Interested to Buy Any Domain ? << Click Here >> for more details...
difference between HashMap, Hashset and hashTable?
- 2 Answers
- 4722 Views
- HCL, Infotech, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
HashMap -
1) unsynchronized and unordered
2) Allow one null key , multiple null values
HashTable -
1) synchronized and unordered
2) Doesn't allow null key and value
HashSet -
1) synchronized and ordered
2) Sort elements in ascending order , doesn't allow duplicate elements
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / adarsh m thimmappa
HashTable is a hashing based key-value pair data structure
- doesn't allow null as key
- doesn't allow null as value as well
- not thread safe
- oldest map based data structure available since earlier versions of java
HashMap is a hashing based key-value pair data structure
- allow one null as key
- allows multiple null as more than one value
- not thread safe
HashSet is a hashing based set representation
- holds unique set of keys
- internally uses HashMap
- allows one null value
- not thread safe
| Is This Answer Correct ? | 0 Yes | 2 No |
what is a Daemon Thread?
Explain the different types of memory used by jvm?
whether the connectionpooling used in struts?
hi, All are saying that now software field position is not good and in 5-10yrs total software field ll be saturated . is it true? i am unable decide ii continue in this field or not please tell me?
What are the design considerations while making a choice between using interface and abstract class?
Explain bind(), rebind(), unbind() and lookup() methods?
can we write implementation for a method with in another method?
What are the different methods of identifying an object?
For which statements does it make sense to use a label?
What is the relationship between local interfaces and container-managed relationships?
A user of a web application sees a jsessionid argument in the URL whenever a resource is accessed. What does this mean? a. The form must have the field jsessionid b. URL rewriting is used as the session method c. Cookies are used for managing sessions
Are there books about seam?
Core Java 
