Random Capitals program in Java

gistfile1.java

public class randomCapitals {
    public static String randomUpper(String sentence) {
        StringBuilder output = new StringBuilder();

        for (int i = 0; i < sentence.length(); i++) {
            char c = sentence.charAt(i);

            if (Math.random() > .5) {
                c = Character.toUpperCase(c);
            } else {
                c = Character.toLowerCase(c);
            }

            output.append(c);
        }

        return output.toString();
    }

    public static void main(String[] args) {
        for (int i = 0; i < args.length; i++) {
            System.out.print(randomUpper(args[i]) + " ");
        }
        System.out.println();
    }
}