Copying part of Array in Java Example

Java Array Examples

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• Java Array Simple Program
• Java Array - Create, Declare, Initialize and Print Examples
• How to Initialize an Array in Java in One Line
• What's the Simplest Way to Print a Java Array?
• Create and Initialize Two Dimensional Array in Java
• How to Check if Two Arrays are Equal in Java
• Java ArrayBlockingQueue Example
• Java Convert Array to Set
• Copying part of Array in Java Example
• Sorting an Array using Arrays.sort() Method
• Check Two Arrays are Deeply Equal
• Java Arrays.copyOf() Example - Copying an Array
• Java Arrays.binarySearch() Example - Searching an Array
• Java Arrays.asList() Example - Convert Array to ArrayList
• Java Convert Array to Stack Example
• Java Pyramid Examples

This Java example shows how to copy part of an Array in Java Arrays.copyOf() method.

Copying part of Array in Java Example

import java.util.Arrays;

public class ArrayDemo {
   public static void main(String[] args) {

      // intializing an array arr1
      long[] arr1 = new long[] {15, 10, 45};

      // printing the array
      System.out.println("Printing 1st array:");
      for (int i = 0; i < arr1.length; i++){
         System.out.print(arr1[i]+" ");  
      }
      
      System.out.println("");  

      // copying array arr1 to arr2 with newlength as 5
      long[] arr2 = Arrays.copyOf(arr1, 16);

      // printing the array arr2
      System.out.println("Printing new array:");
      for (int i = 0; i < arr2.length; i++) {
         System.out.print(arr2[i]+" ");
      }
   }
}

Output

Printing 1st array:
15 10 45 
Printing new array:
15 10 45 0 0 0 0 0 0 0 0 0 0 0 0 0