Java error failure during installation of Data Protection Oracle

The following errors are encountered during the installation.

Initializing Wizard......
Launching InstallShield Wizard........
Exception in thread "main" java.lang.NoClassDefFoundError:
run at java.lang.Class.initializeClass(libgcj.so.7rh)
Caused by: java.lang.ClassNotFoundException:
sun.net.www.protocol.jar.URLJarFileCallBack not found in
gnu.gcj.runtime.SystemClassLoader{urls=[file:./,file:./,file:./,file:/tm
p/istemp12765287201132/setup.jar,file:./,file:./,file:./],
parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}
at java.net.URLClassLoader.findClass(libgcj.so.7rh)
at java.lang.ClassLoader.loadClass(libgcj.so.7rh)
at java.lang.ClassLoader.loadClass(libgcj.so.7rh)
at java.lang.Class.initializeClass(libgcj.so.7rh)

IBM Java is not installed on the system.

SUN (GNU libgcj) java does not support the Data Protection for Oracle installation and it requires IBM java to be installed on the system.

Following are the steps to resolve:

1. Install IBM Java 1.4.2.1 or later from the following IBM Link
http://www.ibm.com/developerworks/java/jdk/linux/download.html
Note: Make sure that GNU will does not show up in the "Java -version" output after installing the IBM
Java.
2. Assuming that IBM java is installed in '/usr/lib/java/bin', export the following variable:

export PATH=:/usr/lib/java/bin:$PATH:

3. Retry the installation.