Iterate through items in arraylist, with an index

Question

I want to iterate through items in an arraylist of objects, with an index as well, so that I can transfer a string (part of object/class) into an ArrayList<String>

My code:

for(PeopleDetails person : people_list; /*not using termination, will terminate at end of people_list */ ;i++){
  /// Code here         
}

However I get an error, saying :

Type mismatch: cannot convert from ArrayList<PeopleDetails> to PeopleDetails.

What causes this error ? Thanks for the help!!

It's telling you that `people_list` is an `ArrayList` and not `PeopleDetails`. — Maroun, Jan 01 '14 at 15:25
Try posting more relevant code, as in amount wise. Also, why don't you use a normal for loop instead of that _enhanced_ one? — takendarkk, Jan 01 '14 at 15:27

score 2 · Answer 1 · edited May 23 '17 at 10:25

2

This is not a for-each statement (I've removed your comment for clarity):-

for(PeopleDetails person : people_list;  ;i++)

This is:-

for(PeopleDetails person : people_list)

You're using it like a for statement. If you want to keep an index in a for-each you need to do it manually:-

 int index = 0;
 for(PeopleDetails person : people_list)
 {
   index++;
 }

Further discussion of other ways to iterate over a collection with an index can be found here.

edited May 23 '17 at 10:25

Community

1
1

answered Jan 01 '14 at 15:29

Ross Drew

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yeah I realized that afterwards. This question is therefore useless... How can I delete it??? – Swedish Architect Jan 01 '14 at 15:30
don't need to delete it – Ross Drew Jan 01 '14 at 15:31
The purpose of this site is that questions are there for other people to search, this may come up again. – Ross Drew Jan 01 '14 at 15:31
OK, I'll leave it up. – Swedish Architect Jan 01 '14 at 15:32

score 0 · Answer 2 · answered Jan 01 '14 at 15:30

0

If your List people_list is of String, Then Try

ArrayList<String>people_list = new ArrayList<String>(); 
for(String i :people_list){
    //Code
}

answered Jan 01 '14 at 15:30

Rakesh KR

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Iterate through items in arraylist, with an index

2 Answers2