java - Why dosen't my code continue when y is enter? -


i'm new programming (java) , stack overflow. code works except when run , press y keeps repeating "do want continue" , stuck in loop (everything else works). please tell me why happening , should fix it.

import java.util.scanner; import java.text.numberformat; import java.text.numberformat; import java.util.scanner;  public class ch03_ex3_downloadtime {      public static void main(string[] args) {         int dspeed = 0;         int fsize = 0;         scanner sc = new scanner(system.in);          { // input user             system.out.println("welcome download time estimator");             system.out.print("enter file size (mb): ");             fsize = sc.nextint();             system.out.print("enter download speed (mb/sec): ");             dspeed = sc.nextint();         }         int dtime = fsize / dspeed;         int hours;         int remainder;         remainder = dtime % 3600;         hours = dtime / 3600;         int minutes;         int seconds = remainder % 60;         minutes = remainder / 60;         string message = "\n" +             "this download take approximately " + hours + " hours " + minutes + " minutes " + seconds + " seconds \n";         system.out.println(message);          boolean iscontinuing = true;         boolean inputisinvalid = true;         while (inputisinvalid) {             system.out.print("continue? (y/n): ");              string choice = sc.next();              if ("y".equalsignorecase(choice)) {                 inputisinvalid = false;             } else if ("n".equalsignorecase(choice)) {                 inputisinvalid = false;                 iscontinuing = false;             } else {                 system.err.print("error: valid answers y/n. ");             }         }     } } 

import java.util.scanner; import java.text.numberformat; import java.text.numberformat; import java.util.scanner;  public class ch03_ex3_downloadtime {  public static void main(string[] args) { test t=new test(); t.chk();  }   }    class test{     public void chk(){     int dspeed = 0;         int fsize = 0;         scanner sc = new scanner(system.in);            {         // input user             system.out.println ("welcome download time estimator");             system.out.print("enter file size (mb): ");             fsize = sc.nextint();             system.out.print("enter download speed (mb/sec): ");             dspeed = sc.nextint();      }         int dtime = fsize / dspeed;         int hours;         int remainder;         remainder= dtime % 3600;         hours = dtime / 3600;         int minutes;         int seconds= remainder % 60;         minutes = remainder / 60;         string message = "\n" +                          "this download take approximately " + hours +  " hours "                        + minutes  + " minutes "                        + seconds + " seconds \n";         system.out.println(message);      system.out.println("do want retry");     system.out.println("press 1 if yes");     system.out.println("press 2 if no");      int a=sc.nextint();      if(a==1)     {     chk();     }      else     {     system.out.println("thanks");     }       }     }

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