Question synchronized

[Dinesh Tahiliani]

Hello ranchers,

Bettwen Hastable and HashMap.HashMap is synchronize / hashtable. Can anyone tell correct answer.
If HashMap is synchronized , then how can we synchronized it.
Same for Vector, Arraylist and LinkeList, among these which one is synchronized. How can we synchronized them.

Thanks
Dinesh

[Nadeem Khan]

I think Hashtable is synchronized. And these are standard java API and if one of them is synchronized, that simply means that their implementation present in API provides a synchornized access! But you can apply your own synchronization methods/blocks while using them in your code!

[Sunny Malik]

Hashtable is synchronized not Hashtable
Vector is synchronized not ArrayList
you do not need to worry about synchronization while using these collection...synchronized means methods in that classs are synchronized

[Rah Gupta]

Hello,

There are two ways to make a hashmap synchronized. One is to call synchronized Map on Collections class and 2nd is to make your own class.
For eg.

Class MyMap extends HashMap {


public synchronized void put(...) {
super.put(...);
}

public synchronized void get(...) {
super.put(...);
}
}

similarly you can synchronized all the methods. So intead of creating an object of HashMap you will be creating an object og MyMap