How to remove an element of array in Java

Problem Description

How to remove an element of array?

Solution

Following example shows how to remove an element from array.

import java.util.ArrayList;

public class Main {
   public static void main(String[] args) {
      ArrayList objArray = new ArrayList();
      objArray.clear();
      objArray.add(0,"0th element");
      objArray.add(1,"1st element");
      objArray.add(2,"2nd element");
      System.out.println("Array before removing an element"+objArray);
      objArray.remove(1);
      objArray.remove("0th element");
      System.out.println("Array after removing an element"+objArray);
   }
}

Result

The above code sample will produce the following result.

Array before removing an  element[0th element, 1st element, 2nd element]
Array after removing an element[2nd element]

Another sample example of Arrays Remove

import java.util.ArrayList;

public class ArrayListDemo {
   public static void main(String[] args) {
      ArrayList<Integer> arr = new ArrayList<Integer>(5);
      arr.add(20);
      arr.add(15);
      arr.add(30);
      arr.add(45);
      
      System.out.println("Size of list: " + arr.size());
      for (Integer number : arr) {
         System.out.println("Number = " + number);
      } 
      arr.remove(2);
      System.out.println("Now, Size of list: " + arr.size());
      
      for (Integer number : arr) {
         System.out.println("Number = " + number);
      } 
   }
}   

The above code sample will produce the following result.

Size of list: 4
Number = 20
Number = 15
Number = 30
Number = 45
Now, Size of list: 3
Number = 20
Number = 15
Number = 45