Java change default version / cambiar la version Java por defecto


If we have more than one Java version installed on your Linux server (Redhat flavor) you can change defaults using ‘alternatives’ command:

[hadoop@ip-172-31-36-252 ~]$ sudo /usr/sbin/alternatives --config java

There are 2 programs which provide 'java'.

  Selection    Command
-----------------------------------------------
*+ 1           /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java
   2           /usr/lib/jvm/jre-1.8.0-openjdk.x86_64/bin/java

Enter to keep the current selection[+], or type selection number: 2
[hadoop@ip-172-31-36-252 ~]$ sudo /usr/sbin/alternatives --config java

There are 2 programs which provide 'java'.

  Selection    Command
-----------------------------------------------
*  1           /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java
 + 2           /usr/lib/jvm/jre-1.8.0-openjdk.x86_64/bin/java

Enter to keep the current selection[+], or type selection number:
[hadoop@ip-172-31-36-252 ~]$

 

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