如何使用不带InputMismatchException的扫描仪从文件读取双精度

Question

我正在做一个简单的任务。我正在为变量分配字符串，整数和双精度型。通过扫描仪读取文本文件来分配变量。扫描仪无法读取双精度。它将引发输入不匹配异常。我已经研究了堆栈溢出的答案，并尝试了以下解决方案：

• Scanner double value - InputMismatchException
• Scanner InputMismatchException from file
• How to read double in java from a file
• Reading from file double value using Scanner - InputMismatchException?

文本文件的内容如下：

  

鹅卵石lin石\ n

     

1 2.2 \ n

     

这是一行文字\ n

这是我的代码：

public static void main(String[] args) throws FileNotFoundException {
       File file = new File("input.txt");
       Scanner scanner = new Scanner(file);
       String s1 = scanner.next(); // s1 is assigned to Pebbles
       String s2 = scanner.next(); // s2 is assigned to Flintstone
       int x = scanner.nextInt(); // x is assigned to 1
       double y = scanner.nextDouble(); // y is assigned to 2.2
       scanner.nextLine(); // Advance scanner to beginning of next line
       String s3 = scanner.nextLine();
       scanner.close(); // s3 is assigned to "This is a line of text"
       System.out.print(y);
   }

我如何使扫描仪读取2.2的双份？更改语言环境无效。将小数点更改为逗号也不起作用。