Linux CentOS 7 under JDK 1.7 installation and configuration

Download

The first is JDK 1.7 64bit & 32bit:

Jdk-7u79-linux-x64.tar.gz (http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.tar.gz) Jdk-7u79-linux-i586.tar.gz (http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-i586.tar.gz) Check and Uninstall OpenJDK

The first step is to check if the system has its own OPENJDK and the associated installation package, and if so, uninstall it first.

Check command:

Java-versionrpm-qa | grep java

If you find that you have installed OPENJDK and installed packages, then perform the uninstallation in turn first.

Uninstall command:

Rpm-e–nodeps tzdata-java-2012c-1.el6.noarchrpm-e–nodeps java-1.6.0-openjdk-1.6.0.0-1.45.1.11.1.el6.x86_64

Direct copy of the above command to Xshell error, be careful to note the front of the –nodeps two bars, pay attention to self-modification.

Unzip the installation

After uploading the installation files to the Linux server, go to the directory to perform the decompression installation:

TAR-ZXVF jdk-7u75-linux-x64.tar.gz

After the decompression is complete, create a new Java directory and move the JDK directory you just unzipped to the directory we created:

MKDIR/WOCLOUD/JAVAMV./jdk1.7.0_75/wocloud/java/

Finally, delete the installation files:

RM-RF jdk-7u75-linux-x64.gz

Configuring Environment variables

After the installation is complete, you need to configure the environment variables and edit the/etc/profile file:

Vi/etc/profile Add the following configuration at the end of the file: Export java_home=/wocloud/java/jdk1.7.0_75 export classpath=.: $JAVA _home/jre/lib/rt.jar : $JAVA _home/lib/dt.jar: $JAVA _home/lib/tools.jar export path= $PATH: $JAVA _home/bin

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After editing, remember to enter: Wq save exit, the last step is to reload the/etc/profile file via the source command, so that the modified content is valid in the current shell window:

Source/etc/profile

Test

Enter Java-version to view the JDK version information:

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Linux CentOS 7 under JDK 1.7 installation and configuration