求助：关于URL输出的问题

Question

import java.net.*;
import java.io.*;
import java.util.Scanner;public class URLDemo 
{    public static void main (String[] args) throws Exception
     {
     URL url=new URL("htpp","www.mldnjava.cn",80,"/project.htm");
     InputStream input=url.openStream();
     Scanner scan=new Scanner(input);
     scan.useDelimiter("\n");
     while(scan.hasNext())
     {
     System.out.println (scan.next());
     }
        }
    
    
}
编译后出现--------------------Configuration: <Default>--------------------
Exception in thread "main" java.net.MalformedURLException: unknown protocol: htpp
    at java.net.URL.<init>(URL.java:395)
    at java.net.URL.<init>(URL.java:283)
    at URLDemo.main(URLDemo.java:17)Process completed.

Answer 1

URL url=new URL("htpp","www.mldnjava.cn",80,"/project.htm");
改为
URL url=new URL("http","www.mldnjava.cn",80,"/project.htm");