Usage of Iteration's .hasNext(); and .next(); methods in Java

Question

Can anyone help me understand the below code, which contains hasNext() and .next() method which I was not able to understand.

import java.util.*;  // imported whole java.util package.

class Main {

  public static void main(String[] args) {

    ArrayList<String> cars = new ArrayList<String>();  // created ArrayList which name is cars.

    cars.add("Volvo");

    cars.add("Mercedes"); 

    cars.add("BMW");

    Iterator<String> x = cars.iterator();

    while(x.hasNext()) {

      System.out.print(x.next() + " ");  // It prints Volvo Mercedes BMW

    }

  }

}

Any help would be appreciated.

Answer 1

Basically, the .hasNext() method helps us to check whether the array list contains that particular element or not, if it is there then, it will return true or else false. Whereas, .next() method helps you to return the next element from the iteration.

I hope this will help.

Want to become a Java Expert? Join Java Certification now!!

Want to know more about Java? Watch this video on Java Course | Java Tutorial for Beginners: