StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
20201728
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-11-25T19:38:32.923
FavoriteCount
0
LastActivityDate
2013-11-25T19:57:29.040
LastEditDate
2013-11-25T19:57:29.040
LastEditorUserId
3030934
OwnerUserId
3030934
ParentId
20200783
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
<pre><code>static { int a=5; double x=4.1; } </code></pre> The purpose of the above block is make the code inside it execute before the <code>main()</code> method does. Whenever one open's a block in java and declare something inside it, here a static block with variables a and x, become local to that particular block, i.e. a and x can't be accessed outside the static block. For more info on scope and lifetime of variables in java refer to following links: <a href="http://www.cs.umd.edu/~clin/MoreJava/Objects/local.html" rel="nofollow">http://www.cs.umd.edu/~clin/MoreJava/Objects/local.html</a> <a href="http://www.c4learn.com/java/java-variable-scope/" rel="nofollow">http://www.c4learn.com/java/java-variable-scope/</a> So, the static block in this code is there to just confuse you, it does not have any impact on the execution or result of the program in your case. After the execution of static block, we've moved out of it thus destroying it's local resources, i.e. a and x. Now, according to Java, there doesn't exist any variable named <code>a</code>, a new variable with the same name can be initialized. @ismail - In Java, all code is executed from top-to-bottom order like any other language. Assuming you that all static blocks are executed before <code>main()</code> method is called. So consider a case where you have two static blocks: <pre><code>public class MyClass { static { System.out.println("Static Block 1"); } static { System.out.println("Static Block 2"); } } </code></pre> The output of above code would be <code>Static Block 1</code> <code>Static Block 2</code> Something similar is done by you in the your 1st code. 1. You declared some static instance variables. 2. You created a static block with some local variable and called a function from that block which could manipulate instance variables. 3. Due to the flow of Java, firstly instance variables were created and then they were manipulated by your static block. That's how you received modified output. But in 2nd code, the static instance variables got initialized after the execution of static block, hence you received initial values in the output.
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POJava static field usage
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USArpit
UserOwnerUserId
1. USArpit
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
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
CommentsPostId
1. This table or related slice is empty.

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.