HeadsOrTails.java

class Coin {

    public int value;
    private int random;
    private final int HEADS = 1; // let 1 be heads and 0 be tails

    public Coin () {}

    public Coin (int v) {
        value = v;
    }

    public void flip () {
        random = (int) (Math.random() * 2); // returns 0 or 1
    }

    public boolean isHeads() { return random==HEADS;}
}

class HeadsOrTails {
    public static void main (String[] args) {

        Coin twoPence = new Coin(2);
        twoPence.flip();

        System.out.println( "The "+twoPence.value+"p coin was flipped"
         +" and it came up "+( twoPence.isHeads() ? "heads" : "tails"));
    }
}