1. A good de v l r k now s t at
e ope h
t e re is m ore t de v l
h o e opm e nt J A NAM ING
AV
t an program m ing.
h CO NVENTIO NS
A gre at de v l r k now s t at
e ope h
Al ays us e (a f w e xce pt
w e ions dis cus s e d
t e re is m ore t de v l
h o e opm e nt be l ) f l
ow ulEngl h de s cript . Us e l e r
is ors ow
t an de v l
h e opm e nt. cas e lt e rs in ge ne ralbut capit ize t e
e t , al h
f t lt e r of cl s /int rf
irs e t as e ace nam e s and
W h e n you go agains t a s t andard, t e f t lt e r of any non-init w ord
h irs e t ial
docum e nt it Als t
. l andards , e xce pt f or
t is one , can be brok e n. Y m us t
h ou
docum e nt w h y you brok e t eh Ge ne ralConce pts
standard, t e pot nt im pl ions
h e ial icat Us e t rm inol appl
e ogy icabl t t e dom ain
e o h
of bre ak ing t e s t
h andard, and any Us e m ixe d cas e f re adabily
or it
condit ions t at m ay/ us t occur
h m Us e s h ort f orm s s paringl and int l nt y
y e lige l
be fore t e s t
h andard can be appl d t
ie o Av oid l ong nam e s (< 15 ch aract rs )
e
t is s it ion.
h uat Av oid nam e s t at are s im il or
h ar
dif e r onl in cas e
f y
I m
te Exam pl
e Nam ing conv ntion
e
Argum e nt /
s cus t e r , account , - or
om F l
ulEngl h de s cript of val / e ct be ing
is ion ue obj
param e t rs
e - aCus t e r , anAccount
om pas s e d, pos s ibl pre f
y ixing t e nam e w it ‘a’ or ‘an.’
h h
F l /prope rt s
ie ds ie f t
irs Nam e , l t
as Nam e , F l
ulEngl h de s cript
is ion, 1s t lt e r l e rcas e ,
e t ow
w arpSpe e d 1s t lt e r of any non-init w ord in uppe rcas e
e t ial
Boolan ge t e r
e t is P rs is t nt , is St
e e () ring() P f d w it ‘is ’
e ixe h
m e m be r functions , is Ch aract r()
e
Cl s e s
as Cus t e r ,
om F l
ulEngl h de s cript
is ion, w it t e f t lt e rs
h h irs e t
Savings Account of alw ords capit ize d
l al
Com pil ion unit
at Savings Account av ,
.j a Nam e of cl s / e rf ;if > 1 cl s in f e , pre f d
as int ace as il ixe
fes
il Singlte on.j a
av w it ‘.j
h ava’ t indicat it a s ource code f e .
o e 's il
Com pone nt /
s ok But on , cus t e rL t ,
t om is F l
ulEngl h de s cript
is ion de s cribing us age ;type
w idge ts f e M e nu
il of t e com pone nt concat nat d ont t e e nd.
h e e o h
Contructors Cus t e r() ,
om Us e t e nam e of t e cl s
h h as
Savings Account ()
De structors final ()
ize W ilinv e f
l ok inal () m e m be r f
ize unction be fore
an obj ct is garbage col ct d
e l e
e
Exce ptions e It is ge ne ral acce pt d t us e t e lt e r ‘e ’
ly e o h e t
t re pre s e nt e xce pt
o ions
Final at f l
St ic ie ds M IN_BALANCE , Uppe rcas e lt e rs , w ords s e parat d by unde r-
e t e
/cons t s
ant D EFAUL ATE
T_D s core s . Be t e r: f
t inal t ic ge t e r m e m be r f
s at t unctions
Ge t e r m e m be r
t ge t irs t
F Nam e () , P f t e nam e of t e f l be ing acce s s e d
re ix h h ie d
funct ions ge t arpSpe e d()
W w it ‘ge t
h ’
Int rf s
e ace Runnabl , P
e rom pt r ,
e F l
ulEngl h de s cr. conce pt of int rf , 1s t lt e rs
is e ace e t
Singlt
e on of w ords cap'd. P tf nam e w ith ‘abl,’ ‘ibl,’ or ‘e r’
os ix e e
Local ariabls
v e grandT al cus t e r ,
ot , om F l
ulEngl h de s cript
is ion, 1s t lt e r in l e r
e t ow
ne w Account cas e but do not h ide e xis ting f l / ie l
ie ds f ds
Loop count rs
e i , j, k , count r
e It is ge ne ral acce pt d t us e t e lt e rs i , j
l
y e o h e t
, or k , or t e nam e ‘count r .’
h e
P age
ack ca.uv ic.ne ptune .pe r- Se e Cl s e s - Gl
as obal pack age s : re v rs e nam e
e
s is t nce .m apping
e of Int rne t dom ain & pos t ix t e pack age nam e .
e f h
M e m be r Functions ope nF e () , addAccount
il () F l
ulEngl h de s cript of w h at it doe s s t ing
is ion art
w it act e v rb if pos s ibl, 1s t lt e r in l e r cas e
h iv e e e t ow
Se t e r m e m be r
t s e t as t
L Nam e () , P f t e nam e of t e f l be ing acce s s e d
re ix h h ie d
funct ions s e t arpSpe e d()
W w it ‘s e t
h ’

2. J A D O CUM ENT
AV ATIO N J A CO D ING
AV
Ge ne ralConce pts
CO NV ENTIO NS CO NVENTIO NS
Com m e nt s h oul add t cl y
s d o arit
If it is n’ w ort docum e nt
t h ing,
Rul of t um b : if you’ e ne v r s e e n t e
e h v e h it is n’ w ort running
t h 9 9 .9 % of t e t e it is m ore im port
h im ant
code be f , w h at docum e nt ion w oul
ore at d No de corat ion /banne r-l e com m e nt
ik s t program f your f l
o or e low Your code m us t b e
you ne e d t q uick l unde rs t
o y and it Ke e p com m e nt s im pl
s e de v l rs t an f t e m ach ine
e ope h or h unde rs tandab l t ot e rs
e o h
W rit docum e nt ion b e f
e at ore w rit ing code
W h y ~ not W h at
Jav com m e nt type s
a
D ocum e nt ion Im m e diat l be f
at e y ore de cl ions
arat /** Acce s s or m e m b e r functions Cons ide r us ing l init izat
azy ial ion f f l in t e dat
or ie ds h abas e
of int rf s , cl s e s , m e m be r
e ace as Customer – A customer is any Us e acce s s ors f obt
or aining and m odif ying alf l
lie ds
funct ions and f l t docum e nt
ie ds o person or organization that we
t e m . Th e s e are proce s s e d by
h sell services and products to. Us e acce s s ors f ‘cons t s ”
or ant
j adoc t cre at e xt rnal
av o e e @author S.W. Ambler F col ct
or l ions , add m e m be r f
e unct ions t ins e rt and
o
docum e nt ion f a cl s .
at or as */ re m ov it m s
e e
C St e C-s t e com m e nt t dis abl
yl yl s o e /* W h e ne v r pos s ibl, m ak e acce s s ors prot ct d, not publ
e e e e ic
l s of code t at are no l
ine h onge r Commented out by J.T. Kirk on 1/1/03
appl icabl, but t at you w ant t
e h o replaced by preceding code. Delete Fie l F l s h oul al ays be de cl d priv e
ds ie ds d w are at
k e e p j t in cas e ~ or w h il
us e after 2 years if still not applicable
de bugging. . . . (the source code ) D o not dire ct y acce s s f l , ins t ad us e acce s s or
l ie ds e
*/ m e m be r funct ions
Singl l
e ine Us e s ingl l com m e nt
e ine s // Apply a 5% discount to all D o not us e f inal t ic f l (cons t s ), ins t ad us e
s at ie ds ant e
int rnal w it in m e m be r
e l
y h // invoices over $1000 as defined by acce s s or m e m be r functions
funct ions t docum e nt bus ine s s
o // the Sarek generosity campaign D o not h ide nam e s
logic, code s e ctions and // started in Feb 1995 Al ays init ize s t ic f l
w ial at ie ds
de cl ions of t m porary
arat e
v ariabls .
e
Cl s e s
as M inim ize t e publ and prot ct d int rf s
h ic e e e ace
Argum e nt /param e t rs Th e t
s e ype of t e param e t r
h e De f ine t e publ int rf
h ic e ace f a cl s be f
or as ore you be gin
W h at it s h oul be us e d f
d or coding it
Any re s t ions or pre condit
rict ions D e cl t e f l and m e m be r f
are h ie ds unctions of a cl s in t e
as h
Fie l /
Exam pls
ds prope rt s It de s cript
ie s
e
ion
W H AT t o f l ing orde r:
ol ow
D ocum e nt alappll icabl inv
e ariant s docum e nt · cons t ruct ors
Exam pls e ·f inal ()
ize
Concurre ncy is s ue s
V ibily de cis ions
is it · publ m e m be r f
ic unct ions
Cl s e s Th e purpos e of t e cl s
as h as · prot ct d m e m be r f
e e unct ions
Know n bugs · priv e m e m be r f
at unct ions
Th e de v l e opm e nt m aint nance h is t
/ e ory of t e cl s
h as
D ocum e nt appl icabl inve ariant s · priv e f l
at ie d
Th e concurre ncy s t e gy rat
Com pil ion unit Each cl s / e rf
at s as int ace de f d in t e cl s , incla brie f de s cript
ine h as . ion Local ariab ls
v e D o not h ide nam e s
Th e f e nam e and/ ide nt ying inf
il or if orm at ion
Copyrigh t inf orm at ion D e cl one l
are ocal ariabl pe r l of code
v e ine
Ge t e r m e m b e r f
t unct ion D ocum e nt w h y l init izat
azy ial ion w as us e d, if appl icabl e D ocum e nt local ariabls w it an e ndl com m e nt
v e h ine
Int rf
e ace s Th e purpos e
H ow it s h oul and s h oul t be us e d
d dn’ D e cl l
are ocal ariabls im m e diat l be f
v e e y ore t e ir us e
h
Local ariab ls It us e /
v e s purpos e Us e local ariabls f one t ing onl
v e or h y
M e m b e r Funct ions W h at and w h y t e m e m be r f
h unct ion doe s w h at it doe s
(D ocum e nt ion) W h at a m e m be r f
at unct ion m us t be pas s e d as param e t rs e
W h at a m e m be r f unct ion re t urns Me m be r functions D ocum e nt your code
Know n bugs P aragraph your code
Any e xce pt ions t at a m e m be r f
h unct ion t row s
h Us e w h it s pace , one l be f
e ine ore cont s t
rol ruct s and t o
ure w
V ibily de cis ions
is it Th is t xt is a s um m ary of be f m e m be r f
e
H ow a m e m be r f unct ion ch ange s t e obj ct
h e ore unct ion
Incl ude a h is t ory of any code ch ange s Scot Am b lr's 'W rit
t e ing de cl ions
arat
Exam pls of h ow t inv e t e m e m be r f
e o ok h unct ion if appropriate Rob us t J a Code '
av A m e m be r f unction s h oul be unde rs t
d andabl in ls s t an
e e h
Appl icabl pre condit
e ions and pos t condit ions
D ocum e nt alconcurre ncy
l t irt s e conds
h y
M e m b e r Funct ions Cont s t rol ruct s ure
Th e Am b ySof Inc.
t
W rit s h ort s ingl com m and l s
e , e ine
(Int rnal
e com m e nt ) W h y, as w e las w h at t e code doe s
s l , h Coding St andards f or
Re s trict t e v ibily of a m e m be r f
h is it unction as m uch as
L ocal ariabls
v e J a-v
av 17.01d
D if iculor com plx code
f t e pos s ible
Th e proce s s ing orde r
Pack age Th e rat ional f t e pack age
e or h Th is layout b y M aik e D ul Spe cif t e orde r of ope rat
k y h ions
Th e cl s e s in t e pack age
as h