My Music Box

/**Toss coin test that allow the you guess the upside as many times as you wish. When exit, the system would give you a list of information about your guesses.*/
import java.io.*;
public class TossCoin {
 public static void main(String[]args)
 {
  String input=null;
  long seed=System.currentTimeMillis();
  BufferedReader read=new BufferedReader(new InputStreamReader(System.in));
  GenericCoin coin=new GenericCoin();
  int tossCount=0;
  int frontCount=0;
  int backCount=0;
  int rightCount=0;
  try{
  coin.throwCoin(seed);
  System.out.print("Input your guess: ");
  input=read.readLine();
  while(!input.equals("exit"))
  {
   tossCount++;
   if(coin.getFront()==1)
   /**Assertion: Upside is front.*/
   {
    frontCount++;
    if(input.equals("front"))
    {
     rightCount++;
     System.out.println("The upside is front.You are right!");
    }
     
    else
     System.out.println("The upside is front.You are wrong!");
   }   
   else
   {
    backCount++;
    if(input.equals("back"))
    {
     rightCount++;
     System.out.println("The upside is back.You are right!");
    } 
    else
     System.out.println("The upside is back.You are wrong!");
   }
    
   seed=seed+500;
   coin.throwCoin(seed);
   System.out.print("Input your guess: ");
   input=read.readLine();
  }//end while
  }//end try
  catch(IOException e){
   e.printStackTrace();
  }
  System.out.println("Toss "+tossCount+" times   " +
    "front: "+frontCount+" times   back: "+backCount+" times");
  
  System.out.println("Right guess: "+rightCount);
  System.out.println("Right percentage: "+(double)rightCount/(double)tossCount*100+"%");
 }

}

result:

Input your guess: back
The upside is front.You are wrong!
Input your guess: front
The upside is back.You are wrong!
Input your guess: back
The upside is back.You are right!
Input your guess: back
The upside is back.You are right!
Input your guess: exit
Toss 4 times   front: 1 times   back: 3 times
Right guess: 2
Right percentage: 50.0%