Maps in java collections

There is Map interface in java, but also there are other interfaces like SortedMap and Map.Entry interfaces. This tutorial will cover following:

Introduction to Maps in java

Map interfaces

• Map implemented by HashMap and TreeMap
  Map Interface methods
• SortedMap implemented by TreeMap.
  SortedMap interface methods
• Map.Entry which describes access methods to the key-value pairs.
  Map.Entry interface methods

Classes Implementing Map

• HashMap in java
• TreeMap in java
• HashTable in java
• IdentityHashMap
• WeakHashMap
• LinkedHashMap
• Properties class

 

Iterating over a Map

Comparison of maps to Hashtable

Basic Operations on Maps

Bulk Operations on Maps

Collection Views for Maps

Fancy Uses of Collection-Views: Map Algebra

Multimaps

Examples
Creating a weak hashmap
Creating a hashmap in java
Creating a Map That Retains Order-of-Insertion
Creating type-specific map