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Java Forum / General / February 2006Maximum length of Static name?
This is probably a silly question but is there a maximum number of characters for a static name? i.e public static final int ABCDEFGHIJKLMOPQRSTUVWXYZ........... = 1; Hi, I think there is no limit if it is alaways represented as a String object like in : getField(String name) from class java.lang.Class . But, why would you care? Arnaud > This is probably a silly question but is there a maximum number of > characters for a static name? > > i.e > > public static final int ABCDEFGHIJKLMOPQRSTUVWXYZ........... = 1; I have some statics that need to be 30'ish chars long to make them understandable, seem to remember something somewhere ignoring chars after 32 - really can't remember where, may have even been Cobol many years ago! Many thanks for all replies! > Hi, > [quoted text clipped - 13 lines] > > > > public static final int ABCDEFGHIJKLMOPQRSTUVWXYZ........... = 1; Don't know about Cobol, but earlier versions of Fortran had very small limits. I was maintaining some Fortran about a year ago and asked why a currency conversion rate was something like fxq2ctq and was informed that Fortan's original limitations were 7 characters for uniquness and that alot of them got used up. This is not a problem for Java. Java does not truncate identifiers. Opalinski opalpa@gmail.com http://www.geocities.com/opalpaweb/ > Don't know about Cobol, but earlier versions of Fortran had very small > limits. I was maintaining some Fortran about a year ago and asked why > a currency conversion rate was something like fxq2ctq and was informed > that Fortan's original limitations were 7 characters for uniquness and > that alot of them got used up. IIRC Whitesmith's 'C' silently ignored anything after 6 chars. We tended to use longer indentifiers for readability. This led to an EVIL bug when we upgraded the compiler; we some variable that differed (due a typo) in char 7 (or 8 or something). Code ran under Whitesmiths, but not under the new comp. BugBear On 1 Feb 2006 08:20:31 -0800, "opalpa@gmail.com opalinski from opalpaweb" <opalpa@gmail.com> wrote, quoted or indirectly quoted someone who said : >Fortan's original limitations were 7 characters for uniquness and >that alot of them got used up. Seems to me the Fortran I used in the early 60s had a 6 character identifier limit. Character handling was done by packing 6 6-bit bytes into a 36-bit int. You only had word addressing on the IBM 7044 and Univac 1106. You had a local 6-bit character set you defined yourself for the shop and a custom printer chain to print it. I remember how modern and oddly European the notion of ASCII seemed. We are going through a period of consolidating 8- bit charsets into a single 16 bit one, similar to the way we years ago consolidated many 60bit char sets into a 7 bit one. Even seven bits seemed expansive at the time, and the use of lower case effete. You had to get special permission to print anything in lower case since the print chain was so much slower with all those extra characters on it.  SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. >I have some statics that need to be 30'ish chars long to make them >understandable, seem to remember something somewhere ignoring chars after >32 - really can't remember where, may have even been Cobol many years ago! might have been IBM PL/If or Univac 90/30 COBOL. One of them just quietly ignored the tail ends of your identifiers leading to some very peculiar bugs. SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. >This is probably a silly question but is there a maximum number of >characters for a static name? There are no "static names" in Java. I assume, you meant "for an identifier". The answer is given by the Java Language Specification, Third Edition in Section 3.8: »An identifier is an unlimited-length sequence of Java letters and Java digits, the first of which must be a Java letter.« There is a limit in implementaitons I've used. Error message is like: UTF8 representation for string "ABCDEFGHIJKLMOPQRSTUVWXYZ..." is too long for the constant pool. Also there used to be, haven't run into it for while, probably still there, a limit on class size. Used to be 640000 bytes. Opalinski opalpa@gmail.com http://www.geocities.com/opalpaweb/ The limit is pretty big for String names for practical purposes btw, you can make it thousands of characters long. > Also there used to be, haven't run into it for while, probably still > there, a limit on class size. Used to be 640000 bytes. This might have been a source size limit. I don't remember. Opalinski opalpa@gmail.com http://www.geocities.com/opalpaweb/ On 1 Feb 2006 07:45:26 -0800, "opalpa@gmail.com opalinski from opalpaweb" <opalpa@gmail.com> wrote, quoted or indirectly quoted someone who said : >Also there used to be, haven't run into it for while, probably still >there, a limit on class size. Used to be 640000 bytes. A local identifier does not go into the class file. SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. >This is probably a silly question but is there a maximum number of >characters for a static name? see http://mindprod.com/jgloss/naming.html#TECHNICAL SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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