Java - 字符串无法转换为int

Question

这个问题已经有答案了:

How do I convert a String to an int in Java? (30 个回答)

已关闭 6 年前。

我有一个包含所有 12 个月温度的文本文件。但是当我尝试查找平均温度时，我收到错误“String无法转换为int”行

temp[counter] = sc.nextLine();

谁能告诉我这是怎么回事吗？

Scanner sc = new Scanner(new File("temperatur.txt"));
int[] temp = new int [12];
int counter = 0;
while (sc.hasNextLine()) {
   temp[counter] = sc.nextLine();
   counter++;
}

int sum = 0;
for(int i = 0; i < temp.length; i++) {
    sum += temp[i];
}

double snitt = (sum / temp.length);
System.out.println("The average temperature is " + snitt);

Answer 1

您需要将sc.nextLine转换为int

 Scanner sc = new Scanner(new File("temperatur.txt"));

      int[] temp = new int [12];
      int counter = 0;

      while (sc.hasNextLine()) {
          String line = sc.nextLine();
          temp[counter] = Integer.ParseInt(line);
          counter++;
        }

        int sum = 0;

        for(int i = 0; i < temp.length; i++) {
          sum += temp[i];

    }

    double snitt = (sum / temp.length);

       System.out.println("The average temperature is " + snitt);
  }
}