set PATH=e:\java\bin;e:\java
set JAVA_HOME=c:\java
set classpath=.;e:\java;e:\java\lib;e:\java\lib\tools.jar;e:\java\lib\dt.jar
set JAVA_HOME=c:\java
set classpath=.;e:\java;e:\java\lib;e:\java\lib\tools.jar;e:\java\lib\dt.jar
不过我原来装了jbuilder 后来才装的jdk from sun
看一看这个贴子,希望对你有所帮助!
祝你好运!