hashmap (java platform se 7 )

7/25/2019 HashMap (Java Platform SE 7 )

1/9

HashMap
http://docs.oracle.com/javase/7/docs/api/java/util/Collections.html#synchronizedMap(java.util.Map)http://docs.oracle.com/javase/7/docs/api/java/util/Collections.html#synchronizedMap(java.util.Map)http://docs.oracle.com/javase/7/docs/api/java/util/Collections.html#synchronizedMap(java.util.Map)http://docs.oracle.com/javase/7/docs/api/java/util/Collections.html#synchronizedMap(java.util.Map)http://docs.oracle.com/javase/7/docs/api/java/util/Collections.html#synchronizedMap(java.util.Map)http://docs.oracle.com/javase/7/docs/api/java/util/Collections.html#synchronizedMap(java.util.Map)http://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Cloneable.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/LinkedHashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/javax/print/attribute/standard/PrinterStateReasons.htmlhttp://docs.oracle.com/javase/7/docs/api/java/io/Serializable.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Cloneable.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Object.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/GregorianCalendar.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashSet.htmlhttp://docs.oracle.com/javase/7/docs/api/index.html?java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/allclasses-noframe.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/io/Serializable.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Object.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/LinkedHashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Cloneable.htmlhttp://docs.oracle.com/javase/7/docs/api/index.html?java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/package-tree.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/GregorianCalendar.htmlhttp://docs.oracle.com/javase/7/docs/api/overview-summary.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Cloneable.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/javax/print/attribute/standard/PrinterStateReasons.htmlhttp://docs.oracle.com/javase/7/docs/api/deprecated-list.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/package-summary.htmlhttp://docs.oracle.com/javase/7/docs/api/index-files/index-1.htmlhttp://docs.oracle.com/javase/7/docs/api/java/io/Serializable.htmlhttp://docs.oracle.com/javase/7/docs/api/help-doc.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/util/HashSet.htmlhttp://docs.oracle.com/javase/7/docs/api/allclasses-noframe.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Collections.html#synchronizedMap(java.util.Map)http://docs.oracle.com/javase/7/docs/api/java/util/class-use/HashMap.htmlhttp://-/?-


2/9

HashMap

HashMap

HashMap

HashMap Map K V

clear

Object clone

containsKey Object

containsValue Object
http://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.SimpleImmutableEntry.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Collection.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Object.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.SimpleEntry.htmlhttp://docs.oracle.com/javase/7/docs/api/serialized-form.html#java.util.HashMaphttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Hashtable.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.SimpleImmutableEntry.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.SimpleEntry.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.SimpleImmutableEntry.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#hashCode()http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/technotes/guides/collections/index.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.SimpleEntry.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/ConcurrentModificationException.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/lang/Object.htmlhttp://-/?-http://-/?-http://-/?-http://docs.oracle.com/javase/7/docs/api/java/lang/Object.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/TreeMap.html


3/9

Set Map.Entry K V entrySet Set

V get Object

isEmpty

Set K keySet Set

V put K V

putAll Map K V

V remove Object

size

Collection V values Collection
http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/util/Set.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#finalize()http://docs.oracle.com/javase/7/docs/api/java/util/Map.html#equals(java.lang.Object)http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#toString()http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#getClass()http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/util/Map.Entry.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.html#hashCode()http://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/util/Collection.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#wait(long,%20int)http://-/?-http://-/?-http://docs.oracle.com/javase/7/docs/api/java/lang/Object.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#wait(long)http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#notifyAll()http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#wait()http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Object.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#notify()http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Object.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#hashCode()http://docs.oracle.com/javase/7/docs/api/java/util/Set.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Set.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#equals(java.lang.Object)http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Collection.htmlhttp://-/?-http://-/?-http://docs.oracle.com/javase/7/docs/api/java/util/Set.html


4/9
http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.html#size()http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/NullPointerException.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#size()http://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.html


5/9
http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.html#isEmpty()http://docs.oracle.com/javase/7/docs/api/java/util/Map.html#containsKey(java.lang.Object)http://docs.oracle.com/javase/7/docs/api/java/lang/Object.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.html#get(java.lang.Object)http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#containsKey(java.lang.Object)http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#isEmpty()http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Object.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#get(java.lang.Object)http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.html


6/9
http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Object.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#putAll(java.util.Map)http://docs.oracle.com/javase/7/docs/api/java/lang/NullPointerException.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.html#put(K,%20V)http://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#remove(java.lang.Object)http://docs.oracle.com/javase/7/docs/api/java/util/Map.html#remove(java.lang.Object)http://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.html#putAll(java.util.Map)http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#put(K,%20V)http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.html


7/9
http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#clone()http://docs.oracle.com/javase/7/docs/api/java/util/Map.html#clear()http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.html#containsValue(java.lang.Object)http://docs.oracle.com/javase/7/docs/api/java/lang/Cloneable.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Set.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#containsValue(java.lang.Object)http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Object.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#clear()http://docs.oracle.com/javase/7/docs/api/java/util/Set.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/lang/Object.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.html


8/9
http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.html#values()http://docs.oracle.com/javase/7/docs/api/java/util/Set.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#values()http://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Set.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Collection.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#keySet()http://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.html#entrySet()http://docs.oracle.com/javase/7/docs/api/java/util/Map.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.html#entrySet()http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.html#keySet()http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Collection.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/Map.Entry.html


9/9
http://docs.oracle.com/javase/7/docs/api/java/util/HashSet.htmlhttp://docs.oracle.com/javase/7/docs/legal/cpyr.htmlhttp://docs.oracle.com/javase/7/docs/api/help-doc.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/java/util/class-use/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/GregorianCalendar.htmlhttp://docs.oracle.com/javase/7/docs/api/overview-summary.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/package-summary.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/allclasses-noframe.htmlhttp://-/?-http://-/?-http://docs.oracle.com/javase/7/docs/index.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/package-tree.htmlhttp://-/?-http://docs.oracle.com/javase/7/docs/api/deprecated-list.htmlhttp://docs.oracle.com/javase/7/docs/api/java/util/HashMap.htmlhttp://docs.oracle.com/javase/7/docs/api/index.html?java/util/HashMap.htmlhttp://bugreport.sun.com/bugreport/http://docs.oracle.com/javase/7/docs/api/index-files/index-1.html

hashmap (java platform se 7 )

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