Distributed system - basics - CentOS7 installation jdk1.8

1. Check whether the system is in accordance with java

$: rpm -qa | grep java

2 , delete the installed java

$:yum –y remove java

 

3. Unzip java to /usr/local/jdk1.8 _

$:tar -zxvf Downloads/jdk-8u101-linux-x64\(1\).tar.gz
-C /usr/local/

4. Rename java

$: mv /usr/local/jdk1.8.0_101/ /usr/local/jdk1.8

5. Configure environment variables

$:vi /etc/profile

Configuration:

export JAVA_HOME=/usr/local/jdk1.8

export PATH=$JAVA_HOME/bin:$PATH

export
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

The configuration takes effect immediately

source /ect/profile

6. Verify that java is installed successfully

$:Java

$:Javac