Install JDK 7 on CentOS and JDK 7 on centos

Install JDK 7 on CentOS and JDK 7 on centos
1. Download jdk

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

Select jdk-7u75-linux-x64.rpm

2. Install jdk

Create directoryMkdir/usr/java

Switch to the download directory and copy the downloaded file/Usr/java cp jdk-7u75-linux-x64.rpm/usr/java

Switch to/usr/java to modify permissionsChmod + x jdk-7u75-linux-x64.rpm

RunRpm-ivh jdk-7u75-linux-x64.rpm

3. environment variable configuration

Vi/etc/profile

Add at the end:

# Set java environment

Export JAVA_HOME =/usr/java/jdk1.7.0 _ 75

Export CLASSPATH =.: $ JAVA_HOME/lib/dt. jar: $ JAVA_HOME/lib/tools. jar

Export PATH = $ PATH: $ JAVA_HOME/binexport JAVA_HOME CLASSPATH PATH

Save and exit: X

Enable environment variable Configuration: Source/etc/profile

Establish a connection:

Cd/usr/bin

Ln-s-f/usr/java/jdk1.7.0 _ 75/jre/bin/java

Ln-s-f/usr/java/jdk1.7.0 _ 75/bin/javac

4. Detection

Java-version javac