Java.lang.NoClassDefFoundError:com.sun.jdi.Bootstrap occurs when running SQL developer

My Computer is in Oracle 11g.

Because Java can connect to the database because of the support of the JDK, so the JDK1.7 is installed, please note the following words:

The JRE must be installed when the JDK is installed, but :

JDK and JRE cannot be installed in the root directory of the Java folder, the JDK and JRE installed in the same folder will be error;

Install Oracle, replace the Sqldeveloper, think it's all right when the accident happened:

Open Oracle SQL Developer the following error, but the smooth open, uncomfortable

1Exception initializing'Oracle.dbtools.raptor.plsql.PLSQLAddin' inchExtension'Or2 acle SQL Developer': java.lang.NoClassDefFoundError:com/Sun/Jdi/Bootstrap3 At oracle.jdevimpl.debugger.jdi.DebugJDIConnector.getVersion (Debugjdicon4Nector.java: -)5At Oracle.jdevimpl.debugger.support.DebugFactory.<Clinit>(DEBUGFACTORY.J6AvaBayi)7At Oracle.dbtools.raptor.plsql.PLSQLAddin.initialize (Plsqladdin.java: the)8 9 At Oracle.ideimpl.extension.AddinManagerImpl.initializeAddin (addinmanageTenRimpl.java:407) One At Oracle.ideimpl.extension.AddinManagerImpl.initializeAddins (Addinmanag AErimpl.java:214) - At Oracle.ideimpl.extension.AddinManagerImpl.initProductAndUserAddins (Ad -Dinmanagerimpl.java: -) theAt 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: *) +At Oracle.ideimpl.Main.start (Main.java:184) -At Oracle.ideimpl.Main.main (Main.java:146) + At sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) A At Sun.reflect.NativeMethodAccessorImpl.invoke (Unknown Source) at At Sun.reflect.DelegatingMethodAccessorImpl.invoke (Unknown Source) - At Java.lang.reflect.Method.invoke (Unknown Source) -At Oracle.ide.boot.PCLMain.callMain (Pclmain.java: +) -At Oracle.ide.boot.PCLMain.main (Pclmain.java: Wu) - At sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) - At Sun.reflect.NativeMethodAccessorImpl.invoke (Unknown Source) in At Sun.reflect.DelegatingMethodAccessorImpl.invoke (Unknown Source) - At Java.lang.reflect.Method.invoke (Unknown Source) toAt Oracle.classloader.util.MainClass.invoke (Mainclass.java: -) + At Oracle.ide.boot.IdeLauncher.bootClassLoadersAndMain (Idelauncher.java: - 189) theAt Oracle.ide.boot.IdeLauncher.launchImpl (Idelauncher.java: the) *At Oracle.ide.boot.IdeLauncher.launch (Idelauncher.java: $) $At Oracle.ide.boot.IdeLauncher.main (Idelauncher.java: Wu)Panax Notoginseng At sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) - At Sun.reflect.NativeMethodAccessorImpl.invoke (Unknown Source) the At Sun.reflect.DelegatingMethodAccessorImpl.invoke (Unknown Source) + At Java.lang.reflect.Method.invoke (Unknown Source) AAt Oracle.ide.boot.Launcher.invokeMain (Launcher.java:713) theAt Oracle.ide.boot.Launcher.launchImpl (Launcher.java: the) +At Oracle.ide.boot.Launcher.launch (Launcher.java: the) -At Oracle.ide.boot.Launcher.main (Launcher.java: $) $Caused by: oracle.classloader.util.AnnotatedClassNotFoundException: $  - missing class: Com.sun.jdi.Bootstrap -  the Dependent class: Oracle.jdevimpl.debugger.jdi.DebugJDIConnector -Loader: IDE-Global11.1.1.0.0WuyiCode Source:/D:/oracle11g/Product/11.2.0/Dbhome_1/Sqldeveloper/Jdev/Exte theNsions/Oracle.jdeveloper.runner.jar -Configuration: Extension jarinchD:\Oracle11g\product\11.2.0\dbhome_1\sqldevelop Wu er\jdev\extensions -  AboutThis load operation was initially in the IDE-Global11.1.1.0.0using the LoadClass () method.  $  - The missing classes are not available in any code source or loader on the system.  - At Oracle.classloader.PolicyClassLoader.handleClassNotFound (Policyclassl -Oader.java:2190) A At Oracle.classloader.PolicyClassLoader.internalLoadClass (Policyclassloa +Der.java:1733) theAt oracle.classloader.policyclassloader.access$ the(Policyclassloader.jav

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Check to find out there is no solution! It turned out to be quite simple: there was a JRE program in all the programs: Java Runtime Environment

as long as the JRE part of the program is unloaded , the normal run up

Java.lang.NoClassDefFoundError:com.sun.jdi.Bootstrap occurs when running SQL developer