// Can't access from outside the class console.log(b.x); // Property 'x' is private and only accessible within class 'Base'. class Derived extends Base { showX() { // Can't access in subclasses console.log(this.x); // Property 'x' is private and only accessible within class '...
class Base { protected baseUrl: string = 'http://api.com/' constructor() {} protected request(method: string) { const url = `${this.baseUrl}${method}` // TODO 封装基础的 http 请求 } } class Address extends Base { get() { return this.request('address') } } 代码解释: 第2 行,...
// Can't access from outside the class console.log(b.x); //Property 'x' is private and only accessible within class 'Base'. class Derived extends Base { showX() { // Can't access in subclasses console.log(this.x); // Property 'x' is private and only accessible within class 'B...
class Myclasss implements myinter{ name: string sayHello(): void { throw new Error("Method not implemented.") } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 8. 属性的封装 方式一: 借助我们的方法 实现间接的修改我们的属性 class Person(){ private _name:string; private _ag...
TypeScript(和 JavaScript) 并没有名为静态类(static class)的结构,但是像 C# 和 Java 有。所谓静态类,指的是作为类的静态成员存在于某个类的内部的类。比如这种:// javapublic class OuterClass { private static String a = "1";static class InnerClass { private int b = 2; }} 静态类...
TypeScript(和 JavaScript) 并没有名为静态类(static class)的结构,但是像 C# 和 Java 有。 所谓静态类,指的是作为类的静态成员存在于某个类的内部的类。比如这种: // java public class OuterClass { private static String a = "1"; static class InnerClass { ...
A private property of method can only be accessed or called from the class instance itself. Let's take a look at an example private property. export class Person { // declare our property types firstName: string; lastName: string; private _age: number; // when accessing the age property...
move(); // Derived class method d.woof(3); 方法重写 子类继承父类之后,可以重写属性和方法 代码语言:javascript 代码运行次数:0 运行 AI代码解释 class Base { greet() { console.log("Hello, world!"); } } class Derived extends Base { greet(name?: string) { if (name === undefined) { ...
TypeScript(和 JavaScript) 并没有名为静态类(static class)的结构,但是像 C# 和Java有。 所谓静态类,指的是作为类的静态成员存在于某个类的内部的类。比如这种: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 // javapublicclassOuterClass{privatestaticString a="1";staticclassInnerClass{privateint b...
包含”extends”子句的类被称为派生类(derived class),“extends“子句中指定的类是派生类的基类(base class)。当一个类继承规范省略了”extends“子句时,此类就没有基类。 类继承指定必须满足以下约束,否则会出现编译时报错。 如果”extend“子句指定了类型引用,那么此类型必须为类类型。此外,当作为表达式计算时,此...