java - Error with console.readLine(); but everything looks correct in code? -

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when try run says there problem console.readline();.

import java.io.console;  public class pingpong { public static void main(string[] args) {     system.out.println("give me number, honey?");     string stringyournumber = console.readline();     integer yournumber = integer.parseint(stringyournumber);      system.out.println("here ya go:");     ( integer i=1; <=yournumber; i++){         if( % 5==0 && % 3==0){             system.out.println("pingpong");         } else {             if (i % 5==0){                 system.out.println("pong");             } else {                 if ( % 3==0){                     system.out.println("ping");                 }             }         }     } }

you have declare , intialize variable called console

console console = system.console(); if (console != null)  {     str = console.readline (); }

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