Essentially, there are only two ways to iterate over a list: by using an index or by using an iterator. The enhanced for loop is just a syntactic shortcut introduced in Java 5 to avoid the tedium of …

Jul 28, 2011 · Iterator is class that manages iteration over an Iterable. It maintains a state of where we are in the current iteration, and knows what the next element is and how to get it.

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.) …

May 1, 2011 · An iterator is just an implementation of the java.util.Iterator interface. If you're using an existing iterable object (say, a LinkedList) from java.util, you'll need to either subclass it and …

Nov 18, 2011 · I'm very confused about the iterator in Java. The tutorial is was reading said this: In the Java programming language, an interface is a reference type, similar to a class, that can …

Dec 11, 2009 · 419 Here is a code sample to use the iterator in a for loop to remove the entry.

The for-each loop, added in Java 5 (also called the "enhanced for loop"), is equivalent to using a java.util.Iterator --it's syntactic sugar for the same thing.

Jun 11, 2012 · Iterator iterator = Set.iterator(); Iterator iterator = List.iterator(); But we get ListIterator object only from the List interface, see here: where as a ListIterator allows you to …

Given Iterator<Element>, how can we conveniently convert that Iterator to a List<Element>, so that we can use List's operations on it such as get (index), add (element), etc.

There is no way to iterate over a set without an iterator, apart from accessing the underlying structure that holds the data through reflection, and replicating the code provided by …