Java change element in array

/**
 * @author lautturi.com
 * Java example: how to replace an element in array in java
 */

import java.util.*;

public class Lautturi {

	public static void main(String[] args) {
		int[] arr = {1, 3, 5, 2, 4};
		System.out.println(arr[0]);

		// Change elements in Java array
		arr[0] = 12;
		System.out.println(arr[0]);

		// Length of array
		System.out.println(arr.length);

		// Loop through array
		for (int i = 0; i < arr.length; i++) {
		  System.out.println(arr[i]);
		}

	}

}