1. Iterator is a design pattern and is a light-weight container.
2. Iterator doesnt need to know what the collection is (i.e. a List or sth else )
3. Using iterator ,we can remove the current element. The for-each loop hides the iterator, so you cannot call remove. Therefore, the for-each loop is not usable for filtering.
4. Similarly, forEach is not usable for loops where you need to replace elements in a list or array as you traverse it, but Iterator can be used.
5 .Finally, forEach is not usable for loops that must iterate over multiple collections in parallel.
2. Iterator doesnt need to know what the collection is (i.e. a List or sth else )
3. Using iterator ,we can remove the current element. The for-each loop hides the iterator, so you cannot call remove. Therefore, the for-each loop is not usable for filtering.
4. Similarly, forEach is not usable for loops where you need to replace elements in a list or array as you traverse it, but Iterator can be used.
5 .Finally, forEach is not usable for loops that must iterate over multiple collections in parallel.
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