一个简单的问题，但我不知道为什么？

Question

     public class Car2
          {
           int speed;
           String color;
           public static void main(String[]args)
                {
                     Car carpassedby=new Car();
                      carpassedby.speed=60;
                      carpassedby.color="green";
                }
           }

The IDE tell me the lastest "speed " and "color " are error

Answer 1

use Car2 carpassedby=new Car2(); . Your variables are in Car2 but you are using Car .