class TestClass {http: Http;constructor(http: Http){this.http = http;}
}

class Animal {public name: string;public constructor(theName: string){this.name = theName;}public move(distanceInMeters: number){console.log(`${this.name} moved ${distanceInMeters}m.`);}
}

class Student {fullName: string;constructor(public firstName, public middleInitial, public lastName) {this.fullName = firstName + " " + middleInitial + " " + lastName;}
}interface Person {firstName: string;lastName: string;
}function greeter(person : Person) {return "Hello, " + person.firstName + " " + person.lastName;
}let user = new Student("Jane", "M.", "User");document.body.innerHTML = greeter(user);

class Animal {private name: string;constructor(theName: string){this.name = theName;}
}new Animal('Cat').name; // 错误：’name‘是私有的

class Person{protected name: string;constructor(name: string){this.name = name;}
}class Employee extends Person{private department: string;constructor(name: string, department: string){super(name)this.department = department;}public getElevatorPitch() {return `Hello, my name is ${this.name} and I work in ${this.department}.`;}
}let howard = new Employe("Howard", "Sales");
console.log(howard.getElevatorPitch());
console.log(howard.name); // 错误

class Person {protected name: string;protected constructor(theName: string) { this.name = theName; }
}// Employee 能够继承 Person
class Employee extends Person {private department: string;constructor(name: string, department: string) {super(name);this.department = department;}public getElevatorPitch() {return `Hello, my name is ${this.name} and I work in ${this.department}.`;}
}let howard = new Employee("Howard", "Sales");
let john = new Person("John"); // 错误: 'Person' 的构造函数是被保护的.

class Octopus {readonly name: string;readonly numberOfLegs: number = 8;constructor (theName: string) {this.name = theName;}
}
let dad = new Octopus("Man with the 8 strong legs");
dad.name = "Man with the 3-piece suit"; // 错误! name 是只读的.

class TestClass {constructor(name: string, private address: string, public city){testMethod(){console.log(this.name)// Compiler error: property 'name' does not exist on type 'TestClass'.console.log(this.address);console.log(this.city);}}
}const testClass = new TestClass('Johnson', '8 gaoke road', 'NanNing');
testClass.testMethod();console.log(testClass.name); // Compiler error: property 'name' does not exist on type 'TestClass'.
console.log(testClass.address); // Compiler error: 'address' is private and only accessible within class 'TestClass'.
console.log(testClass.city) // NanNing