Uni Game project, need help

Question

hi, i have an assignment for uni where i have to make a text game according to a given scenario, a part of the game has a bomb room and a bomb timer, where if the player doesent get the code right within 10 seconds the bomb explodes and the player has the choice to restart.
here is the code to the bomb, im not sure if the sleep method timer is causing the problems, it runs, but when you choose y to restart it just goes into this error:
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Scanner.java:840)
at java.util.Scanner.next(Scanner.java:1461)
at java.util.Scanner.nextInt(Scanner.java:2091)
at java.util.Scanner.nextInt(Scanner.java:2050)
at hostage.Main.main(Main.java:134)
here is the code:
     boolean go = true;
     boolean countfinish = false;
     Scanner sc = new Scanner(System.in);
     int rn1, rn2, answer, sumofrn1rn2;
     boolean restart = true;
     System.out.println("you have entered the BOMB ROOM!!! solve the equasion within 10 seconds to defuse the bomb");
     System.out.println();
//below is the equasion to defuse the bomb     
rn1 = (int)(Math.random()*1000);
rn2 = (int)(Math.random()*1000);
     System.out.print(rn1);
     System.out.print(" + ");
     System.out.print(rn2);
     System.out.print(" = ");
     answer = 0;
     sumofrn1rn2 = (rn1+rn2);
     try
// the sleep method of the thread object is called
Thread.sleep(10000);
catch(InterruptedException e)
countfinish = true;
if (countfinish == true)
     if (sumofrn1rn2 != answer)
System.out.println("You faild, oh and your dead... Restart? (y/n)");
restart2 = sc.next().charAt(0);
if (restart2 == 'y')     
     Current_Room = "ROOM 1";
     System.out.println("Welcome to the Lobby!.....again....");
     answer = sc.nextInt();
     if (answer == rn1+rn2)
          System.out.println("You have defused the bomb... fewww...");
          //go back to lobby
any help would be appresiated, thank you

Answer 1

No problem. One thing that I noticed after testing it out for a bit more...
With those implementations, you only get 1 guess, which I suppose is accurate to real life. If you want them to be able to have multiple guesses then, here's some new implementation
import java.util.Timer;
import java.util.TimerTask;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Random;
public class BombGameTest
     private BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
     private boolean failed = false;
     public static void main(String[] args)
          new BombGameTest().bombTest();
     public void bombTest()
          class ExplodeBomb extends TimerTask
               int timeLeft = 10;
               public void run()
                    if (timeLeft != 0)
                         System.out.println(timeLeft-- + "...");
                    else
                         System.out.println();
                         failed = true;
                         System.out.println("You failed to difuse the bomb, you are now dead. Restart? [y/n] ");
                         String tmp = "";
                         try
                              tmp = br.readLine();     //Like the Scanner.nextLine();
                         } catch(Exception ex) {}
                         if (tmp.toUpperCase().equals("Y"))
                              //run some restart method
                         else
                              System.exit(0);
          System.out.println("You have entered the BOMB ROOM!!! Solve the equation within 10 seconds to defuse the bomb.");
          System.out.println();
          Random randGen = new Random();
          int r1 = randGen.nextInt(1000);     //basically the same as the random() method
          int r2 = randGen.nextInt(1000);
          System.out.print(r1);
          System.out.print(" + ");
          System.out.print(r2);
          System.out.println(" = ? ");
          Timer t = new Timer();
          t.scheduleAtFixedRate(new ExplodeBomb(), 0,1000);
          int answer = 0;
          boolean incorrect = true;
          while (incorrect)
               try
                    answer = Integer.parseInt(br.readLine());
               } catch (Exception ex) {}
               if (answer == r1 + r2 && !failed)
                    t.cancel();
                    System.out.println("Congrats! You defused the bomb.");
                    incorrect = false;
}