Java Arrays copyOf() Method

❮ Arrays Methods

import java.util.Arrays;

public class Main {
  public static void main(String[] args) {
    int[] myNum = {10, 20, 30, 40};
    int[] shortNum = Arrays.copyOf(myNum, 2);
    int[] longNum = Arrays.copyOf(myNum, 6);
    System.out.println(Arrays.toString(shortNum));
    System.out.println(Arrays.toString(longNum));
  }
}

Definition and Usage

The copyOf() method creates a new array with the given length, and copies the items of an array into it. The original array does not change.

If the new array is shorter, the last items are left out. If it is longer, the extra places get the default value of the type, for example 0 for int, false for boolean and null for String.

Tip: Arrays.toString() returns the items of an array as text, so you can print them.

Syntax

public static type[] copyOf(type[] original, int newLength)

type can be boolean, byte, char, short, int, long, float, double, or an object type such as String.

Parameter Values

Technical Details

Related Pages

Java Arrays Tutorial