CODEWITHSUNDEEP
java-8java
Mohamed Taboubi
Mohamed Taboubi

Reputation: 7021

How select a given JDK in CentOS

I want update the java version in a CentOS machine,

Actually when I do java -version it gives me : 

$java -version
java version "1.7.0_79"
OpenJDK Runtime Environment (rhel-2.5.5.3.el6_6-x86_64 u79-b14)
OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)

I'm using the alternatives to configure which java interpreter should be used : 

 sudo alternatives --config java

it gives me : 

There are 3 programs which provide 'java'.

      Selection    Command
    -----------------------------------------------
    *  1           /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java
       2           /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java
     + 3           /usr/lib/jvm/jdk1.8.0_91/bin/java

Enter to keep the current selection[+], or type selection number:

and I selected number 3 (which is the jdk1.8.0_91)

however when I redo java -version it still the openJDK 1.7 selected !!!

$java -version
java version "1.7.0_79"
OpenJDK Runtime Environment (rhel-2.5.5.3.el6_6-x86_64 u79-b14)
OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)

Upvotes: 0

Views: 1184

Answers (1)

David Lee
David Lee

Reputation: 306

Run these command to check your configuration:

  • $ which java and the result should be /bin/java or /usr/bin/java. Otherwise, check your environment profile (/etc/bashrc, /etc/profile, ~/.bash_profile, ~/.bashrc, etc.) and remove similar export JAVA_HOME="/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.79.x86_64/jre" declared.
  • $ ls -al /bin/java or $ ls -al /usr/bin/java should be point to /etc/alternatives/java or alternatives will be ineffective.

Upvotes: 1

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