function in derby[beginner]

2 Message(s) by 2 Author(s) originally posted in java language

From: tony_se

Date: Saturday, March 31, 2007

I have this class

1. <programming> The prototype for an {object} in an
	{object-oriented language}; analogous to a {derived type} in a
	{procedural language}.  A class may also be considered to be a
	set of objects which share a common structure and behaviour.
	The structure of a class is determined by the {class
	variables} which represent the {state} of an object of that
	class and the behaviour is given by a set of {methods}
	associated with the class.

	Classes are related in a {class hierarchy}.  One class may be
	a specialisation (a "{subclass}") of another (one of its
	"{superclasses}") or it may be composed of other classes or it
	may use other classes in a {client-server} relationship.  A
	class may be an {abstract class} or a {concrete class}.

	See also {signature}.

	2. <programming> See {type class}.

	3. <networking> One of three types of {Internet addresses}
	distinguished by their most significant bits.

	3. <language> A language developed by the {Andrew Project}.
	It was one of the first attempts to add {object-oriented}
	features to {C}.

	(1995-05-01)

:
public class Say {
public static int

1. <programming> A common name for the {integer} data type.
	In {C} for example, it means a (signed) integer of the
	computer's native {word length}.

	2. <networking> The {top-level domain} for international
	organisations.

	(1999-01-26)

say(int i) {
System.out.println("* Say: " + i);
return i;
}

public static int say2(String msg) {
System.out.println("** " + msg);
return 1;
}
}

and I created a function

1. <mathematics> (Or "map", "mapping") If D and C are sets
	(the domain and codomain) then a function f from D to C,
	normally written "f : D -> C" is a subset of D x C such that:

	1. For each d in D there exists some c in C such that (d,c) is
	an element of f.  I.e. the function is defined for every
	element of D.

	2. For each d in D, c1 and c2 in C, if both (d,c1) and (d,c2)
	are elements of f then c1 = c2.  I.e. the function is uniquely
	defined for every element of D.

	See also {image}, {inverse}, {partial function}.

	2. <programming> Computing usage derives from the mathematical
	term but is much less strict.  In programming (except in
	{functional programming}), a function may return different
	values each time it is called with the same argument values
	and may have {side effects}.

	A {procedure} is a function which returns no value but has
	only {side-effects}.  The {C} language, for example, has no
	procedures, only functions.  {ANSI C} even defines a {type},
	{void}, for the result of a function that has no result.

	(1996-09-01)

in Derby:
create function say2(msg varchar(50)) returns integer
parameter

<programming> (Or "parameter") A name in a {function} or
	{subroutine} definition that is replaced by, or bound to, the
	corresponding {actual argument} when the function or
	subroutine is called.  In many languages formal arguments
	behave like {local variables} which get initialised on entry.

	See: {argument}.

	(2002-07-02)

style JAVA no sql language

1. <language, programming> {programming language}.

	2. <human language> {natural language}.

	(1998-09-07)

JAVA
external name 'Say.say2';

but when I want to use it, error

1. A discrepancy between a computed, observed, or measured
	value or condition and the true, specified, or theoretically
	correct value or condition.

	2. <programming> A mental mistake made by a programmer that
	may result in a program {fault}.

	3. (verb) What a program does when it stops as result of a
	programming error.

	(2000-03-28)

occurs:
ERROR 42X50: No method

<programming> The name given in {Smalltalk} and other
	{object-oriented languages} to a procedure or routine
	associated with one or more {classes}.  An {object} of a
	certain class knows how to perform actions, e.g. printing
	itself or creating a new instance of itself, rather than the
	function (e.g. printing) knowing how to handle different types
	of object.

	Different classes may define methods with the same name
	(i.e. methods may be {polymorphic}).  The term "method" is used
	both for a named operation, e.g. "PRINT" and also for the code
	which a specific class provides to perform tha
	t operation.

	Most methods operate on objects that are instances of a
	certain class.  Some object-oriented languages call these
	"object methods" to distinguish then from "{class methods}".

	In {Smalltalk}, a method is defined by giving its name,
	documentation, temporary local variables and a sequence of
	expressions separated by "."s.

	(2000-03-22)

was found that matched the method call
Say.say2(JAVA.lang
.String), tried all combinations of object

<object-oriented> In {object-oriented programming}, an
	instance of the data structure and behaviour defined by the
	object's {class}.  Each object has its own values for the
	{instance variables} of its class and can respond to the
	{methods} defined by its class.

	For example, an object of the "Point" class might have
	instance variables "x" and "y" and might respond to the "plot"
	method by drawing a dot on the screen at those coordinates.

	(2004-01-26)

and primitive

<programming> A {function}, {operator}, or {type} which is
	built into a programming language (or {operating system}),
	either for speed of execution or because it would be
	impossible to write it in the language.  Primitives typically
	include the arithmetic and logical operations (plus, minus,
	and, or, etc.) and are implemented by a small number of
	{machine language} instructions.

	(1995-05-01)

types and any
possible
type conversion for any parameters the method call may have. The
method might e
xist but it isn't public and/or static, or the parameter types are
not method I
nvocation convertible.

And I created another function:
create function say(i integer) returns integer
parameter style JAVA no sql language JAVA
external name 'Say.say';

It works fine.

I have tried hard to figure it out but failed. Can anybody help me?

Thank you in advance!!!

From: Lew

Date: Saturday, March 31, 2007

wrote in message

In {object-oriented programming} sending a message to an
	{object} (to invoke a {method}) is equivalent to calling a
	{procedure} in traditional programming languages, except that
	the actual code executed may only be selected at run time
	depending on the {class} of the object.  Thus, in response to
	the message "drawSelf", the method code invoked would be
	different if the target object were a circle or a square.

	(1995-02-16)

I have this class:
public class Say {
public static int say(int i) {
System.out.println("* Say: " + i);
return i;
}
public static int say2(String msg) {
System.out.println("** " + msg);
return 1;
}
}

Please don't multi-post, that is, send the same message independently to
different newsgroups. It fragments the thread

1. See {multithreading}.

	2. See {threaded code}.

	3. {topic thread}.

	[{Jargon File}]

and does not let people see all
the answers to your question.

Instead, cross-post, if you really, really, really must reach multiple groups,
preferably with "followup" set to one of the groups.

Like this reply, cross-posted to alt.comp.lang.JAVA, clj.help,
comp.lang.JAVA.programmer and clj.databases, with f/u set to clj.help.

-- Lew

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