How to install oracle java 7.0.80 centos 7 from tar.gz

cd /opt/jdk1.8.0_171/
alternatives --install /usr/bin/java java /opt/jdk1.8.0_171/bin/java 2
alternatives --config java


There are 3 programs which provide 'java'.

  Selection    Command
-----------------------------------------------
*  1           /opt/jdk1.7.0_71/bin/java
 + 2           /opt/jdk1.8.0_45/bin/java
   3           /opt/jdk1.8.0_144/bin/java
   4           /opt/jdk1.8.0_171/bin/java

Enter to keep the current selection[+], or type selection number: 4

alternatives --install /usr/bin/jar jar /opt/jdk1.8.0_171/bin/jar 2
alternatives --install /usr/bin/javac javac /opt/jdk1.8.0_171/bin/javac 2
alternatives --set jar /opt/jdk1.8.0_171/bin/jar
alternatives --set javac /opt/jdk1.8.0_171/bin/javac

java -version

java version "1.8.0_171"
Java(TM) SE Runtime Environment (build 1.8.0_171-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)