typescript 类 -- 学习笔记三

class Point { public x: number public y: number constructor(x: number, y: number) { this.x = x this.y = y } public getPosition() { return `${this.x} ${this.y}` }}const point = new Point(1, 2)class Parent { public name: string constructor(name: string) { this.name = name }}class Child extends Parent { constructor(name: string) { super(name) }}// public 公共// private 私有的// protected 受保护class Parent1 { // private age: number protected age: number protected constructor(age: number) { this.age = age } protected getAge() { return this.age }}class Child1 extends Parent1 { constructor(age: number) { super(age) }}// readonlyclass UserInfo { public readonly name: string constructor(name: string) { this.name = name }}class A { constructor(public name: string) {}}class Parent3 { public static getAge() { return Parent3.age } private static age: number = 18 constructor() {}}class Info { public name: string public age?: number private _infoStr: string constructor(name: string, age?: number, public sex?: string) { this.name = name this.age = age } get infoStr() { return this._infoStr } set infoStr(value) { // console.log(`setter: ${value}`) this._infoStr = value }}// 抽象类，abstract 类不能创建的实例对象。abstract class People { constructor(public name: string) {} public abstract printName(): void}class Man extends People { constructor(name: string) { super(name) this.name = name } public printName() { console.log(this.name) }}const m = new Man('lison')m.printName()abstract class People1 { public abstract _name: string abstract get insideName(): string abstract set insideName(value: string)}class P extends People1 { public _name: string public insideName: string}class People3 { constructor(public name: string) {}}let p2: People3 = new People3('lison')class Animal { constructor(public name: string) {}}p2 = new Animal('haha')// 接口interface FoodInterface { type: string}class FoodClass implements FoodInterface { public type: string}class A1 { protected name: string}interface I extends A1 {}class B extends A1 implements I { public name: string}const create = <T>(c: new() => T): T => { return new c()}class Infos { public age: number constructor() { this.age = 18 }}