Oracle Linux 6 U3 comes with Open-JDK 1.6 and 1.7, 1.7 is the default jvm.

java -version

java version "1.7.0_45"
OpenJDK Runtime Environment (rhel-2.4.3.2.0.1.el6_4-x86_64 u45-b15)
OpenJDK 64-Bit Server VM (build 24.45-b08, mixed mode)

Both open-JDK 1.6 and 1.7 are installed under: /usr/lib/jvm/

Oracle Linux uses "alternatives" to manage soft links.

alternatives --config java --Select a default from all installed jre

alternatives --display java

To install JRE 1.6.0_4 64bit:

1. Download rpm.bin from

2. Login as root

3. chmod +x jre-6u45-linux-x64-rpm.bi

4. ./jre-6u45-linux-x64-rpm.bin

By default, Oracle JRE is installed in /usr/java/

5. Install with alternatives --install command

alternatives --install /usr/bin/java java /usr/java/jre1.6.0_45/bin/java 20000

alternatives --install /usr/bin/javaws javaws /usr/java/jre1.6.0_45/bin/javaws 20000

alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/jre1.6.0_45/lib/amd64/libnpjp2.so 20000

alternatives --config java --Select newly installed jre

alternatives --config javaws --Select newly installed jre

6. Change user to oracle, and set $JAVA_HOME in your .profile.

JAVA_HOME=/usr/java/jre1.6.0_45/; export JAVA_HOME

source ~/.bash_profile

7. Verify

java -version

javaws

echo $JAVA_HOME

Open firefox(64 bit) and type "about:plugins" in the address bar.

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Oracle Linux JRE Study