
How do I get the current index/key in a "for each" loop
16 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.
In detail, how does the 'for each' loop work in Java?
} What would the equivalent for loop look like without using the for each syntax? People new to Java commonly encounter issues when trying to modify the original data using the new style …
java - Iterate through a HashMap - Stack Overflow
Jul 1, 2009 · Since all maps in Java implement the Map interface, the following techniques will work for any map implementation (HashMap, TreeMap, LinkedHashMap, Hashtable, etc.) …
How do I efficiently iterate over each entry in a Java Map?
If I have an object implementing the Map interface in Java and I wish to iterate over every pair contained within it, what is the most efficient way of going through the map? Will the ordering of
java - Is there a performance difference between a for loop and a …
It uses the enhanced for loop syntax introduced in version 1.5 of the Java programming language. So, you should use the enhanced for loop by default, but consider a hand-written counted loop …
loops - Ways to iterate over a list in Java - Stack Overflow
730 Being somewhat new to the Java language I'm trying to familiarize myself with all the ways (or at least the non-pathological ones) that one might iterate through a list (or perhaps other …
java - How to iterate over a JSONObject? - Stack Overflow
I use a JSON library called JSONObject (I don't mind switching if I need to). I know how to iterate over JSONArrays, but when I parse JSON data from Facebook I don't get an array, only a …
Is there a way to access an iteration-counter in Java's for-each …
253 No, but you can provide your own counter. The reason for this is that the for-each loop internally does not have a counter; it is based on the Iterable interface, i.e. it uses an Iterator to …
Foreach loop in java for a custom object list - Stack Overflow
Foreach loop in java for a custom object list Asked 12 years, 11 months ago Modified 3 years, 7 months ago Viewed 173k times
Calling remove in foreach loop in Java - Stack Overflow
Since the for-each loop hides the iterator, you cannot call the remove() directly. So in order to remove items from a for-each loop while iterating through it, have to maintain a separate list.