2.6.3. OpenJDK 7

Use the following instructions to manually install OpenJDK 7:

Check the version. From a terminal window, type:
```
java -version
```
(Optional) Uninstall the Java package if the JDK version is less than 7.
```
rpm -qa | grep java
yum remove {java-1.*}
```
(Optional) Verify that the default Java package is uninstalled.
```
which java
```

Download OpenJDK 7 RPMs. From the command-line, run:

yum install java-1.7.0-openjdk java-1.7.0-openjdk-devel

Create symbolic links (symlinks) to the JDK.

mkdir /usr/java
ln -s /usr/openjdk1.7.0/openjdk1.7.0 /usr/java/default
ln -s /usr/java/default/bin/java /usr/bin/java

Set up your environment to define JAVA_HOME to put the Java Virtual Machine and the Java compiler on your path.
```
export JAVA_HOME=/usr/java/default
export PATH=$JAVA_HOME/bin:$PATH
```
Verify if Java is installed in your environment. Execute the following from the command-line console:
```
java -version
```
You should see output similar to the following:
```
openjdk version "1.7.0"
OpenJDK Runtime Environment (build 1.7.0)
OpenJDK Client VM (build 20.6-b01, mixed mode)
```