java generate array of all letters in the alphabet

/**
 * @author lautturi.com
 * Java example:generate alphabet in java
 */
import java.util.*;

public class Lautturi {

	public static void main(String[] args) {

		char[] alphabet = new char[26];
		for(int i= (int)'a';i<= (int)'z';i++) {
			int idx = i-(int)'a';
			alphabet[idx] = (char)i;
		}

		System.out.println(Arrays.toString(alphabet));
	}
}

output:

[a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z]