Java学习(九)

·类和对象的扩展

class Human {
    String name;
    int age;
    Human(){}
    Human(String name,int age){
        this.name = name;
        this.age = age;
    }
    viod walk(){
        System.out.println(name + "慢慢走");
    }
}

class Child extends Human{
    String schoolName;
    Child(String name,int age,String school){
        super(name,age);
        this.schoolName = school;
        }
        void study(){
            System.out.println(name + "写数学作业");
        }
        void walk(){
            System.out.println(name + "蹦蹦跳跳地走");
        }
    }
}

public class Demo3{
    public static void main(String[] args){
        Human h = new Human("小明爸爸"，35);
        h.walk();
        Child c = new Child("小明",8,"实验小学");
        c.study();
        c.walk();
    }
}·用记事本更改编码方式后，仍然出现问题