class User { public name: string; private constructor (name: string) { this.name = name; } } const user: User = new User('Khalil Stemmler'); // Error Why on Earth would you want to do that? We can't create instances anymore. How are we supposed to get Users out of this class...
但是请不要忘记,TypeScript 是处于 JavaScript 之上的一层,并且 TypeScript 编译器应该剥离所有花里胡哨的 TypeScript 注释,包括private。 这意味着下面的类做不到你想要的工作: class Person { private age: number; private name: string; private surname: string; constructor(name: string, surname: string, a...
interfaceIPoint{// getter settersetY:number;getY:number;drawoPoint:() =>void;getDistances:(p:IPoint) =>number; }classPointimplementsIPoint{// private 修饰的变量、方法 要在接口中去掉(隐藏)constructor(private_x:number,private_y:number){this._x= _x;this._y= _y; }// settersetsetY(value...
AI代码解释 classPerson{name:string;age:number;privategender:string;constructor(name:string,age:number,gender:string){this.name=name;this.age=age;this.gender=gender;}say():void{console.log(`name=${this.name},age=${this.age},gender=${this.gender}`);}}classStudentextendsPerson{constructor(name...
private name: string; constructor(name: string) { = name; // 可以在构造函数中访问和修改私有属性 } greet() { console.log(`Hello, my name is ${}.`); // 可以在类的方法中访问私有属性 } } const person = new Person("Alice");
与TypeScripts 的private不同,JavaScript 的私有字段(#) 在编译后仍然是私有的,并且不提供前面提到的像括号符号访问这样的转义舱口,这使得它们很难私有。 class Dog { #barkAmount = 0; personality = "happy"; constructor() {} } "use strict"; ...
class Person{ public name:string; // public、private、static 是 typescript 中的类访问修饰符 age:number; constructor(name:string,age:number){ this.name = name; this.age = age; } tell(){ console.log(this.name + this.age); } } class Student extends Person{ gender:string; constructor(gen...
typescript - 修饰符 private 、public、protected 1、默认为public 2、当成员被标记为private时,它就不能在声明它的类的外部访问 class Animal { private name: string; constructor(theName: string) {this.name =theName; } } let a=newAnimal('Cat').name;//错误,‘name’是私有的...
...privatecolor:string;...constructor(publicname:string,width:number,height:number){... 由于color 成员变量设置了 private,所以会出现以下信息: class.ts(24,41):Theproperty'color'doesnotexist on value of type'Shape' 继承 最后,我们可以继承一个已存在的类并创建一个派生类,继承使用关键字extends。
constructor( name: string = '小可爱', age: number = 20, gender: string, weight: string, likes?: Array<any> ) { // 初始化属性中的数据 = name this.age = age this.gender = gender this.weight=weight } // 定义实例方法 say() { ...