This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Suresh KumarPandey wrote:I am not getting when to use synchronized(this) and when it is used
Any two (or more) threads that should be prevented from working on the same data simultaneously, can (as an option) be synchronized on the same instance. In this regard, synchronized(this) is just a design option. You need to use synchronization to help with thread-safety, and there is no set of rules that says that you have to use the "this" reference for a particular use case.