Java How do I get current index key in for each loop

Question

In Java  How do I get the current index for the element in Java   for  Element song  question       song currentIndex               lt  lt want the current index      In PHP you could do this   foreach   arr as  index   gt   value        echo  Key   index  Value   value

User · Answer

In Java  you can t  as foreach was meant to hide the iterator  You must do the normal For loop in order to get the current iteration

User · Answer

As others pointed out   not possible directly   I am guessing that you want some kind of index key for Song  Just create another field  a member variable  in Element  Increment it when you add Song to the collection

User · Answer

You can t  you either need to keep the index separately   int index   0  for Element song   question        System out println  Current index is       index          or use a normal for loop   for int i   0  i  lt  question length  i          System out println  Current index is      i       The reason is you can use the condensed for syntax to loop over any Iterable  and it s not guaranteed that the values actually have an  index

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Example from current code I m working with   int index -1  for  Policy rule   rules            index            do stuff here     Lets you cleanly start with an index of zero  and increment as you process

User · Answer

AVOID THIS                                                                                                                                                                for  Song s  songList       System out println s         songList indexOf s          it is possible in linked list   you have to make toString   in song class  if you don t it will print out reference of the song    probably irrelevant for you by now

User · Answer

Keep track of your index  That s how it is done in Java    int index   0      for  Element song  question              Do whatever          index

User · Answer

Not possible in Java     Here s the Scala way   val m   List 5  4  2  89   for  el  i   lt - m zipWithIndex    println el       i

[java] Java, How do I get current index/key in "for each" loop

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