You should call like :
public class Abc {
public static void main(String[] args) {
System.out.println(headsOrTails());
}
public static boolean headsOrTails() {
boolean coinState;
if (Math.random() < 0.5) {//heads 50% of the time
coinState = true; //heads
} else {
coinState = false; //tails
}
return coinState;
}
}
and it will print the output of the function as true or false.