“字符串不能转换为int”

Question

我有一个12个月的温度文本文件。 但是，当我试图找到的平均温度，我得到的错误“字符串不能被转换为int”到行

温度[计数器] = sc.nextLine（）;

有人谁看到有什么问题？

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

你需要转换sc.nextLine到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); 
    } 
} 

Answer 2

Scanner :: nextLine返回一个字符串。在Java中，您不能像隐式地将String转换为int。

尝试

temp[counter] = Integer.parseInt(sc.nextLine()); 

Answer 3

你sc.nextLine（）返回字符串

https://www.tutorialspoint.com/java/util/scanner_nextline.htm