我相信我已正确编写了所有代码,但是我收到了此错误,有人可以帮助我理解以下内容：

Exception in thread "main" java.util.InputMismatchException
at java.base/java.util.Scanner.throwFor(Scanner.java:939)
at java.base/java.util.Scanner.next(Scanner.java:1594)
at java.base/java.util.Scanner.nextDouble(Scanner.java:2564)
at gangPackage.newClass.main(newClass.java:15)

这是我的代码：

package gangPackage;
import java.util.*;
public class newClass {
    public static void main (String[] args) {
        Scanner Scan = new Scanner(System.in);
        String name;
        int age;
        double gpa;

        System.out.println("Enter your name: ");
        name = Scan.nextLine();
        System.out.println("Enter students age: ");
        age = Scan.nextInt();
        System.out.println("Enter your GPA: ");
        gpa = Scan.nextDouble();


        System.out.printf(name + " is " + age + " years old. And has a GPA of " + gpa);
    }
}