StackOverflow2013

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plurals

PO
primarykey
Id
6828386
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2011-07-26T10:05:32.270
FavoriteCount
0
LastActivityDate
2011-07-26T10:11:43.070
LastEditDate
2017-05-23T11:53:29.407
LastEditorUserId
-1
OwnerUserId
546060
ParentId
6828362
PostTypeId
2
Score
25
ViewCount
0
LastEditorDisplayName
text
Body
I think <code>isEmpty()</code> is a bit more efficient. However a smart compiler may optimize the <code>equals("")</code> call anyway. From the <a href="http://hg.openjdk.java.net/jdk7/build-gate/jdk/file/tip/src/share/classes/java/lang/String.java" rel="nofollow noreferrer">OpenJDK source</a>: <pre><code> 671 public boolean isEmpty() { 672 return count == 0; 673 } 1013 public boolean equals(Object anObject) { 1014 if (this == anObject) { 1015 return true; 1016 } 1017 if (anObject instanceof String) { 1018 String anotherString = (String)anObject; 1019 int n = count; 1020 if (n == anotherString.count) { 1021 char v1[] = value; 1022 char v2[] = anotherString.value; 1023 int i = offset; 1024 int j = anotherString.offset; 1025 while (n-- != 0) { 1026 if (v1[i++] != v2[j++]) 1027 return false; 1028 } 1029 return true; 1030 } 1031 } 1032 return false; 1033 } </code></pre> Also the <a href="https://stackoverflow.com/questions/3321526/should-i-use-string-isempty-or-equalsstring/3321548#3321548">answer here</a> on whether to use <code>str.isEmpty()</code> or <code>"".equals(str)</code> is spot on: <blockquote> The main benefit of <code>"".equals(s)</code> is you don't need the null check (<code>equals</code> will check its argument and return <code>false</code> if it's null), which you seem to not care about. If you're not worried about <code>s</code> being null (or are otherwise checking for it), I would definitely use <code>s.isEmpty()</code>; it shows exactly what you're checking, you care whether or not <code>s</code> is empty, not whether it equals the empty string </blockquote>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. PODifference between String.isEmpty() and String.equals("")
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USCommunity
UserOwnerUserId
1. USCharles Goodwin
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. PODifference between String.isEmpty() and String.equals("")
 singulars
 PostTypePostTypeId
 PTQuestion
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
2. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
3. VO
 singulars
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 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. This table or related slice is empty.

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