Ubuntu 14.04 Configuration Java SE

First download Java se,:http://www.oracle.com/technetwork/java/javase/downloads/index.html;

After downloading the compressed package to the custom directory decompression can be (for example: In the/usr/lib/set up a Java directory, the compression package extracted into the directory);

There are two ways of configuring environment variables:

1, modify BASHRC:

sudo nano ~/.BASHRC

Then add the following code:

Export java_home=/usr/lib/java/jdk1.8.0_20/

Export JRE_HOME=${JAVA_HOME}/JRE

Export Classpath=.:${java_home}/lib:${jre_home}/lib

Export Path=${java_home}/bin: $PATH

2, Modify Environment:

sudo nano/etc/environment

Add the Bin directory of the JDK after the existing path variable, and note that the colon is separated from the existing variable

Add Calsspath and Java_home variables again

My situation is as follows:

Path= "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/java/ Jdk1.8.0_20/bin "

Classpath= "/usr/lib/java/jdk1.8.0_20/lib:." Notice there's a point in the back.

Java_home= "/usr/lib/java/jdk1.8.0_20/"

After modifying the configuration, log off or restart to make the environment variable effective!

See if it takes effect, terminal execution: java-version, you can see the version.

Ubuntu 14.04 Configuration Java SE