Fibonacci series program in java

Program to print the Fibonacci series.

/**
 * This program is used to print fibonacci series.
 * @author W3schools360
 */

public class FibonacciSeries {
      /**
       * This method is used to print fibonacci series.
       * @param num
       */
      static void fibonacci(int num){
            int f1, f2=0, f3=1;
            for(int i=1;i <=num;i++){ 
               System.out.println(f3); f1 = f2; f2 = f3; f3 = f1 + f2; 
            } 
      } 
      public static void main(String args[]){ 
            int num = 6; 
            //method call 
            if(num > 0){
                  fibonacci(num);
            }else{
                  System.out.println("No. should be greater than zero.");
            }
      }

}

Output