Gradle does not recognize the JAVA_HOME I have set

Question

I have set my JAVA_HOME to /usr/lib/jvm/java-7-oracle, which contains a valid JVM, but gradle insists on using /usr/lib/jvm/default-java and complains about JAVA_HOME:

$ echo $JAVA_HOME 
/usr/lib/jvm/java-7-oracle
$ ls $JAVA_HOME
bin  COPYRIGHT  db  include  jre  lib  LICENSE  man  README.html  release  src.zip  THIRDPARTYLICENSEREADME-JAVAFX.txt  THIRDPARTYLICENSEREADME.txt
$ gradle assemble

ERROR: JAVA_HOME is set to an invalid directory: /usr/lib/jvm/default-java

Please set the JAVA_HOME variable in your environment to match the
location of your Java installation.

How can I fix this and have gradle use my valid JAVA_HOME?

Note: My JAVA_HOME is set by ~/.bashrc using export JAVA_HOME="/usr/lib/jvm/java-7-oracle"

Solution 1

it is quite common issue. Just go to your gradle home directory and bin, for example:

/home/user/gradle-2.0/bin

and there you should have gradle script, I am on a Windows machine now so I have gradle.bat, probably you will have gradle.sh or something like this. In that file, find the line:

set JAVA_HOME=%JAVA_HOME:"=%

or as I can see you are on linux so there will be "export" and change it to your java home directory for example:

export JAVA_HOME=/usr/lib/jvm/java-7-oracle

Solution 2

If on windows, also make changes to JAVA_EXE and add your path

    set JAVA_EXE=C:\yourpath\bin\java.exe

Comments

[Nicolas Raoul]

Indeed! Line 70 of /usr/share/gradle/bin/gradle is export JAVA_HOME=/usr/lib/jvm/default-java. Removing that line fixes the problem.

[rahulrvp]

This happens in newer versions also. where the 70th line mentioned here is removed in gradle script. This is how I fixed it, run which java and take it's result. remove the /bin/java from that and use it to set the JAVA_HOME. Then call the gradlew command.