Java for loop syntax for T obj objects

Question

I came across some Java syntax that I haven t seen before  I was wondering if someone could tell me what s going on here   for  ObjectType objectName   collectionName getObjects

User · Answer

That s the for each loop syntax   It is looping through each object in the collection returned by objectListing getObjectSummaries

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public class ForEachLoopExample        public static void main String   args             System out println  For Each Loop Example               int   intArray     1 2 3 4 5               Here iteration starts from index 0 to last index         for int i   intArray              System out println i

User · Answer

yes    This is for each loop in java   Generally this loop is become useful when you are retrieving data or object from the database   Syntex    for Object obj   Collection obj           Code enter code here     Example    for User user   userList         System out println  USer NAme      user name         etc etc     This is for each loop   it will incremental by automatically  one by one from collection to USer object data has been filled  and working

User · Answer

for each S3ObjecrSummary in objectListing getObjectSummaries    it s looping through each item in the collection

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It s called a for-each or enhanced for statement  See the JLS  sect 14 14 2   It s syntactic sugar provided by the compiler for iterating over Iterables and arrays  The following are equivalent ways to iterate over a list   List lt Foo gt  foos        for  Foo foo   foos        foo bar          equivalent to  List lt Foo gt  foos        for  Iterator lt Foo gt  iter   foos iterator    iter hasNext           Foo foo   iter next        foo bar        and these are two equivalent ways to iterate over an array   int   nums        for  int num   nums        System out println num         equivalent to  int   nums        for  int i 0  i lt nums length  i          int num   nums i       System out println num       Further reading   How is Java  39 s for loop code generated by the compiler The For-Each Loop

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The variable objectSummary holds the current object of type S3ObjectSummary returned from the objectListing getObjectSummaries   and iterate over the collection   Here is an example of this enhanced for loop from Java Tutorials  class EnhancedForDemo    public static void main String   args         int   numbers    1 2 3 4 5 6 7 8 9 10         for  int item   numbers            System out println  Count is      item                  In this example  the variable item holds the current value from the numbers array   Output is as follows   Count is  1 Count is  2 Count is  3 Count is  4 Count is  5 Count is  6 Count is  7 Count is  8 Count is  9 Count is  10   Hope this helps

User · Answer

Yes  It is called the for-each loop   Objects in the collectionName will be assigned one after one from the beginning of that collection  to the created object reference   objectName    So in each iteration of the loop  the  objectName  will be assigned an object from the  collectionName  collection  The loop will terminate once when all the items objects  of the  collectionName  Collection have finished been assigning or simply the objects to get are over   for  ObjectType objectName   collectionName getObjects           loop body        You can use the  objectName  here as needed and different objects will be                               reepresented by it in each iteration

[java] Java for loop syntax: "for (T obj : objects)"

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