AbstractMap

All Classes

Summary:
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Field |
Constr |
Method

Detail:
Field |
Constr |
Method

java.lang.Object
- net.datastructures.AbstractMap<K,V>

All Implemented Interfaces:

Map<K,V>

Direct Known Subclasses:

AbstractHashMap, AbstractSortedMap, UnsortedTableMap
```
public abstract class AbstractMap<K,V>
extends Object
implements Map<K,V>
```
An abstract base class to ease the implementation of the Map interface. The base class provides three means of support: 1) It provides an isEmpty implementation based upon the abstract size() method. 2) It defines a protected MapEntry class as a concrete implementation of the entry interface 3) It provides implemenations of the keySet and values methods, based upon use of a presumed implementation of the entrySet method.

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`protected static class`	`AbstractMap.MapEntry<K,V>` A concrete implementation of the Entry interface to be used within a Map implementation.

Constructor Summary

Constructors
Constructor and Description

AbstractMap()

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`isEmpty()` Tests whether the map is empty.
`Iterable<K>`	`keySet()` Returns an iterable collection of the keys contained in the map.
`Iterable<V>`	`values()` Returns an iterable collection of the values contained in the map.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface net.datastructures.Map
entrySet, get, put, remove, size

- Constructor Detail
  - AbstractMap
```
public AbstractMap()
```
- Method Detail
  - isEmpty
```
public boolean isEmpty()
```
    Tests whether the map is empty.
    
    Specified by:
    
    isEmpty in interface Map<K,V>
    
    Returns:
    true if the map is empty, false otherwise
  - keySet
```
public Iterable<K> keySet()
```
    Returns an iterable collection of the keys contained in the map.
    
    Specified by:
    
    keySet in interface Map<K,V>
    
    Returns:
    iterable collection of the map's keys
  - values
```
public Iterable<V> values()
```
    Returns an iterable collection of the values contained in the map. Note that the same value will be given multiple times in the result if it is associated with multiple keys.
    
    Specified by:
    
    values in interface Map<K,V>
    
    Returns:
    iterable collection of the map's values

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