java array element add code example

Example 1: java add element to existing array

//original array
String[] rgb = new String[] {"red", "green"};
//new array with one more length
String[] rgb2 = new String[rgb.length + 1];
//copy the old in the new array
System.arraycopy(rgb, 0, rgb2, 0, rgb.length);
//add element to new array
rgb2[rgb.length] = "blue";
//optional: set old array to new array
rgb = rgb2;

Example 2: add each element in an array java

import java.util.Arrays;
import java.util.Scanner;
public class SumOfElementsOfAnArray {
   public static void main(String args[]){
      System.out.println("Enter the required size of the array :: ");
      Scanner s = new Scanner(System.in);
      int size = s.nextInt();
      int myArray[] = new int [size];
      int sum = 0;
      System.out.println("Enter the elements of the array one by one ");

      for(int i=0; i<size; i++){
         myArray[i] = s.nextInt();
         sum = sum + myArray[i];
      }
      System.out.println("Elements of the array are: "+Arrays.toString(myArray));
      System.out.println("Sum of the elements of the array ::"+sum);
   }
}