Question

我想获取一个包含字符串和整数的文本文件，并在每一行上单独获取某些整数，并将该特定整数分配给变量，以便稍后由其他类访问。这是我到目前为止，我几乎肯定它不会起作用：

 public void openInputFile()
    {

     String fileName = "concerts.txt";
     Scanner inputStream = null;


    try{
        inputStream = new Scanner(new File(fileName));
    }
    catch (FileNotFoundException e)
    {
        System.out.println("error");
        System.exit(0);

    }
    while (inputStream.hasNextLine()){
        int capacityM =0 ;
        int ticketPriceM = 0;
        int capacityO = 0;
        int ticketPriceO = 0;
        int capacityP = 0;
        int ticketPriceP = 0;


        if (inputStream.equals("Maroon 5")){
            capacityM = inputStream.nextInt(); //I want to read line #2 of the txt file assign it here
            ticketPriceM = inputStream.nextInt();//Line 3 of txt file needs to be assigned here
        }
            else if(inputStream.equals("One Direction")){
                capacityO = inputStream.nextInt(); //
                ticketPriceO = inputStream.nextInt();
            }
                else {
                    capacityP = inputStream.nextInt();
                    ticketPriceP = inputStream.nextInt();

                }
        System.out.println(capacityM + ticketPriceM + capacityO + 
                ticketPriceO + capacityP + ticketPriceP);
        }

    inputStream.close();

    }
}

这是正在读取的文本文件的样子。我不确定我是否应该使用数组。

Maroon 5
15     //number of tickets available
40     //ticket price
One Direction
10
50
Pearl Jam
20
30

Answer 1

您应该使用nextLine方法从文件中读取行。而不是使用equals方法来比较String

处的else-if

  String line=inputStream.nextLine();//Call nextLine only once
                                     //than use the line to compare 
                                     //different condition
   if (line.equals("Maroon 5")){
     ....
   }else if(line.equals("One Direction")){
   .....
   }

从文本文件中读取某些行并分配给单独的变量

1 个答案: