import java.util.Random;    // Warn compiler we want to use Random class

/**
 * Demonstrates how to create and use instances of the Random class.
 */
public class Randomness
{
    /**
     * Print a random number between (and including) 1 and
     * the specified value.
     * @param max  The largest possible number to be randomly generated
     */
    public void printRandomNumber(int max)
    {
        Random rng;
        rng = new Random();
        // nextInt(max) returns something 0..(max-1). Adding 1 turns
        // that into 1..max.
        System.out.println(rng.nextInt(max)+1);
    }
    
    /**
     * Print "heads" or "tails".
     */
    public void flipACoin()
    {      
        Random rng;
        rng = new Random();
        if (rng.nextBoolean()) {
            System.out.println("Heads");
        }
        else {
            System.out.println("Tails");
        }
    }
    
    /**
     * Picks a random letter out of a string and returns it
     * as a char.
     * @param s  The string from which to select a letter
     * @return  A char that is a letter from s
     */
    public char randomCharacter(String s)
    {
        Random rng = new Random();
        int index = rng.nextInt(s.length());
        return s.charAt(index); // For now
    }  
    
}