debug16_1.java

北京大学出版社的

package questions.c16;
import java.net.*;
public class Debug16_1 {
   public static void main( String[] args ) {
      if ( args.length >= 1 ) {
         URL x = new URL( args[0] );
         URLConnection xConnect = x.openConnection();
         System.out.println( x + " has content type "
                             + xConnect.getType() );
      } else {
         System.out.println( "Please enter a URL" );
      }
   }
}