need help on synchronized

[Mike Liu]

Hi, can some one explain the difference between the following methods?
public void push(char c){
synchronized(this){
\\code
}
}
public synchronized push(char c){
\\code
}
thanks for helping me out

[Rajinder Yadav]

if it's not obvious, one sync's on the current object in a code block and the other sync's on the current object during the entire execution of the method.
The first is a more fine-grain way to perform sync's on shared resources.