After jbuilder4 is installed, eclipse cannot start.

Error description:

 

Log File:

! Session mon dec 03 17:28:12 CST 2012 ------------------------------------------
! Entry org. Eclipse. Equinox. launcher 4 0 17:28:12. 609
! Message exception launching the eclipse platform:
! Stack
Java. Lang. unsupportedclassversionerror: ORG/Eclipse/CORE/runtime/adaptor/eclipsestarter (unsupported Major. Minor version 48.0)
At java. Lang. classloader. defineclass0 (native method)
At java. Lang. classloader. defineclass (classloader. Java: 486)
At java. Security. secureclassloader. defineclass (secureclassloader. Java: 111)
At java.net. urlclassloader. defineclass (urlclassloader. Java: 248)
At java.net. urlclassloader. Access $100 (urlclassloader. Java: 56)
At java.net. urlclassloader $ 1.run( urlclassloader. Java: 195)
At java. Security. accesscontroller. doprivileged (native method)
At java.net. urlclassloader. findclass (urlclassloader. Java: 188)
At java. Lang. classloader. loadclass (classloader. Java: 297)
At java. Lang. classloader. loadclass (classloader. Java: 253)
At org. Eclipse. Equinox. launcher. Main. invokeframework (main. Java: 619)
At org. Eclipse. Equinox. launcher. Main. basicrun (main. Java: 577)
At org. Eclipse. Equinox. launcher. Main. Run (main. Java: 1410)

Solution:

Find this in the registry:

HKEY_LOCAL_MACHINE \ SOFTWARE \ javasoft \ Java Runtime Environment \. Then you can see that another 1.3 is added, and the system deletes and restarts. Solve the problem.