INTERVIEW QUESTIONS J2EE JAVA DETAILS

Question: What is the difference between Hashmap and Hashtable?

Answer: All the Mehods in HashTable are synchronized whereas HashMap is not thread-safe.

Another big difference is that HashMap allows null key and null values whereas HashTable does not permit null key and null values.

Submitted by Bikramjit Bardhan ([email protected])

_____________

1--HashMap is a New Java Class , where as HashTable is Old.



2—HashMap is not Synchronized where as hashTable is.



3—HashMap allows null as both key and value, where as HashTable does’nt allow null.



4—HashMap retrieval is not in order (random). HashTable provide ordered retrieval.

Submitted by Sameer Shukla ([email protected])

All the Mehods in HashTable are synchronized whereas HashMap is not thread-safe.

Another big difference is that HashMap allows null key and null values whereas HashTable does not permit null key and null values.

Submitted by Bikramjit Bardhan ([email protected])

_____________

1--HashMap is a New Java Class , where as HashTable is Old.



2—HashMap is not Synchronized where as hashTable is.



3—HashMap allows null as both key and value, where as HashTable does’nt allow null.



4—HashMap retrieval is not in order (random). HashTable provide ordered retrieval.

Submitted by Sameer Shukla ([email protected]) Source: CoolInterview.com

Hash table is thread safe, hash map is not Source: CoolInterview.com

If you have the better answer, then send it to us. We will display your answer after the approval.

Rules to Post Answers in CoolInterview.com:-

• There should not be any Spelling Mistakes.
• There should not be any Gramatical Errors.
• Answers must not contain any bad words.
• Answers should not be the repeat of same answer, already approved.
• Answer should be complete in itself.

Name :*
Email Id :*
Answer :*
Verification Code	Not readable? Load New Code
Enter the above shown code: *
	Inform me about updated answers to this question