Java双重错误

Question

到此代码

public static void main(String[] args) {

    Scanner wg= new Scanner(System.in);
    System.out.print("Enter your weight on the Earth ");
    double weight = wg.nextDouble();

    double c;
    c=17*weight/100;
    System.out.println("Your weight on the Moon is: " + c);
    wg.close();
}

问题是什么，当我输入双值时，它向我显示:

Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)

Answer 1

您肯定使用了无效的 double 格式。例如使用“,”而不是“.”

Enter your weight on the Earth 55,77
Exception in thread "main" java.util.InputMismatchException