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What is difference between Iterator and for loop
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Answer Posted / deepesh
An "Iterator object" is used to move through a Collection,
by calling Collection's iterator() method. By using for
loop, you are limited to that particular collection you are
traversing, while iterator gives freedom to work with any
collection.
iterator's job is to move through the sequence (without the
client programmer knowing or caring about the underlying
structure & its modification) using hasNext() and next().
remove() is provided "to remove the last element returned by
the iterator" and is called only per call after next().
Iterator can be used for Lists and Sets for forward
(unidirectional) traversal of elements without knowing their
size, which is nearly same concept for for-each loop.
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