Re: Suggestions to make cleaner code

From:
 #2pencil <number2pencil@gmail.com>
Newsgroups:
comp.lang.java.programmer
Date:
Thu, 12 Jul 2007 10:35:15 -0700
Message-ID:
<1184261715.591295.97840@d55g2000hsg.googlegroups.com>
On Jun 25, 3:24 pm, "Greg R. Broderick"
<usenet200...@blackholio.dyndns.org> wrote:

#2pencil <number2pen...@gmail.com> wrote in news:1182784240.034919.238870
@w5g2000hsg.googlegroups.com:

/**
 *
 * Date usage.
 *
 **/

import java.io.*;


Code doesn't use any io classes, no need to import them.

import java.util.*;


Sloppy coding to import entire package, especially in the case of java.util,
because there's a class name collision between java.util.Date and
java.sql.Date. Better to explicitly name the classes you want to import.

import java.awt.*;


Code doesn't use any AWT classes, no need to import them.

import java.applet.Applet;


Code doesn't use Applet class, no need to import it.

/**
 *
 * @author #2pencil (www.akroncdnr.com)
 *
 **/

public class date_ex {


Class name does not follow Java naming conventions.

     public static void main(String[] args) throws IOException {
     //public void init() {
          Calendar now = Calendar.getInstance();
          int day=now.get(Calendar.DAY_OF_WEEK);
          int month=now.get(Calendar.MONTH);
          int date=now.get(Calendar.DAY_OF_MONTH);
          String strday = "";
          String strmonth = "";

          day=now.get(Calendar.DAY_OF_WEEK);
          month=now.get(Calendar.MONTH);
          date=now.get(Calendar.DAY_OF_MONTH);

          if(day==1)strday="Sunday";


Don't put the conditional on the same line as the condition -- when you're
single-stepping through the code in the debugger, it is very difficult to
tell whether you took the branch or not. Instead, use:

           if(day==1)
               strday="Sunday";

          if(day==2)strday="Monday";


Don't hard-code the day numbers. java.util.Calendar has built-in constants
(public static final fields) for these.

          if(day==3)strday="Tuesday";


Instead of doing any of this, why not just pass the date to
java.text.SimpleDateFormat, configured with the appropriate format string?

          if(day==4)strday="Wednesday";


Your use of (or your failure to use) horizontal white space renders this code
considerably less legible. I'd suggest

           if (day == 4)
               strday = "Wednesday";

          if(day==5)strday="Thursday";
          if(day==6)strday="Friday";
          if(day==7)strday="Saturday";

          if(month==0)strmonth="January";
          if(month==1)strmonth="February";
          if(month==2)strmonth="March";
          if(month==3)strmonth="April";
          if(month==4)strmonth="May";
          if(month==5)strmonth="June";
          if(month==6)strmonth="July";
          if(month==7)strmonth="August";
          if(month==8)strmonth="September";
          if(month==9)strmonth="October";
          if(month==10)strmonth="November";
          if(month==11)strmonth="December";

          System.out.print("Hello!\n");
          System.out.print("Welcome: "+strday+" the "+date+" of "+strmonth
+"!");
    }
}


Cheers!
GRB

--
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Greg R. Broderick usenet200...@blackholio.dyndns.org

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Thank you, this is exactly what I was looking for. I've been writting
in C for many years, but am new to Java. Sure it works, but it's best
to stop bad habbits before they begin!

Thanks again,
-#2pencil-
http://www.akroncdnr.com
http://www.greattrainnetwork.com

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