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I have installed JDK 1.8 on my ubuntu 16.04, for some kind of work I had to install JDK 1.7.I installed it without did anything to my older version and changed the $JAVA_HOME to point the newly installed location.

echo $JAVA_HOME works fine , showing newly installed version which is 1.7

but when I do $ java -version it shows earlier installed version which is 1.8.

Why does this happen? How to resolve it.

I need 1.7 to work with it further.

If I went wrong in somewhere please correct me,I need good explanation regarding this.

Thank you. here is my terminal

terminal

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  • 1
    You need to set the PATH. JAVA_HOME is irrelevant. Commented Jul 1, 2016 at 6:35
  • I have put these lines in bashrc #JAVA HOME directory setup export JAVA_HOME=/usr/lib/java/jdk1.7.0_79 export PATH="$PATH:$JAVA_HOME/bin" Commented Jul 1, 2016 at 6:38
  • in case you installed your java's from the webupd8 ppa also installed the oracle-java7-set-default package. Commented Jul 1, 2016 at 6:44

1 Answer 1

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Try to run following command in terminal:

$ sudo update-alternatives --config java

It shows installed alternatives for java command. You can choose which one you will use by default further on.

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2 Comments

could you be able explain this further to me?
update-alternatives updates the links in /etc/alternatives to point the command to the actual program to run. askubuntu.com/questions/233190/…

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