StackOverflow2013

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plurals

PO
primarykey
Id
2046392
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2010-01-12T02:51:39.840
FavoriteCount
0
LastActivityDate
2010-01-13T23:01:55.343
LastEditDate
2010-01-13T23:01:55.343
LastEditorUserId
148765
OwnerUserId
148765
ParentId
2046375
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
From the Java <a href="http://java.sun.com/javase/6/docs/api/java/lang/Object.html" rel="nofollow noreferrer">documentation</a>: <blockquote> The general contract of hashCode is: <ul> <li>Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.</li> <li>If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.</li> <li>It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hashtables. </li> </ul> As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.) </blockquote> So yes, you can typically expect the default <code>hashCode</code> for an Object to be unique. However, if the method has been overridden by the class you are storing in the <code>Hashtable</code>, all bets are off.
Tags
Title
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PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POhash of java hashtable
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USChinmay Kanchi
UserOwnerUserId
1. USChinmay Kanchi
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PostLinksPostIdRelatedPostId
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PostLinksRelatedPostIdPostId
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PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
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VotesPostIdCreationDate
1. VO
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 PO
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 VoteTypeVoteTypeId
 VTUndeletion
2. VO
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 VTUpMod
CommentsPostId
1. This table or related slice is empty.

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