TypeScript-类存取器 和 TypeScript-抽象类

class Person {
    private _age: number = 0;
    set age(val: number) {
        console.log('进入了set age方法');
        if (val < 0) {
            throw new Error('人的年龄不能小于零');
        }
        this._age = val;
    }

    get age(): number {
        console.log('进入了get age方法');
        return this._age;
    }
}

let p = new Person();
p.age = 18;

// 如下👇代码本质类同：p.age(-6);
// p.age = -6;
console.log(p.age);

abstract class Person {
    abstract name: string;

    abstract say(): void;
}

class Student extends Person {
    name: string = 'BNTang';

    say(): void {
        console.log(`我的名字是${this.name}`);
    }
}

let p = new Person();

abstract class Person {
    abstract name: string;

    abstract say(): void;
}

class Student extends Person {
    name: string = 'BNTang';

    say(): void {
        console.log(`我的名字是${this.name}`);
    }
}

let stu = new Student();
stu.say();

abstract class Person {
    abstract name: string;

    abstract say(): void;

    eat(): void {
        console.log(`${this.name}正在吃东西`);
    }
}

class Student extends Person {
    name: string = 'BNTang';

    say(): void {
        console.log(`我的名字是${this.name}`);
    }
}

let stu = new Student();
stu.say();
stu.eat();