Copy Array from Specified Source Array in Java

Use arraycopy() method in Java to copy an array from the specified source array.

Here, we have two arrays −

int arr1[] = { 10, 20, 30, 40};
int arr2[] = { 3, 7, 20, 30};

Now, we will use the arraycopy() method to copy the first two elements of the 1st array to the 2nd array −

System.arraycopy(arr1, 0, arr2, 2, 2);

The following is an example −

Example

 Live Demo

import java.lang.*;
public class Demo {
   public static void main(String[] args) {
      int arr1[] = { 10, 20, 30, 40};
      int arr2[] = { 3, 7, 20, 30};
      System.arraycopy(arr1, 0, arr2, 2, 2);
      System.out.print("New Array = ");
      System.out.print(arr2[0] + " ");
      System.out.print(arr2[1] + " ");
      System.out.print(arr2[2] + " ");
      System.out.print(arr2[3] + " ");
   }
}

Output

New Array = 3 7 10 20