: extension jar in D:\Oracle11g\product\11.2.0\dbhome_1\sqldevelop
er\jdev\extensions

此加载操作最初是在 ide-global: