//定义类

 class Person{

   // 类的静态方法,相当于Person.test = function(){console.log("类的静态方法");}

   static test() {

     console.log("类的静态方法");

   }

   //constructor构造函数

   constructor(name,age){

     console.log("调用构造函数");

     this.name = name;

     this.age = age;

   }

   //类的一般方法,定义在实例对象的原型对象上,相当于Person.prototype.show = function(){console.log("this.name,this.age");}

   show(){

     console.log(this.name,this.age);

   }

 }

 let person1 = new Person("wzh",25);

 console.log(person1);

 person1.show();

 Person.test();

 //定义类

 class Person{

   // 类的静态方法,相当于Person.test = function(){console.log("类的静态方法");}

   static test() {

     console.log("类的静态方法");

   }

   //constructor构造函数

   constructor(name,age){

     console.log("调用构造函数");

     this.name = name;

     this.age = age;

   }

   //类的一般方法,定义在实例对象的原型对象上,相当于Person.prototype.show = function(){console.log("this.name,this.age");}

   show(){

     console.log(this.name,this.age);

   }

 }

 let person1 = new Person("wzh",25);

 console.log(person1);

 class Child extends Person{

   constructor(name,age,sex){

     super(name,age);  //调用父类构造函数构造子类

     this.sex = sex;

   }

   //重写父类同名函数

   show(){

     console.log(this.name,this.age,this.sex);

   }

 }

 let child = new Child("wzl",24,"男");

 child.show();