Barry, If you think that this is bad try 390 mainframe EBCDIC shift to upper case. You can shift up to 256 characters at a time with a single machine language instruction by ORing a line of spaces to your character field. Now that is bit flipping and is still heavily used.
Carl > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On > Behalf Of Barry Caplan > Sent: Wednesday, January 29, 2003 10:01 PM > To: [EMAIL PROTECTED] > Subject: urban legends just won't go away! > > > http://archive.devx.com/free/tips/tipview.asp?content_id=4151 > > Who knew in this day and age flipping bits to change case is > still publishable (this is from today!) > > Barry Caplan > www.i18n.com > Vendor Showcase: http://Showcase.i18n.com > > > -------------------------------------------------------------- > > Use Logical Bit Operations to Changing Character Case > > > This is a simple example demonstrating my own personal method. > > // to lower case > public char lower(int c) > { > return (char)((c >= 65 && c <= 90) ? c |= 0x20 : c); > } > > //to upper case > public char upper(int c) > { > return (char)((c >= 97 && c <=122) ? c ^= 0x20 : c); > } > /* > If I would I could create a method for converting an entire > string to lower, like this: > */ > public String getLowerString(String s) > { > char[] c = s.toCharArray(); > char[] cres = new char[s.length()]; > for(int i=0;i<c.length;++i) > cres[i] = lower(c[i]); > return String.valueOf(cres); > } > /* > even converting in capital: > */ > public String capital(String s) > { > return > String.valueOf(upper(s.toCharArray()[0])).concat(s.substring(1)); > } > /* using it....*/ > public static void main(String args[]) > { > x xx = new x(); > System.out.println(xx.getLowerString("LOWER: " + "FRAME")); > System.out.println(xx.upper('f')); > System.out.println(xx.capital("randomaccessfile")); > } > > >
