Install JDK 1.8.0 _ 25 on Ubuntu 14.04 and configure Environment Variables

Install JDK 1.8.0 _ 25 on Ubuntu 14.04 and configure Environment Variables

The following are notes about installing JDK 1.8.0 _ 25 on Ubuntu 14.04 and configuring environment variables.

1. source code package preparation:

First, download jdk and supervisor from the official website.

2. decompress the source code package.

Create a java folder in the/usr/local directory on the terminal and run the following command:

2. decompress the source code package.
Create a java folder in the/usr/local directory on the terminal and run the following command:

Sudo mkdir/usr/local/java

Copy the downloaded package to the java folder and run the following command:
Go to the directory where the jdk source code package is located

Cp jdk-8u25-linux-x64.tar.gz/usr/local/java

Go to the java directory and run the following command:

Cd/usr/local/java

Decompress the package and run the following command:

Sudo tar xvf jdk-8u25-linux-x64.tar.gz

Then you can delete the compressed package. command line:

Sudo rm jdk-8u25-linux-x64.tar.gz

3. Set jdk Environment Variables

The global setting method is used, which is an environment variable shared by all users.

$ Sudo gedit ~ /. Bashrc

As shown in:

Open and add at the end

Export JAVA_HOME =/usr/local/java/jdk1.8.0 _ 25
Export JRE_HOME =$ {JAVA_HOME}/jre
Export CLASSPATH =. :$ {JAVA_HOME}/lib :$ {JRE_HOME}/lib
Export PATH =$ {JAVA_HOME}/bin: $ PATH

Remember, do not add spaces on both sides of the equal sign during the above process. Otherwise, "invalid identifiers" will appear, because unnecessary spaces cannot be identified during source/etc/profile, it is understood as part of the path.
Save the settings.

4. Check whether the installation is successful.
Enter the following command on the terminal:
Java-version
Check whether the installation is successful
The result is as follows:

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