Random Number; 1 or 2?

How do I get the ints 1 OR 2 with either the random class or the Math class? This is what I have and I am only getting the value of 2.

public static void flip(Random r){
    int heads = 0; 
    int totalFlips = 0;
    Random number = new Random();
    int randomNumber;
    randomNumber = number.nextInt(2) + 1;
    do{
    if(randomNumber == 1){
        System.out.println("heads");
        heads++;
        totalFlips++;
    }
    else{
        System.out.println("tails");
        totalFlips++;
    }
    }while(heads < 3);

    if(heads == 3){
        System.out.print("3 heads in a row after " +totalFlips + "flips");
    }
}