map : Java Glossary

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map

Geographical Maps

Java Maps

In Java, java.util.Map is the interface that Collections implement when they are capable of looking something up by key.

Many classes implement it including: AbstractMap, Attributes, AuthProvider, ConcurrentHashMap, EnumMap, HashMap, Hashtable, IdentityHashMap, LinkedHashMap, PrinterStateReasons, Properties, Provider, RenderingHints, TabularDataSupport, TreeMap, UIDefaults and WeakHashMap.

All Maps support put( key, value) and get( key).

Note that Collections that look up by an int index such as ArrayList and Vector are not considered Maps. They are Lists.

Learning More

Sun’s Javadoc on java.util.Map : available:

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