Weblogic Installation Error version 10.3.6 linux

Hi there I am trying install weblogic server in my redhat linux environment.

Weblogic version : 10.3.6

Linux : Red Hat Enterprise Linux Server release 5.2 (Tikanga)

Java: java version "1.4.2"

Just starting the installation I am getting the following errors :

[oracle@ora11g Linux-based]$ java wls1036_generic.jar

Exception in thread "main" java.lang.NoClassDefFoundError: wls1036_generic.jar

   at gnu.java.lang.MainThread.run(libgcj.so.7rh)

Caused by: java.lang.ClassNotFoundException: wls1036_generic.jar not found in gnu.gcj.runtime.SystemClassLoader{urls=[file:./], parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}

   at java.net.URLClassLoader.findClass(libgcj.so.7rh)

   at gnu.gcj.runtime.SystemClassLoader.findClass(libgcj.so.7rh)