Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Converting Dates in string format to readable date in JAVA using Tokens...PLEASE HELP!!!!

Posted on 2004-09-15
6
Medium Priority
?
303 Views
Last Modified: 2012-05-05
I have a problem trying to convert a date in mm/dd/yyyy format to a readable date.  I do not want to use the simpleDateFormat class.  I am able to split the mm/dd/yyyy format by delimiting it with a token but now I am having a problem trying to convert it to the readable date format.  If i coment out the large conditionals this is the result I get so far:

------------------------------------------------------------------------------------------------------------
Enter a date in mm/dd/yyyy format then press enter:
12/25/2004

Conversion of this date in readable format is:
12 25 2004
------------------------------------------------------------------------------------------------------------

I want to take the first token (the 12) and convert it to a string "December" and then print out the 25 and 2004 so it reads December 25, 2004.
Can anyone please help me debug my code!?!?!? thanks

import java.util.*;

public class dates
{
      public static void main( String args[] )
      {
            Scanner scanner = new Scanner( System.in );
            System.out.println( "Enter a date in mm/dd/yyyy format then press enter:" );
            String date = scanner.nextLine();

            StringTokenizer tokens = new StringTokenizer( date, "/" );
            
            
            System.out.println( "Conversion of this date in readable format is: " );

            while ( tokens.hasMoreTokens() )
            {
                  if( tokens.nextToken() == "01" )
                  {
                        System.out.printf( "January " );
                  }
                  if( tokens.nextToken() == "02" )
                  {
                        System.out.printf( "February " );
                  }
                  if( tokens.nextToken() == "03" )
                  {
                        System.out.printf( "March " );
                  }
                  if( tokens.nextToken() == "04" )
                  {
                        System.out.printf( "April " );
                  }
                  if( tokens.nextToken() == "05" )
                  {
                        System.out.printf( "May " );
                  }
                  if( tokens.nextToken() == "06" )
                  {
                        System.out.printf( "June " );
                  }
                  if( tokens.nextToken() == "07" )
                  {
                        System.out.printf( "July " );
                  }
                  if( tokens.nextToken() == "08" )
                  {
                        System.out.printf( "August " );
                  }
                  if( tokens.nextToken() == "09" )
                  {
                        System.out.printf( "September " );
                  }
                  if( tokens.nextToken() == "10" )
                  {
                        System.out.printf( "October " );
                  }
                  if( tokens.nextToken() == "11" )
                  {
                        System.out.printf( "November " );
                  }
                  if( tokens.nextToken() == "12" )
                  {
                        System.out.printf( "December " );
                  }

                  System.out.println( tokens.nextToken() + "," );
            }
            

      }
}
0
Comment
Question by:djchiena
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
6 Comments
 
LVL 92

Expert Comment

by:objects
ID: 12071285
you need to check for string equality (using equals() method) instead of object equality

change:

  if( tokens.nextToken() == "01" )

to:

  if( tokens.nextToken().equals("01") )

same for the rest of the if's.

0
 
LVL 92

Accepted Solution

by:
objects earned 2000 total points
ID: 12071293
you also need to only call nextToken() once, every time you call it parse anotyher token from string

String month = tokens.nextToken();
String day = tokens.nextToken();
String year = tokens.nextToken();
if (month.equals("01"))
{
   System.out.println("January");
}
else if (month.equals("02"))
{
   System.out.println("February");
}
etc.
0
 
LVL 92

Expert Comment

by:objects
ID: 12071298
might also be better to parse the string to an int eg.

int month = Integer.parseInt(tokens.nextToken());
if (month==1)
{
   ...
}
else if (month==2)
{
   etc.
0
The top UI technologies you need to be aware of

An important part of the job as a front-end developer is to stay up to date and in contact with new tools, trends and workflows. That’s why you cannot miss this upcoming webinar to explore the latest trends in UI technologies!

 

Author Comment

by:djchiena
ID: 12071353
you are the man! Thanks alot for your help!!!
0
 

Expert Comment

by:Emilda
ID: 12071392
Instead of using if-else statement you can use a String array to hold the names of month as well as shown below.

// First entry is given as empty as array index starts from 0.
String[] months = { "Empty", "January ", "February ", "March ", "April ", "May ", "June ",                                      "July ", "August ", "September ", "October ", "November ", "December "};

Then do as objects suggested,

String month = tokens.nextToken();
String day = tokens.nextToken();
String year = tokens.nextToken();
         
int index = Integer.decode(month).intValue();           // To convert to int value.
System.out.println( "Conversion of this date in readable format is: " );
                   
System.out.println( months[index] + day + "," + year);  

0
 
LVL 92

Expert Comment

by:objects
ID: 12071397
no worries :)
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
In this post we will learn different types of Android Layout and some basics of an Android App.
The viewer will learn how to implement Singleton Design Pattern in Java.
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …
Suggested Courses

722 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question