Thread: Network Program

 
// File Name : URLDemo.java 
import java.net.*; 
import java.io.*; 
public class URLDemo 
{ 
public static void main(String[] args) 
{
try { 
URL url =new URL(args[0]); 
System.out.println("URL is "+ url.toString()); 
System.out.println("protocol is "+ url.getProtocol()); 
System.out.println("authority is "+ url.getAuthority()); 
System.out.println("file name is "+ url.getFile()); 
System.out.println("host is "+ url.getHost()); 
System.out.println("path is "+ url.getPath()); 
System.out.println("port is "+ url.getPort()); 
System.out.println("default port is "+ url.getDefaultPort()); 
System.out.println("query is "+ url.getQuery()); 
System.out.println("ref is "+ url.getRef()); 
}catch(IOException e) 
{ 
e.printStackTrace(); 
} 
} 
}

Error:
It gives me ArrayIndexOutOfBoundException
at location Url url = new Url(args[0]);

what should I do?

I think you are not providing "Run Time Arguement" that's why it gives ArrayIndexOutOfBoundException.