Difference between HashMap and Map in Java..?

java hashmap
user1252812 picture user1252812 · Mar 6, 2012 · Viewed 148.2k times · Source

Possible Duplicate:
Java - HashMap vs Map objects

I want to know the difference between HashMap and Map in java..??

Answer

Lars Kotthoff picture Lars Kotthoff · Mar 6, 2012

Map is an interface, i.e. an abstract "thing" that defines how something can be used. HashMap is an implementation of that interface.

Related questions

Iterate through a HashMap

What's the best way to iterate over the items in a HashMap?

Read More
What are the differences between a HashMap and a Hashtable in Java?

What are the differences between a HashMap and a Hashtable in Java? Which is more efficient for non-threaded applications?

Read More
Java Hashmap: How to get key from value?

If I have the value "foo", and a HashMap<String> ftw for which ftw.containsValue("foo") returns true, how can I get the corresponding key? Do I have to loop through the hashmap? What is the best way …

Read More