How to set default Java version in Linux

How to set default Java version?

We have multiple java version installed in to the system like 1.7, 1.8 or 11 but my application need java 11 as default JAVA so how can i set the default java version 11 for the system ?

Here is the solution to set the default version of java using

1 - first check the existing java version 

java -version

Here we have java 1.8 as default java version, so in that case we will change the default java version using below command

sudo update-alternatives --config java

Note:  (+) is representing the java version 

In the above output we can see the default java version java-1.8.0-openjdk.x86_64, 

To change the default java version we will type number 1  for java-11 and press the enter key

Verify 

java -version 

Thanks you !!

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