Iterator is an important tool in Java collection framework, which provides a way to traverse collection elements. This article will introduce the basic usage of iterators in the Java collection framework and provide corresponding source code examples.
The Java collection framework provides multiple collection types such as List, Set, and Map. Iterators can be applied to each of these collection types, allowing us to iterate over the elements in a collection in a specific order without knowing the internal implementation details of the collection.
The first step in using an iterator is to obtain the collection's iterator object. Assuming we have a List collection, we can get the iterator object by calling the iterator() method of the list object, as shown below:
List<String> list = new ArrayList<>();
list.