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Iterable vs. Iterator
An iterable is a collection of objects that can be traversed. The objects are traversed using an iterator that uses particular methods to iterate over an object.
How an iterator is initialized
Java
Iterator<Integer> iterator =
Arrays.asList(1,2,3).iterator();
Python
iterator = iter(1,2,3)
How an iterator traverses
Java
An iterator uses the following methods to traverse objects in Java:
hasNext()next()forEachRemaining()(this can only be used in Java 8)
Python
An iterator uses the following methods to traverse objects in Python:
next(): returns the next item in the iterable.iter(): returns the iterator object itself.
Code
The codes below explain the relationship between the iterable and iterator:
import java.util.*;import java.util.*;import java.util.Arrays;import java.util.List;class example {public static void main( String args[] ) {System.out.println("Printing done using hasNext() and next()");Iterator<Integer> myObj =Arrays.asList(1, 2, 3).iterator();while (myObj.hasNext()){System.out.println(myObj.next());}}}
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