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Date format...

Posted on 2002-04-15
8
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Last Modified: 2008-03-10
Hello,

When I pass in a date like 2000-04-28 to my  getStandardFormat() Method it returns to me 3-28-2000. It reduces the month by one. Why and how can I fix this?

import java.util.*;
import java.sql.*;
import java.text.Format;
public class DateUtil
{
     public static String getStandardFormat(String myDate)
     {          
          // used to parse of the date into correct format.

          java.text.SimpleDateFormat fmt = new java.text.SimpleDateFormat("yyyy-MM-dd");
          GregorianCalendar cldr = new GregorianCalendar();
          try
          {
               cldr.setTime(fmt.parse(myDate));

          }
          catch( java.text.ParseException ex)
          {
               System.out.println("Parse of date failed.");
          }

          int day = cldr.get(Calendar.DAY_OF_MONTH);
          int mon = cldr.get(Calendar.MONTH);
          int year = cldr.get(Calendar.YEAR);
          String stringDate = "MM/DD/YYYY = "+mon+"-"+day+"-"+year;
          return stringDate;
     }
}
0
Comment
Question by:Dsys
8 Comments
 
LVL 4

Expert Comment

by:pellep
ID: 6942929
This is normal. In the Calendar class the month is zero-based. Thus, Calendar.JANUARY is 0.
0
 
LVL 92

Expert Comment

by:objects
ID: 6943401
> String stringDate = "MM/DD/YYYY = "+mon+"-"+day+"-"+year;

Rather than do this, simply use a seperate DateFormat to format your date.
0
 
LVL 1

Expert Comment

by:naveeth
ID: 6943899
import java.util.*;
import java.sql.*;
import java.text.Format;
public class DateUtil
{
    public static String getStandardFormat(String myDate)
    {          
         // used to parse of the date into correct format.

         java.text.SimpleDateFormat fmt = new java.text.SimpleDateFormat("yyyy-MM-dd");
         GregorianCalendar cldr = new GregorianCalendar();
         try
         {
              cldr.setTime(fmt.parse(myDate));

         }
         catch( java.text.ParseException ex)
         {
              System.out.println("Parse of date failed.");
         }

         int day = cldr.get(Calendar.DAY_OF_MONTH);
         int mon = cldr.get(Calendar.MONTH)+1;
         int year = cldr.get(Calendar.YEAR);
         String stringDate = "MM/DD/YYYY = "+mon+"-"+day+"-"+year;
         return stringDate;
    }
}
0
 
LVL 92

Expert Comment

by:objects
ID: 6944029
import java.util.*;
import java.sql.*;
import java.text.Format;
public class DateUtil
{
   public static String getStandardFormat(String myDate)
   {          
        // used to parse of the date into correct format.

        java.text.SimpleDateFormat fmt = new java.text.SimpleDateFormat("yyyy-MM-dd");
        java.text.SimpleDateFormat newfmt = new java.text.SimpleDateFormat("MM-dd-yyyy");
        String stringDate = null;
        try
        {
             stringDate = newfmt.format(fmt.parse(myDate));

        }
        catch( java.text.ParseException ex)
        {
             System.out.println("Parse of date failed.");
        }
        return stringDate;
   }
}

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Author Comment

by:Dsys
ID: 6945071
Objects,

 What about applying that to a getOracleFormat? So far this takes 04-29-2000 and then returns 10-21-0011. Odd! I was expecting 29-APR-2000. What went wrong?

public static String getOracleFormat(String myDate)
{  
     java.text.SimpleDateFormat fmt = new java.text.SimpleDateFormat("MM-dd-yyyy");
     java.text.SimpleDateFormat orclfmt = new java.text.SimpleDateFormat("dd-MMM-yyyy");
     String stringDate = null;
     try
     {
          stringDate = orclfmt.format(fmt.parse(myDate));
     }
     catch( java.text.ParseException ex)
     {
          System.out.println("Setting of date failed.");
     }
     return stringDate;
}
0
 
LVL 92

Accepted Solution

by:
objects earned 50 total points
ID: 6946056
Hmm, that is strange.
I don't think SimpleDateFormat supports producing APR, but that doesn't explain the incorrect date.


Try the following and let me know the output:

public static String getOracleFormat(String myDate)
{  
    java.text.SimpleDateFormat fmt = new java.text.SimpleDateFormat("MM-dd-yyyy");
    java.text.SimpleDateFormat orclfmt = new java.text.SimpleDateFormat("dd-MM-yyyy");
    String stringDate = null;
    try
    {
         System.out.println(myDate);
         Date d = fmt.parse(myDate);
         System.out.println(d);
         stringDate = orclfmt.format(d);
         System.out.println(stringDate);
    }
    catch( java.text.ParseException ex)
    {
         System.out.println("Setting of date failed.");
    }
    return stringDate;
}
0
 
LVL 1

Expert Comment

by:Moondancer
ID: 6956391
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Expert Comment

by:objects
ID: 7017541
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