Category: Java Interview Questions

There are many lists of interview questions. Often with wrong answers. I’ll try to explain why they are so wrong.

Note: In the category “Java Misnomers” are some more posts that could be helpful while preparing for job interviews.

Recursive FizzBuzz

FizzBuzz in two lines of code.

The only import you need is one for System.out:

import static java.lang.System.out;

Simple two-liner:

static void f(int a, int z) {
	out.println(a % 15 < 1 ? "FizzBuzz" : a % 3 < 1 ? "Fizz" : a % 5 < 1 ? "Buzz" : a);
	if (a < z) f(1 + a, z);
}

Without using the literal “FizzBuzz”:

static void g(int a, int z) {
  int x = 0;
  if (a % 3 < 1) { out.print("Fizz"); ++x; }
  if (a % 5 < 1) { out.print("Buzz"); ++x; }
  if (x < 1) out.print(a);
  out.println();
  if (a < z) g(1 + a, z);
}

Note that I use x<1 instead of x==0 to save a single character.