i am looking for site to best update my java...

the question is is there any java site that theses programs are based off of... and if so what java source do anyone recommend. i dont want to get a java update from a bad source with viruses or worst a source that might not work with all java based programs with poorly written java sources with memory leaks, etc.... i am not a developer i just the best to run applications.....

i know there is:

java.sun.com
NetBeans IDE + JDK 5.0 Update 5
J2EE 1.4 includes JDK 5.0
JDK 5.0 Update 5 includes the JVM technology
JRE 5.0 Update 5 includes the JVM technology