How to copy an array - A Java Code Example

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To copy the contents of one array into another array you can use the static method arraycopy() of the System class.
The method takes five parameters: source, source start position, destination, destination start position and finally the length of the data to be copied.
In this example we create an array of integers with ten values and then use the arraycopy() method to copy the contents to another array.

/**
*
* @author javadb.com
*/
public class Main {

    /**
     * Copies an array of int values to another array
     */
    public void copyArrayExample() {

        int[] intArray = new int[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 0};

        int[] arrayCopy = new int[intArray.length];

        System.arraycopy(intArray, 0, arrayCopy, 0, intArray.length);

        for (int i = 0; i < arrayCopy.length; i++)
            System.out.println(arrayCopy[i]);

    }


    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        new Main().copyArrayExample();
    }
}

The output of the code will be (as you might have guessed):

1
2
3
4
5
6
7
8
9
0

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