CODEWITHSUNDEEP
javaenvironment-variables
Jatin
Jatin

Reputation: 31724

Weird issue with environment variables

I have this strange Issue with environment variables on my windows 7 system. Its been there for an year and I have had a work around but I need to solve it now:

I have an environment variable JAVA_HOME set as C:\Program Files\Java\jdk1.6.0_39\. And in my PATH I have added %JAVA_HOME%\bin;.

But when I do java -version it prints "1.7.0_11" and when I do javac -version it prints as expected 1.6.0_39

I do not know why 1.7.0_11 is printed for java -version. I have checked my PATH and have added JAVA_HOME only once. How can I know which env variable is responsible for using my java.exe? How do I avoid it?

Upvotes: 0

Views: 111

Answers (3)

AlexR
AlexR

Reputation: 115328

Java.exe is installed on windows twice. The first location is where you expect it: under your JAVA_HOME. The second one is under c:/windows. Since this path always wins any other user defined path you are running java from here. If you want to hold several java environments and switch between them by changing your JAVA_HOME just remove java.exe from c:/windows.

Upvotes: 1

StormeHawke
StormeHawke

Reputation: 6207

Ok, hopefully %JAVA_HOME\bin%; is a typo, but if not, it should be %JAVA_HOME%\bin.

For the rest - java -version is looking for your JRE, not your JDK. javac is looking for the JDK.

Check to see if you have a JRE-related environment variable. As well, check your path for any hard references to the Java 7 JRE. Finally, look in C:\Windows\System32 and see if there is a java.exe there.

Upvotes: 1

Jon Skeet
Jon Skeet

Reputation: 1499800

It's almost certainly a version of java.exe in c:\Windows\System32, which is likely to come earlier in your path than the part which refers to JAVA_HOME.

Upvotes: 2

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