what is wrong with my code??

package com.codegym.task.task04.task0412;

/*
Positive and negative numbers

*/

import java.io.*;
import java.util.Scanner;

public class Solution {
    public static void main(String[] args) throws Exception {
        //write your code here
        Scanner myObj = new Scanner(System.in);
        double number = myObj.nextDouble();
        ...
}