集合類之間的關系總結

Map接口常用的子類:

• HashMap:

extends AbstractMap<K,V>  implements Map<K,V>, Cloneable, Serializable 無序存放,新的操作類,key不允許重複

• Hashtable:

extends Dictionary<K,V>implements Map<K,V>, Cloneable, java.io.Serializable無序存放,舊的操作類,key不允許重複

• TreeMap:

extends AbstractMap<K,V> implements NavigableMap<K,V>, Cloneable, java.io.Serializable可以排序的Map集合,按集合的key排序,key不允許重複

• WeakHashMap:

 extends AbstractMap<K,V>implements Map<K,V>弱引用的Map集合,清除集合中不再使用的内容,使用gc進行回收

• IdentityHashMap: 

extends AbstractMap<K,V> implements  Map<K,V>, java.io.Serializable, Cloneable可以重複的Map集合

public interface Map<K,V>
           

WeakHashMap<K,V> extends AbstractMap<K,V> implements Map<K,V>
           

public abstract class AbstractMap<K,V> implements Map<K,V>
           

public abstract class AbstractMap<K,V> implements Map<K,V>
           

public abstract class AbstractSet<E> extends AbstractCollection<E> implements Set<E>
           

HashSet<E>  extends AbstractSet<E> implements Set<E>, Cloneable, java.io.Serializable
           

LinkedList<E> extends AbstractSequentialList<E>implements List<E>, Deque<E>, Cloneable, java.io.Serializable
           

public abstract class AbstractSequentialList<E> extends AbstractList<E>
           

HashSet<E> extends AbstractSet<E> implements Set<E>, Cloneable, java.io.Serializable
           

public abstract class AbstractSet<E> extends AbstractCollection<E> implements Set<E>