成员变量和局部变量

package com.toobject;

public class Demo {

    public static void main(String[] args) {
        Car car1 = new Car();    //
        car1.color = "blue";
        car1.num = 5;
        car1.run();

    }

}

class Car {
    String color;    //成员变量
    int num;        //成员变量
    void run() {    //成员方法
        System.out.println(color + num + "go");
    }
}