I'm trying to write a condition for ArrayList .hasNext.. Why can't I write as the following?

Question

The list declaration:

private List<SharedData> pairList = new ArrayList<>();

and somewhere in the code I'm trying to run a for loop on this List:

for(pairList.iterator().hasNext()) {
        do something;
    }

but, I receive an error:

 Multiple markers at this line

    - Syntax error on tokens, EnhancedForStatementHeaderInit expected 
     instead
    - Syntax error, insert "; ; ) Statement" to complete ForStatement"

That's not so clear for me. Why do I need to add ";;"? I'm also not sure it will run correctly.

Answer 1

You are looking for the while loop - not for.

Answer 2

You should use while loop not for loop because hasNext()returns a boolean.