Ubuntu Install Java

First, download

First of all, of course it is to download.

Address: http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html

Select a different version as needed. The author chooses the jdk-7u45,

Second, decompression

Unzip the downloaded. tar.gz file.

Use the following command to extract:

sudo tar zxvf./jdk-7u45-linux-x64.tar.gz

For ease of administration, you can move the extracted files to another folder.

You can do it without doing it.

The author moved the file to the/opt/java/jdk/directory.

To facilitate the next set of environment variables, change the folder to a short name--jdk1.7

You can rename a folder by using the following command

sudo mv jdk1.7.0_45/jdk1.7/

Third, set environment variables

Edit the. bashrc file.

Enter the following command at the terminal:

VI ~/.BASHRC

At the end of the file, add the following lines of code:

Export java_home=/opt/java/jdk/jdk1.7 export Classpath=${java_home}/libexport path=${java_home}/bin: $PATH

In order for the changes to take effect immediately, execute the following command at the terminal:

SOURCE ~/.BASHRC

P.S. It is best to back up the backup command before modifying the. bashrc file:

CP. BASHRC. bash_original

Iv. Verification

With the above steps, the JDK is installed.

Enter the following command to verify the java-version ,

Ubuntu Install Java