The Basic Applet Life Cycle

http://www.cafeaulait.org/course/week5/27.html

wrapper class

http://en.wikipedia.org/wiki/Wrapper_class
http://www.roseindia.net/java/wrapper-class/

explain different types of inheritance with suitable examples

http://www.roseindia.net/java/language/inheritance.shtml

JVM

This links:

http://dret.net/glossary/jvm

http://way2freshers.com/interview-questions/what-is-jvm-in-javaa-brief-description.html

Life Cycle of thraed

You will get information from this link
http://www.roseindia.net/java/thread/life-cycle-of-threads.shtml