在Java中使用计时器的问题.计时器不会更新

Question

嘿伙计们,感谢先前的帮助在我尝试解释我的问题之前,你们需要知道代码是什么.它几乎是"编写一个用户猜测1到1000之间的随机数的游戏.程序应该从键盘读取一个数字,并打印猜测是否太高,太低或正确.当用户已经猜对了,该程序打印出所做的猜测数量和时间以及玩家名称.当游戏开始时,程序必须打印整个高分列表,按升序中的猜测数量排序"

问题是在玩游戏时,当你设法得到正确的答案时,它没有显示时间,但是当打印高分时,它显示在那里,因为试图更改布尔语句而没看到上班.以下是问题的说明:

You guessed 2 times in 0 seconds.
Please enter your name.
gert
Want to go again?(y/n).....n
HighScore:
Tries        Time       Name
1             35        b
2             6         gert

所以基本上我很困难,我希望你们能给我一些指示或某种帮助,以便我能解决问题,,,,,任何帮助都表示赞赏....顺便说一下这是我的第一个程序,基本上还处于学习阶段所以请轻松评论.代码如下:

import java.util.*;
import java.util.Scanner.*;
import java.util.ArrayList.*;
import java.util.Collections.*;


public class Main {
private static void start() {


 int tries = 0 ;

 int guess = -1;
 String name ;
 String quit = "quit";
 String y = "yes";
 String n = "no";
 String currentGuess;


 String another = ("y") ;
 Scanner input = new Scanner (System.in);

ArrayList<Integer> score = new ArrayList<Integer>();
ArrayList<Long> tg = new ArrayList<Long>();
ArrayList<String> playern = new ArrayList<String>();



boolean a=false;

  do {
      a=false;
     int answer = (int) (Math.random() * 1000 + 1) ;
    System.out.println( " Welcome to Guessing Game " )  ;
    System.out.print("Please enter a number between 1 and 1000 : ");
                    currentGuess = input.nextLine();
            long startTime = System.currentTimeMillis();


      do
      {


               if (currentGuess.equalsIgnoreCase(quit))
        {
            System.out.println("Leaving Us So Soon?");
            System.exit(0);
        }

               try    {
            guess = Integer.parseInt(currentGuess);
              } catch (NumberFormatException nfe) 
                        {
            System.out.println(" Dude Can You Read, Only Digits ");
                        currentGuess = input.nextLine();
                        continue;



            }

        if (guess < 1 || guess > 1000)
        {
            System.out.println("Stupid Guess I Wont Count That.");
                        currentGuess = input.nextLine();
                        continue;
        }

       if (guess < answer )
          {
            System.out.println("too low "+answer);
            currentGuess = input.nextLine();
                        tries++;
        }


    else if(guess  > answer )
        {
            System.out.println("too high "+answer);
            currentGuess = input.nextLine();
                        tries++;
        }


    else if (guess == answer)
        {       
            //stop stop watch
            long endTime = System.currentTimeMillis();
            //calculate game time
            long gameTime = endTime - startTime;
                        gameTime = (gameTime/1000);
            System.out.println("You Rock Dude, Good Job!");


                        System.out.println("You guessed " + tries + " times in " + (int)(gameTime/1000) + " seconds.");
                        System.out.println("Please enter your name.");
                          name = input.nextLine();

                          score.add(tries) ;
                          playern.add(name);
                          tg.add(gameTime);

                          for ( int g=0; g < score.size()-1; g++){
                              for ( int b=g+1; b < score.size(); b++){
                                  if (score.size()>1){
                                  if  (score.get (g) > score.get (b)){
                                    Collections.swap(score, g, b);
                                    Collections.swap(playern, g, b);
                                    Collections.swap(tg, g, b);

                                  }
                                  }
                                  if (score.get (g)==score.get(b) && tg.get (g) > tg.get(b))
                                  {
                                    Collections.swap(score, g, b);
                                    Collections.swap(playern, g, b);
                                    Collections.swap(tg, g, b);
                                  }
                              }

                          }



             boolean s = false  ; 
             while (s==false)
              {


                     System.out.print("Want to go again?(y/n).....");
                     currentGuess = input.nextLine();
                      if (currentGuess.matches("y"))
            {

                        System.out.println("HighScore:");
                        System.out.println("Tries\tTimentName");
                     for (int j=0; j<score.size(); j++){
                    System.out.println(score.get(j) +"\t"+tg.get(j)+ "\t"+playern.get(j));
                            }


                }

                     s=true;

            }

                     //if user doesn't want to play again

                             if (currentGuess.matches("n"))
                             { System.out.println("HighScore:");
                               System.out.println("Tries\tTime\t\tName");
                for (int j=0; j<score.size(); j++){
                System.out.println(score.get(j) +"\t"+tg.get(j)+ "\t"+playern.get(j));
                            }


                                System.out.println("Thanx For Playing.");
                a=true;

                                s=true;
                                 System.exit(0);  
                    } 
       }



        } while (guess != answer);

  }while(a==false);

}

public static void main(String[] args) {
    Main.start();
    }
}

Answer 1

首先,你把时间分开

long gameTime = endTime - startTime;
gameTime = (gameTime/1000);

再来这里

System.out.println("You guessed " + tries + " times in " + (int)(gameTime/1000) + " seconds.");

难怪你为什么得到0 :).所以,不要再分,只是把gameTime

然后当你添加到tg数组列表时添加tg.add(gameTime);哪个是正确的时间,这就是为什么当你列出Highscores时它的工作原理.