Generate a random string in Java

import java.util.Random;
public class Demo {
	public static void main(String[] args) {
		String[] strArr = { "P", "Q", "R", "S","T", "U", "V", "W" };
		Random rand = new Random();
		int res = rand.nextInt(strArr.length);
		System.out.println("Displaying a random string = " + strArr[res]);
	}
}