java installation and configuration in centos

Install and configure the java environment

[root@JxateiLinux src]# Wget  http://download.oracle.com/otn-pub/java/jdk/8u161-b12/2f38c3b165be4555a1fa6e98c45e0808/jdk-8u161-linux-x64.tar.gz?AuthParam=1517116273_f97a52606c91628e0c57ea1f702b885d

[root@JxateiLinux src]# tar  zxvf  jdk-8u161-linux-x64.tar.gz\?AuthParam\=1517114251_0e387d4f537ca5e37a240f0b6c796f76

[root@JxateiLinux src]# mkdir /usr/java #Create    java directory

[root@JxateiLinux src]# cp -r jdk1.8.0_161/  /usr/java/jdk1.8

[root@JxateiLinux java]# vi /etc/profile #Configure the     Java environment

export JAVA_HOME=/usr/java/jdk1.8

export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/tools.jar

export PATH=$PATH:$JAVA_HOME/bin

[root@JxateiLinux ~]#java

[root@JxateiLinux ~]# javac

-bash: javac: command not found

[root@JxateiLinux ~]# yum install java-1.8.0-openjdk-devel.x86_64 #Solve    the problem of javac

It has been installed:

  java-1.8.0-openjdk-devel.x86_64 1:1.8.0.161-3.b14.el6_9                                                                            

complete!