About Java version on hackbox

Hi, All

Any method to keep java version for user separately on hackbox?

Now we all use hackbox to build androids, but different android version needs to use different java version, like the master branch needs to use java7, while others need to use java6, but now seems we can only use update-alternatives to config for the system level, not for user level. Then where will be the problem that one changes the java version during one android, and causes the running build failed.

Anyone has good method on resolving this problem?