Read JSON object from Url in AngularJS 2

Hi sir,

i am refering  this link 

https://www.youtube.com/watch?v=oLtwPzr_8uA

to read the array of json object,

like  that i  created  method ..

export class EmployeeService {
  private  _url: string = 'http://localhost:8080/Employee/getEmployeeList';

  constructor(private _http: Http) {
  }

 public getallemployee() {
     return this._http.get(this._url)
      .map((response: Response ) => response.json());
  }
}

but i am not able to read the json data, so what can i place in the _url,

my method getEmployeeList return array of json object,

thanks and regards

siddu