I want to change maven java home which is open jdk with sun jdk. How can I do it ?
root@ak-EasyNote-TM98:~# mvn -version
Apache Maven 3.0.4
Maven home: /usr/share/maven
Java version: 1.6.0_24, vendor: Sun Microsystems Inc.
Java home: /usr/lib/jvm/java-6-openjdk-amd64/jre
Default locale: tr_TR, platform encoding: UTF-8
OS name: "linux", version: "3.2.0-34-generic", arch: "amd64", family: "unix"
Edit:
So sorry. I forgot to write the below code :
root@ak-EasyNote-TM98:~$ java -version
java version "1.7.0_07"
Java(TM) SE Runtime Environment (build 1.7.0_07-b10)
Java HotSpot(TM) 64-Bit Server VM (build 23.3-b01, mixed mode)
My java home default path is sun jdk already. But maven java home has pointed openjdk. I want to fix it only for maven.
If you are in Linux, set JAVA_HOME using syntax export JAVA_HOME=<path-to-java>
. Actually it is not only for Maven.
I have two Java versions on my Ubuntu server 14.04: java 1.7
and java 1.8
.
I have a project that I need to build using java 1.8
.
If I check my Java version using java -version
I get
java version "1.8.0_144"
But when I did mvn -version
I get:
Java version: 1.7.0_79, vendor: Oracle Corporation
java8
I do this:
export JAVA_HOME=/usr/lib/jvm/java-8-oracle/jre/
Then when I do mvn -version
I get:
Java version: 1.8.0_144, vendor: Oracle Corporation
I am using Mac and none of the answers above helped me. I found out that maven loads its own JAVA_HOME from the path specified in: ~/.mavenrc
I changed the content of the file to be: JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home
For Linux it will look something like:
JAVA_HOME=/usr/lib/jvm/java-8-oracle/jre
If you are dealing with multiple projects needing different Java versions to build, there is no need to set a new JAVA_HOME
environment variable value for each build. Instead execute Maven like:
JAVA_HOME=/path/to/your/jdk mvn clean install
It will build using the specified JDK, but it won't change your environment variable.
Demo:
$ mvn -v
Apache Maven 3.6.0
Maven home: /usr/share/maven
Java version: 11.0.6, vendor: Ubuntu, runtime: /usr/lib/jvm/java-11-openjdk-amd64
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "4.15.0-72-generic", arch: "amd64", family: "unix"
$ JAVA_HOME=/opt/jdk1.8.0_201 mvn -v
Apache Maven 3.6.0
Maven home: /usr/share/maven
Java version: 1.8.0_201, vendor: Oracle Corporation, runtime: /opt/jdk1.8.0_201/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "4.15.0-72-generic", arch: "amd64", family: "unix"
$ export | grep JAVA_HOME
declare -x JAVA_HOME="/usr/lib/jvm/java-11-openjdk-amd64"
Even if you install the Oracle JDK, your $JAVA_HOME
variable should refer to the path of the JRE that is inside the JDK root. You can refer to my other answer to a similar question for more details.
Appears to be a duplicate of https://askubuntu.com/questions/21131/how-to-correctly-remove-openjdk-and-jre-and-set-the-system-use-only-and-only-sun#answer-21137 assuming that you are using Ubuntu.
The key is to use the command sudo update-java-alternatives -s java-6-sun
. Any commands that rely on javac
will be affected and not just Maven.
Great helps above, but if you having the similar environment like I did, this is how I get it to work.
Edit this file /etc/profile.d/apache-maven.sh, such as the following, note that it will affect the whole system.
$ cat /etc/profile.d/apache-maven.sh
MAVEN_HOME=/usr/share/apache-maven
M2_HOME=$MAVEN_HOME
PATH=$MAVEN_HOME/bin:$PATH
# change below to the jdk you want mvn to reference.
JAVA_HOME=/usr/java/jdk1.7.0_40/
export MAVEN_HOME
export M2_HOME
export PATH
export JAVA_HOME
Just set JAVA_HOME env property.
The best way to force a specific JVM for MAVEN is to create a system wide file loaded by the mvn script.
This file is /etc/mavenrc
and it must declare a JAVA_HOME
environment variable pointing to your specific JVM.
Example:
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64
If the file exists, it's loaded.
Here is an extract of the mvn
script in order to understand :
if [ -f /etc/mavenrc ] ; then . /etc/mavenrc fi if [ -f "$HOME/.mavenrc" ] ; then . "$HOME/.mavenrc" fi
Alternately, the same content can be written in ~/.mavenrc
Source: Stackoverflow.com