Randomize capital letters

Question

Is there a simple way to, given a word String, randomise capital letters?

Example:

For word super I would get SuPEr or SUpER.

I am looking for a Java solution for this.

Answer 1

Here is one suggestion:

public static String randomizeCase(String str) {

    Random rnd = new Random();
    StringBuilder sb = new StringBuilder(str.length());

    for (char c : str.toCharArray())
        sb.append(rnd.nextBoolean()
                      ? Character.toLowerCase(c)
                      : Character.toUpperCase(c));

    return sb.toString();
}

Example

input: hello world
output: heLlO woRlD

(ideone.com demo)