Why Maven uses JDK 1 6 but my java -version is 1 7

Question

I m new to maven  and also to MacOS   I have setup maven in my terminal  and when getting the version settings  using mvn -v  it seems it uses JDK 1 6  while I have JDK 1 7 installed  Is there anything wrong   The commands I enter are these   blues helloworld Ninja  java -version    java version  1 7 0 05  Java TM  SE Runtime Environment  build 1 7 0 05-b06  Java HotSpot TM  64-Bit Server VM  build 23 1-b03  mixed mode      blues helloworld Ninja  mvn -v    Apache Maven 3 1 0  893ca28a1da9d5f51ac03827af98bb730128f9f2  2013-06-28 10 15 32 0800  Maven home   usr local Cellar maven 3 1 0 libexec Java version  1 6 0 51  vendor  Apple Inc  Java home   System Library Java JavaVirtualMachines 1 6 0 jdk Contents Home Default locale  zh CN  platform encoding  EUC CN OS name   mac os x   version   10 8 4   arch   x86 64   family   mac

User · Answer

I am late to this question  but I think the best way to handle JDK versions on MacOS is by using the script described at  http   www jayway com 2014 01 15 how-to-switch-jdk-version-on-mac-os-x-maverick

User · Answer

Get into    System Library Frameworks JavaVM framework Versions   and update the CurrentJDK symbolic link to point to   Library Java JavaVirtualMachines YOUR JDK VERSION Contents    E g   cd  System Library Frameworks JavaVM framework Versions sudo rm CurrentJDK sudo ln -s  Library Java JavaVirtualMachines jdk1 8 0 jdk Contents  CurrentJDK   Now it shall work immediately

User · Answer

Please check the compatibility  I struggled with mvn 3 2 1 and jdk 1 6 0 37 for many hours  All variables were set but was not working  Finally I upgraded jdk to 1 8 0 60 and mvn 3 3 3 and that worked  Environment Variables as following   JAVA HOME C  ProgramFiles Java jdk1 8 0 60  MVN HOME C  ProgramFiles apache-maven apache-maven-3 3 3  M2  MVN HOME  bin extend system level Path-   M2   JAVA HOME  bin

User · Answer

add the following to your    mavenrc   export JAVA HOME  Library Java JavaVirtualMachines  jdk-version  Contents Home   Second Solution   echo export  JAVA HOME     usr libexec java home    gt  gt     bash profile

User · Answer

MasterGaurav s solution works perfectly  I normally put the Java switch statement into a zsh function  alias java ls   usr libexec java home -V 2 gt  amp 1   grep -E  quot  d  d  d     quot    cut -d   -f 1   colrm 1 4   grep -v Home   function java use         export JAVA HOME    usr libexec java home -v  1      echo export  quot JAVA HOME    usr libexec java home -v  1  quot   gt     mavenrc     export PATH  JAVA HOME bin  PATH     java -version    You can run java ls to get all of the available JVMs on your machine  and then java use 1 7 to use 1 7 for both Java and Maven

User · Answer

For Eclipse Users  If you have a Run Configuration that does clean package for example   In the Run Configuration panel there is a JRE tab where you can specify against which runtime it should run  Note that this configuration overrides whatever is in the pom xml

User · Answer

You can also do    lt properties gt                      lt  -- maven-compiler-plugin   aka JAVA Compiler 1 7 -- gt         lt maven compiler target gt 1 7 lt  maven compiler target gt         lt maven compiler source gt 1 7 lt  maven compiler source gt                lt  properties gt

User · Answer

You can also explicitly tell maven which java version to compile for  You can try adding the maven-compiler-plugin to your pom    lt project gt             lt build gt                 lt plugins gt         lt plugin gt           lt groupId gt org apache maven plugins lt  groupId gt           lt artifactId gt maven-compiler-plugin lt  artifactId gt           lt version gt 3 1 lt  version gt           lt configuration gt             lt source gt 1 7 lt  source gt             lt target gt 1 7 lt  target gt           lt  configuration gt         lt  plugin gt       lt  plugins gt               lt  build gt           lt  project gt    If you imported a maven project into an IDE  then there is probably a maven setting in your IDE for default compiler that your maven runner is using

User · Answer

It helped me  Just add it in your pom xml   By default maven compiler plugin uses Java 1 5 or 1 6  you have to redefine it in your pom xml    lt build gt       lt plugins gt           lt plugin gt               lt groupId gt org apache maven plugins lt  groupId gt               lt artifactId gt maven-compiler-plugin lt  artifactId gt               lt configuration gt                   lt source gt 1 8 lt  source gt                   lt target gt 1 8 lt  target gt               lt  configuration gt           lt  plugin gt       lt  plugins gt   lt  build gt

[java] Why Maven uses JDK 1.6 but my java -version is 1.7

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