A program that counts from 1 to 100, printing "Fizz" if the number is divisible by 3, prints "Buzz" if it's divisible by 5, and prints "FizzBuzz" if it's divisible of both 3 and 5.

FizzBuzz.java

public class FizzBuzz{
    public static void main(String[] args){
        
        for(int i = 1; i <= 100; i++){
         /*  
          * Could check to see if i is divisible by 5 and 3 first 
          * that way you won't have to check if it's divisible by 3
          * and not also divisible by 5 and vice versa.
          
            if(i % 3 == 0 && i % 5 != 0){
                System.out.println("Fizz");
            }
            else if(i % 5 == 0 && i % 3 != 0){
                System.out.println("Buzz");
            }
            else if(i % 5 == 0 && i % 3 == 0){
                System.out.println("FizzBuzz");
            }
            else{
                System.out.println(i);
            }
        */
            if(i % 15 == 0){     //if divisible of 15, it's divisible by 3 and 5
                System.out.println("FizzBuzz");
            }
            else if(i % 3 == 0){
                System.out.println("Fizz");
            }
            else if(i % 5 == 0){
                System.out.println("Buzz");
            }
            else{
                System.out.println(i);
            }
        }
    }
}

The Fizz Buzz test. :)