Please Any one help me what is Synchronization? Why iam asking this one ? I got the answer from this question (diff. between Vector and Arraylist).
Vector is syncronized. Arraylist is not syncronized.
Joined: Jan 29, 2003
Hi, welcome to the ranch!
Synchronization is used in multi-threaded programs to make sure that only one thread gets into a sensitive code block at a time. If I have code that might be run by two threads and it does something as simple as:
it is possible for another thread to change the value of memberVariable between the time I set it and the time I test it and the method might not print YES. If I make the method synchronized, the compiler adds code to guarantee that only one thread gets into this method at a time, and the method will always print YES.
This is a silly example, but real apps often have resources that are shared by many threads yet have to be modified by only one at a time.
See if Thinking in Java or this Sun Tutorial help you get into threading. The ranch has a forum just up the page all about threading if you want to take future questions there.
A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi
Joined: Jul 11, 2001
Moving to Threads and Synchronization...
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