Hashmap is not Synchronized where as Hashtable is Synchronized. Hashm

what is Hashmap & Hashtable wirh example?

Question Posted / sivadasan

Answer Posted / sivadasan

Hashmap is not Synchronized where as Hashtable is
Synchronized.

Hashmap allows null values as keys.
Hashtable doesn't allows null values as keys.

Is This Answer Correct ?

3 Yes

6 No

Please Help Members By Posting Answers For Below Questions

How variables are declared?

981

what is aggregation in java?

1016

Which is better singleton or static class?

987

why an outer class cannot be declared as private?

4321

What are memory tables?

1096

Explain the polymorphism principle?

1019

What is number data type in java?

1014

what are synchronized methods and synchronized statements? : Java thread

997

Why collection doesn’t extend cloneable and serializable interfaces?

1104

Can you give names of Container classes?

2306

Why hashcode is used in java?

973

how to one war file class to another war file class?

2077

What are the classes of java?

968

Can we have return statement in finally clause? What will happen?

964

Can we pass a primitive type by reference in java? How

933