Ubuntu12.04 jdk-7u5-linux-x64 Installation

Copy the supervisor to the/usr/lib/jvm/directory and run the following command: sudocp-r ~ /Download/jdk-7u5-linux-x64.tar.gz if there is no jvm folder here, create the folder, command: sudomkdirjvm enter/usr/lib/jvm

1. First download jdk-7u5-linux-x64.tar.gz to oracle.cn

2. Copy jdk-7u5-linux-x64.tar.gz to the/usr/lib/jvm/directory,

Command:

Sudo cp-r ~ /Download/jdk-7u5-linux-x64.tar.gz

If there is no jvm folder, create the folder. command:

Sudo mkdir jvm

Go to the/usr/lib/jvm directory

Cd/usr/lib/jvm

Decompress the file to the following command:

Sudo tar-zxvf jdk-7u5-linux-x64.tar.gz

3. Set environment variables and use gedit to open the/etc/profile file.

Sudo gedit/etc/profile

Add the following at the end of the file:

Export JAVA_HOME =/usr/lib/jdk1.7.0 _ 05

Export PATH = $ JAVA_HOME/bin: $ JAVA_HOME/jre/bin: $ PATH

Export CLASSPATH = $ CLASSPATH:.: $ JAVA_HOME/lib: $ JAVA_HOME/jre/lib

4. Modify the default jdk.

$ Sudo update-alternatives -- install/usr/bin/java/usr/lib/jvm/jdk1.7.0 _ 05/bin/java 300

$ Sudo update-alternatives -- install/usr/bin/javac/usr/lib/jvm/JDK 1.7.0 _ 05/bin/javac 300

$ Sudo update-alternatives -- config java

$ Sudo update-alternatives -- config javac

5. Check and enter the command line:

Java-version

The following result is displayed, indicating that the configuration is complete.

Java version "1.7.0 _ 05"

Java (TM) SE Runtime Environment (build 1.7.0 _ 05-b05)

Java HotSpot (TM) 64-Bit Server VM (build 23.1-b03, mixed mode)