Linux installation JDK

1.

First, use the command to see if the JDK is installed.

Java-version

If the version number description is already installed if it does not appear, continue

2.

Download the appropriate JDK I downloaded is jdk1.8.0_20

Http://www.oracle.com/technetwork/java/javase/downloads/index.html

Unzip to jdk1.8.0_20 after download

3. Execute under terminal command: sudo mv jdk1.8.0_20/usr/lib/jvm/

4. Modify the configuration file

sudo vi ~/.profile

At the end, add

Export java_home=/usr/lib/jvm/jdk1.8. 0_20export jre_home=/usr/lib/jvm/jdk1.8.0_20/
Export CLASSPATH=.:$JAVA _home/lib/dt.jar:$JAVA _home/lib/tools.jar:$JAVA _home/ Lib:$JRE _home/lib:$CLASSPATH  export PATH=$JAVA _home/bin:$PATH

And then save the close

5. Immediate effect

SOURCE ~/.profile

At this point, you can see the version number with the command java-version successfully installed

Linux installation JDK