The Java Iterator interface represents an object capable of iterating through a collection of Java objects, one object at a time. The Iterator interface is one of the oldest mechanisms in Java for iterating collections of objects (although not the oldest — Enumerator predated Iterator).
Moreover, an iterator differs from the enumerations in two ways:
1. Iterator permits the caller to remove the given elements from the specified collection during the iteration of the elements.
2. Method names have been enhanced.
The list is given as : [Welcome, to, our, website] Welcome to our website After the remove() method is called : [Welcome, to, our]
Like Iterator and ListIterator, Spliterator is a Java Iterator, which is used to iterate elements one-by-one from a List implemented object.
The main functionalities of Spliterator are:
- Splitting the source data
- Processing the source data
The Interface Spliterator is included in JDK 8 for taking the advantages of parallelism in addition to sequential traversal. It is designed as a parallel analogue of an iterator.
Estimate size: 5 Exact size: 5 Boolean Result: true Elements of ArrayList : 101 201 301 401 501 Output from splitr2: 101 201 Output from splitr1: 301 401 501
Difference between Iterator and Spliterator in java : Iterator Spliterator
Introduced in Java 1.2 Introduced in Java 1.8 Iterator only iterates elements individually Spliterator traverse elements individually as well as in bulk It is an iterator for whole collection API It is an iterator for both Collection and Stream API, except Map implementation classes It uses external iteration It uses internal iteration. It is a Universal iterator It is Not a Universal iterator It does not support parallel programming It supports parallel programming by splitting the given element set so that each set can be processed individually.
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