public Strftime(String origFormat) 
{
        translate = new Properties();
        translate.put("a","EEE");
        translate.put("A","EEEE");
        translate.put("b","MMM");
        translate.put("B","MMMM");
        translate.put("c","EEE MMM d HH:mm:ss yyyy");
        //There's no way to specify the century in SimpleDateFormat.  We don't want to hard-code
        //20 since this could be wrong for the pre-2000 files.
        //translate.put("C", "20");
        translate.put("d","dd");
        translate.put("D","MM/dd/yy");
        translate.put("e","dd"); //will show as '03' instead of ' 3'
        translate.put("F","yyyy-MM-dd");
        translate.put("g","yy");
        translate.put("G","yyyy");
        translate.put("H","HH");
        translate.put("h","MMM");
        translate.put("I","hh");
        translate.put("j","DDD");
        translate.put("k","HH"); //will show as '07' instead of ' 7'
        translate.put("l","hh"); //will show as '07' instead of ' 7'
        translate.put("m","MM");
        translate.put("M","mm");
        translate.put("n","\n");
        translate.put("p","a");
        translate.put("P","a");  //will show as pm instead of PM
        translate.put("r","hh:mm:ss a");
        translate.put("R","HH:mm");
        //There's no way to specify this with SimpleDateFormat
        //translate.put("s","seconds since ecpoch");
        translate.put("S","ss");
        translate.put("t","\t");
        translate.put("T","HH:mm:ss");
        //There's no way to specify this with SimpleDateFormat
        //translate.put("u","day of week ( 1-7 )");
        //There's no way to specify this with SimpleDateFormat
        //translate.put("U","week in year with first sunday as first day...");
        translate.put("V","ww"); //I'm not sure this is always exactly the same
        //There's no way to specify this with SimpleDateFormat
        //translate.put("W","week in year with first monday as first day...");
        //There's no way to specify this with SimpleDateFormat
        //translate.put("w","E");
        translate.put("X","HH:mm:ss");
        translate.put("x","MM/dd/yy");
        translate.put("y","yy");
        translate.put("Y","yyyy");
        translate.put("Z","z");
        translate.put("z","Z");
        translate.put("%","%");
        String convertedFormat = convertDateFormat( origFormat );
        simpleDateFormat = new SimpleDateFormat( convertedFormat );
}

Create an instance of this date formatting class

Also see:

Strftime( String, Locale )

 public Strftime(String origFormat,
    Locale locale) 
{
        String convertedFormat = convertDateFormat( origFormat );
        simpleDateFormat = new SimpleDateFormat( convertedFormat, locale );
}

Create an instance of this date formatting class

Parameters:

origFormat - the strftime-style formatting string

locale - the locale to use for locale-specific conversions

 protected String convertDateFormat(String pattern) 
{
        boolean inside = false;
        boolean mark = false;
        boolean modifiedCommand = false;
        StringBuffer buf = new StringBuffer();
        for(int i = 0; i <  pattern.length(); i++) {
            char c = pattern.charAt(i);
            if ( c=='%" && !mark ) {
                mark=true;
            } else {
                if ( mark ) {
                    if ( modifiedCommand ) {
                        //don't do anything--we just wanted to skip a char
                        modifiedCommand = false;
                        mark = false;
                    } else {
                        inside = translateCommand( buf, pattern, i, inside );
                        //It's a modifier code
                        if ( c=='O" || c=='E" ) {
                            modifiedCommand = true;
                        } else {
                            mark=false;
                        }
                    }
                } else {
                    if ( !inside && c != ' " ) {
                        //We start a literal, which we need to quote
                        buf.append("'");
                        inside = true;
                    }
                    buf.append(c);
                }
            }
        }
        if ( buf.length()  > 0 ) {
            char lastChar = buf.charAt( buf.length() - 1 );
            if( lastChar!='\'" && inside ) {
                buf.append('\'");
            }
        }
        return buf.toString();
}

Search the provided pattern and get the C standard Date/Time formatting rules and convert them to the Java equivalent.

 public String format(Date date) 
{
        return simpleDateFormat.format( date );
}

Format the date according to the strftime-style string given in the constructor.

 public TimeZone getTimeZone() 
{
        return simpleDateFormat.getTimeZone();
}

Get the timezone used for formatting conversions

 protected String quote(String str,
    boolean insideQuotes) 
{
        String retVal = str;
        if ( !insideQuotes ) {
            retVal = '\'" + retVal + '\'";
        }
        return retVal;
}

 public  void setTimeZone(TimeZone timeZone) 
{
        simpleDateFormat.setTimeZone( timeZone );
}

Change the timezone used to format dates

 protected boolean translateCommand(StringBuffer buf,
    String pattern,
    int index,
    boolean oldInside) 
{
        char firstChar = pattern.charAt( index );
        boolean newInside = oldInside;
        //O and E are modifiers, they mean to present an alternative representation of the next char
        //we just handle the next char as if the O or E wasn't there
        if ( firstChar == 'O" || firstChar == 'E" ) {
            if ( index + 1 <  pattern.length() ) {               
                newInside = translateCommand( buf, pattern, index + 1, oldInside );
            } else {
                buf.append( quote("%" + firstChar, oldInside ) );
            }
        } else {
            String command = translate.getProperty( String.valueOf( firstChar ) );
            //If we don't find a format, treat it as a literal--That's what apache does
            if ( command == null ) {
                buf.append( quote( "%" + firstChar, oldInside ) );
            } else {
                //If we were inside quotes, close the quotes
                if ( oldInside ) {
                    buf.append( '\'" );
                }
                buf.append( command );
                newInside = false;
            }
        }
        return newInside;
}

Try to get the Java Date/Time formatting associated with the C standard provided.