小编Ank*_*hah的帖子

在Java中,静态方法和变量可以通过对象引用访问,就像在下面的程序中一样,它工作得很好:

//StaticDemo.java
class StaticVerifier{
    private int a,b;
    public StaticVerifier(int a,int b){
        this.a = a;
        this.b = b; 
        System.out.println("Values are "+this.a+" "+this.b);
    }   
    public static void takeAway(){
        System.out.println("This is a static method...");
    }
}
public class StaticDemo{
    public static void main(String[] args){
        StaticVerifier sv = new StaticVerifier(3,4);
        sv.takeAway();
    }
}

但是当我尝试在C#中转换相同的代码时,它不允许对象访问静态方法并给出编译时错误.请参阅下面的代码和相关错误:

//StaticDemo.cs
using System;
public class StaticVerifier{
    private int a,b;
    public StaticVerifier(int a,int b){
        this.a = a;
        this.b = b; 
        Console.WriteLine("Values are "+this.a+" "+this.b);
    }   
    public static void takeAway(){
        Console.WriteLine("This is …

HttpResponseclass（在@ angular / common / http中）是@ angular / http（不推荐使用）的类Response的替换。看文档并没有太多关于如何使用它的想法！此外，我试图替换旧的角度代码，但由于此类是通用的，因此需要类型，例如。赋予它类型将产生错误，如：HttpResponse<T>

get(path: string, params: HttpParams = new HttpParams()): Observable<any> {
  return this.http.get(`${environment.api_url}${path}`, { headers: this.setHeaders(), search: params })
  .catch(this.formatErrors)
  .map((res: HttpResponse<any>) => res.json());