HttpURLConnection checkurl

//2012-04-06 johnpfeiffer
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class CheckURL
{
    public static final int CONNECTIONTIMEOUT = 5000;
    public static final int READTIMEOUT = 5000;

    CheckURL()
    {
    }

    boolean isValid( String input )
    {
      HttpURLConnection urlConnection = null;
      boolean result = false;
      try
      {
        URL url = new URL( input );
        urlConnection = (HttpURLConnection) url.openConnection();
        //HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();

        urlConnection.setRequestMethod( "HEAD" );
        urlConnection.setConnectTimeout( CONNECTIONTIMEOUT );       /* timeout after 5s if can't connect */
        urlConnection.setReadTimeout( READTIMEOUT );            /* timeout after 5s if the page is too slow */
        urlConnection.connect();
        String location = urlConnection.getHeaderField( "Location" );
        if( location != null && !location.equals( input ) )
        {
            System.out.println( "INFO:Redirect:" + location );
            result = false;
        }else
        {
            if( urlConnection.getResponseCode() == HttpURLConnection.HTTP_OK )
            {       result = true;
            }
        }

      }catch( MalformedURLException me )
      {     System.err.print( "ERROR:MalformedURL " );
      }catch( Exception e )
      {     //  e.printStackTrace();
      }finally
      {     if (urlConnection != null)
            {   urlConnection.disconnect();
            }
      }
      return result;
    }

    public static String usage()
    {       return "Usage (5 second timeout by default): java -jar CheckURL http://domain.com";
    }

    public static void main( String[] args )
    {
        CheckURL c = new CheckURL();
        if( args.length == 1 )
        {       System.out.println( c.isValid( args[0] ) );
        }else
        {       System.out.println( usage() );
                System.out.println( "https://google.com = " + c.isValid( "https://google.com" ) );
                System.out.println( "http://testabcd1234testabcd.com = " + c.isValid( "http://testabcd1234testabcd.com" ) );
                System.out.print( "htp:/testabcd1234testabcdcom " + c.isValid( "htp:/testabcd1234testabcdcom" ) );
        }
    }
} //end class