Java program to print fibonacci series upto a given number

import java.io.*; class Fibonacci { int next,curr,prev,num;             Fibonacci(int a)   { next=1;      curr=1;     prev=0;     num=a;  }   void calc()   { while(prev<=num)     { System.out.println(prev);       prev=curr;       curr=next;       next=prev+curr;  }   }   public static void main(String s[])throws IOException   { BufferedReader br=new BufferedReader(new InputStreamReader(System.in));     System.out.println("Enter the limit");     int a=Integer.parseInt(br.readLine());     Fibonacci f=new Fibonacci(a);     f.calc(); } } Output