Java

Download and install java 

sudo yum install java-11

Use Alternatives to  change your default version 

sudo alternatives --config java   - then select the number 

update version using update-alternate 

sudo update-alternatives --config java

Check java version 

java -version

Change java home directory 

• there are multiple ways try one of the following and user which one works for you

sudo vi ~/.bashrc

sudo vi ~/.bash_profile

sudo vi /etc/profile

sudo vi /etc/profile.d/java.sh

update or add the following values

export JAVA_HOME="path  of you java"

export PATH=$JAVA_HOME/bin:$PATH

try echo $JAVA_HOME  and make sure it is showing the current version