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How To Iterate List Of Objects In Java

Last Updated : Mar 11, 2024

How To Iterate List Of Objects In Java

In this article we will show you the solution of how to iterate list of objects in java, in addition to the Collection interface, the List interface represents a collection containing a sequence of elements. When inserting elements in a list, users can specify quite precisely where to insert them.

It is possible to search for these elements in their index and they are accessible through their index. Java developers prefer ArrayList as the most common implementation of the List interface.

A list in Java makes it possible to maintain a collection of objects in an orderly fashion.

A List in Java is capable of storing duplicate elements and null elements.

A List interface is a component of the java.util package that inherits the Collection interface.

It preserves the order in which the components were inserted. We will now discuss the idea of how to iterate a list of objects in java with an example.

Step By Step Guide On How To Iterate List Of Objects In Java :-

package talkerscode.com;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
public class talkerscode {
   public static void main(String[] args) {
      List<Integer> list = new ArrayList<>(Arrays.asList(1,2,3,4,5,6,7,8,9,0));
      for(int i= 0; i< list.size(); i++) {
         System.out.print(list.get(i) + " ");
      }
      System.out.println();
      for (Integer integer : list) {
         System.out.print(integer + " ");
      }
      Iterator<Integer> iterator = list.iterator();
      System.out.println();
      while(iterator.hasNext()) {
         System.out.print(iterator.next() + " ");
      }
   }
}
  1. As part of the declaration, we name the package "talkerscode.com"
  2. In order to use the libraries, we import them.
  3. This is the main method we are going to define.
  4. In our new array list, we have the values 1, 2, 3, 4, 5, 6, 7, 8, 9, and 0 at the beginning.
  5. An iterative for loop is used to cycle through the list and print the values as they are displayed.
  6. Iterating through the list and printing each value is done using a foreach loop.
  7. A list is iterated through by creating an iterator object.
  8. With an iterator, we print each value after iterating through the list with a while loop.
  9. As a result of the program, three types of integer values will be displayed: foreach loops, for loops, and iterators.

Conclusion :-

As a result, we have successfully learned how to iterate a list of objects in java with an example. Providing an overview of Java List Iterators is the purpose of this article.

I hope this article on how to iterate list of objects in java helps you and the steps and method mentioned above are easy to follow and implement.