volatile and synchornized

[goldhouse]

volatile make sure the the class variable is latest. synchorized make sure only one thread access it . Cant we replace the volatile with the synchornized ?

[goldhouse]

Yes , I got a reason for making the two as different .
Look we have scenario like this say we have two threads

First thread need to set the variable for the next thread
Second thread comes & checks the variable & finds it's not set , it return without doing it's task

Only volatile can solve this problem

So the conclusion is volatile is not a replacement for synchronization and vice versa

[ingle.anil]

its call cheep read n write approach.

[danielstoner]

Read this: Java theory and practice: Managing volatility

and this:
Use synchronized or volatile when accessing shared variables