Java concepts

This post contains the compilation of some of the most popular java design questions that every java developer should be aware of.

• ThreadLocal explained in Detail.

This is a very well written article that explains the use of ThreadLocal with example

http://www.ibm.com/developerworks/java/library/j-threads3.html

• Why multiple inheritance is not for java?

This question come to any developer's mind who has worked in C++. This is a very nice article that explains exactly this.

http://www.javaworld.com/javaqa/2002-07/02-qa-0719-multinheritance.html

• Diamond shape problem solved.

How multiple inheritance is achieved in java with the help of interfaces.

http://www.javaworld.com/javaworld/jw-12-1998/jw-12-techniques.html

• What is the difference b/w weak and soft references?

http://stackoverflow.com/questions/299659/what-is-the-difference-between-a-soft-reference-and-a-weak-reference-in-java

• Weak References explained in detail

http://www.ibm.com/developerworks/java/library/j-jtp11225/

• Soft References explained in detail

http://www.ibm.com/developerworks/java/library/j-jtp01246.html

• Static Factory pattern example: class instance which is created at the time of Static member initialization. This Factory always returns this instance.

http://alexmcferron.com/staticFactory.html

• Static method Pattern example: This pattern is just a style of decoupling object initialization from the client code. It always returns a new class instance.

http://www.javaworld.com/javaworld/javaqa/2001-05/02-qa-0511-factory.html