Uninstalling openjdk with sunjdk

Set the java_home path through the profile file

 
Sudo VI/etc/profile
 

For more information, see

Java configuration in Ubuntu

 

If you run the command

 
Java-version
 

 

Ubuntu may have a default JDK, such as openjdk. If openjdk is available, the result is openjdk.

Therefore, to use the JDK we installed by default, perform the following work.
Run
Code:
Update-alternatives -- install/usr/bin/Java ~ /JDK 1.7.0 _ 67/bin/Java 300
Update-alternatives -- install/usr/bin/javac ~ /JDK 1.7.0 _ 67/bin/javac 300

In this step, add the installed JDK to the Java menu.

Then execute
Code:
Update-alternatives -- config Java

In this step, select the default JDK

Uninstalling openjdk with sunjdk