hasNext( ) method of Iterator Interface in java.

This method returns true if a collection contains more elements otherwise, false.

hasNext( ) method of Iterator Interface in java.

In the following example we will show you how can hasNext( ) method be implemented in Iterator interface.

Syntax

boolean hasNext( )

This method returns 'true' if a collection keeps more elements otherwise, false.

In this method, you can check for further elements in a collection, one element at a time. This method is used with the Iterator object. It is useful for checking the availability of more elements sequentially in a collection.

Parameter description

This method does not take any argument.

Example of hasNext( ) method

In this example we will show you how does hasNext( ) method work in a collection. This example will help you to understand how can you check for further elements in collection. Through this example we will show you how iterator( ) method is used and how the hasNext( ) method is used for checking more elements with the Iterator object in a collection.

Example:- 

package Devmanuals.com;
import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;
public class IteratorHasNext {
public static void main(String[] args) {
ArrayList alist = new
ArrayList();
alist.add("21");
alist.add("22");
alist.add("23");
alist.add("24");
alist.add("25");
System.out.println("Elements of list = "+alist);
System.out.println("Size of list = "+alist.size());
Iterator itr = alist.itertor();
boolean b =itr.hasNext();
System.out.println("List has elements : "+b);
}
}

Output : 

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