Class diagram of Map API

This post helps you understand overview about Map API in the Java Collections Framework.

You know, a map stores elements in terms of key=value pair. Map<K, V> is the base interface for all kind of maps.

• Map Sub interfaces: ConcurrentMap<K, V>, SortedMap<K, V>, NavigableMap<K, V> and ConcurrentNavigableMap<K, V>.
• Map Abstract classes: AbstractMap<E>.
• Map Implementation classes:
  • Hashtable<K, V>
  • HashMap<K, V>
  • LinkedHashMap<K, V>
  • IdentityHashMap<K, V>
  • ConcurrentHashMap<K, V>
  • ConcurrentSkipListMap<K, V>
  • EnumMap<K extends Enum<K>, V>
  • WeakHashMap<K, V>
  • TreeMap<K, V>

The following class diagram outlines the hierarchy of Map API:

Related Java Map Tutorials:

• Java Map Tutorial
• Java NavigableMap and TreeMap Tutorial
• Java SortedMap and TreeMap Tutorial

Other Java Collections Tutorials:

• What is Java Collections Framework?
• Java Set Tutorial
• Java List Tutorial
• Java Queue Tutorial
• Understand equals and hashCode
• Understand object ordering

About the Author:

Nam Ha Minh is certified Java programmer (SCJP and SCWCD). He began programming with Java back in the days of Java 1.4 and has been passionate about it ever since. You can connect with him on Facebook and watch his Java videos on YouTube.