lecture 1 ie

8/10/2019 Lecture 1 IE

1/55

1

Advanced ProgrammingMethodsLecture 1


2/55

2

GradingLaboratory:--50%

- Assignments at each lab about 10 lab assigments! -- "5%- #irst Practical $est &am at LA'5 1 hour( o)en boo*!: -- 5%

- +econd Practical $est &am at LA'11 or LA'12 or LA'1" 2hours( o)en boo*!: --10%

#inal e&am: -- 50%

- ,ritten &am about 1 hour( closed boo*s!: --20%

- Practical &am about hours( one )roblem in .ava( one)roblem in / ( o)en boo*s!: --"0%

+eminar:

- your contribution ill be ta*en into account or the rounding othe inal mar*


3/55

"

3ules - you have to )resent each assignment at its deadline

- each ee* o the assignment delay means -1)oints rom thatassigment mar*

- i you delay an assignment more than ee*s you ill get thegrade 1 or it

- i you ill not come to a lab )ractical e&am you ill get 1 or thate&am

- in order to get into the inal e&am your average grade or the labactivities assigments 4 2 lab )ractical tests! must be at least 5

- in order to )ass the inal e&am you must have at least 5 at theinal ritten e&am and at least 5 at the inal )ractical e&am such

that the inal grade must be at least 5

- you can )ass either both the inal ritten e&am and the inal)ractical e&am or nothing


4/55

3ules or the second e&amrestanta6!

- in order to )ass the inal second e&am you must have at least 5

at the inal ritten e&am and at least 5 at the inal )ractical e&am

- you can )ass either both the second inal ritten e&am and the

second inal )ractical e&am or nothing - at the second e&am restanta6 you can )resent or re-)resent

ma&imum 5 lab assigments in order to im)rove your labactivities mar*


5/55

5

/ourse in ormation

htt):77 8cs8ubbclu98ro7 craciun 7MetodeAvansate;ePr ogramare7


6/55

=

Lectures >vervie>b9ect-oriented languages:

- .ava

- /

Lecture 1 and Lecture 2 Lab 1( Lab2( and +em1!:.ava basics

Lecture " and Lecture Lab "( Lab ( and +em2!:/ basics

A ter lectures and labs! :

- )ractical e&am at the lab( you ill be able torite sim)le >> )rograms in .ava and /


7/55


8/55

.ava $echnology


9/55

.ava language

@ariables;eclaration:

type name_var1[=expr1][, name_var2[=expr2]];

Primitive ;ata $y)es

$y)e r8 byte @alues ;e ault value

boolean - true( alse alse

byte 1 -12B C 412? byte!0

short 2 -2 15 C2 15-1 short!0

int -2 "1 C2 "1 -1 0

long B -2 =" C2 =" -1 0L

loat < ?5 080

double B < ?5 080d

char 2 Dnicode 0( Dnicode 2 1=-1 EFu0000 null!


10/55

.ava Language

&am)les: boolean gasit=true;

int numar=34, suma;float eroare=0 4!;"#ar litera=$"%;litera=$f%;litera=litera&1;


11/55

.ava /omments 18 '' entire line

28 '( multiple lines ('"8 '(( use) by )o"umentation *ava)o" tool

multiplelines('

>bs: /omments canot be nested into strings8

'( '((' (' + - ./

'( '' ''

(' .//


12/55

.ava /onstants

final type name [=value];

&am)les:a! final int =100;

b! final int ;

=100;C

=1!0; ''error


13/55

Array Array ith one dimension

type[] name; type name[];

Array allocation:array_name=ne type[)im]; ''memory allo"ation

''in)ex 0 )im 1 Accessing an array element: arrayHname [in)ex]

&am)les:

float[] ve";

ve"=ne float[10];

int[] sir=ne int[3];float tmp[];tmp=ve"; ''ve" an) tmp refer to t#e same array


14/55

>ne dimension Array

Built-in length : returns the array dimension8int[] sir=ne int[!];

int lung_sir=sir lengt#; ''lung=!;sir[0]=sir lengt#;sir lengt#=2; ''error

int[] y;int lung_y= y lengt#; ''error, y as not "reate)

)ouble[] t=ne )ouble[0];int lung_t=t lengt#; ''lung_t=0;t[0]=2 3 ''error5 in)ex out of boun)s

t#e s#ort"ut syntax to "reate an) initiali6e an array5int[] )x=7 1,0, 18;


15/55

3ectangular multidimensional array

;eclaration:type name[][][][];

type[][][][] name;

/reation:

name=ne type[)im 1][)im 2][)im n]; Accessing an element:

name[in)ex 1][in)ex 2][in)ex n];

&am)les:

int[][] a;a=ne int[!][!];a[0][0]=2;int x=a[2][2]; ''x=9


16/55

on-3ectangular Multidimensional Array

&am)les:int[][] a=ne int[3][];for:int i=0;i 3;i&&ab"?;s=s&?123?; ''"on"atenating stringsAtring t=s; ''t=>ab"123?t&=>12?; ''t=9, s=9

+tring content can not be changed: t[0]=$ %; "#ar "=t "#ar t:0


18/55

>)eratorsarihtmetic: &, , (, ', F

relational: E, E=, , =, /=, ==increment7decrement: &&,

prefix5 int a=2;int b=&&a; ''a=2, b=2

postfix5 int a=2;

int b=a&&; ''a=3, b=2assignment: =, &=, =, (=, '=conditional: GG, HH, /

bit ise 5 shi t EE, , EEE,- conditional G, H, I :not


19/55

>)erator )recedence>)erators Precedence higher )recedence on to)( the same )recedence on the same line!

18 Post i& expr&& expr

28 Dnari &&expr expr &expr expr I /

"8 ( ' F

8 &

58 EE EEE =8 E = E= instan"eof

?8 == /=

B8 G

K8 J

108 H

118 GG

128 HH

1"8 9 5

1 8 = &= = (= '= F= G= J= H= = EE= EEE=


20/55

+tatements+eJuential /om)osition:

7 instr1;

instr2; 8

/onditional:

if :logi"a_expr


21/55

Loo) +tatements,hile statement:

#ile:logi"al_expr3 statement:

for:initiali6ation;termination; stepbs: none o the initiali6ation, termination, step are mandatory

int suma=0for:int i=1;i 10;i&&< suma&=i;

for:int i=0,suma=0;i 10;i&&)erator ne 5

Xun"t p=ne Xun"t:


41/55

;e ining methods[ ] "lass Dlass+ame7 [a""ess_mo)ifier] Cesult_-ype met#o)+ame:[list_formal_param]


42/55


43/55

>verloading methods A class may contain multi)le methods ith the same name but ith di erent signature8

A signature O return ty)e and the list o the ormal )arameters

publi" "lass Domplex7 private )ouble real, imag; '' "onstru"tors publi" voi) a)una :)ouble real


44/55

.ava does not allo the o)erators overloading8/lass +tring has overloaded o)erators & and &=8Atring s=Uab"U;

Atring t=UMZ U; Atring r=s&t; s&=23; s&=\ \; s&=4 !;

''s=>ab"23 4 !?;''r=>ab"MZ ?

;estructor:


45/55

>b9ects as Parameters>b9ects can be ormal )arameters or the methods

A method can return an ob9ect or an array o ob9ects8 publi" "lass Cational7 private int numarator, numitor;

''Donstru"tors

publi" voi) a)una:Cational r


46/55

Passing argumentsPrimitive ty)e arguments boolean( int( byte( long( double! are )assed by value8 $heir

values are co)ied on the stac*8 Arguments o re erence ty)e are )assed by value8 A re erence to them is co)ied on thestac*( but their content ields or ob9ects( locations or array! can be modi ied i themethod has the rights to accces them8

18 $here is not any ay to change the )assing mode li*e Q in /44!8

"lass Xarametrii7 stati" voi) inters"#imba:int x, int y


47/55

Passing arguments"lass S7

int val; publi" S:int x


48/55

Passing arguments"lass S7

int val; publi" S:int x


49/55

Array o ob9ectsach array element must be allocated and intialiIed8

publi" "lass -ablouri bie"te 7 stati" voi) generea6a:int nrMlem, Domplex[] t


50/55

Array o ob9ects stati" Domplex suma:Domplex[] t


51/55

$he methods to+tring and eJuals

publi" "lass Domplex7 private )ouble real, imag; publi" Domplex:)ouble re, )ouble im


52/55

+tatic methods


53/55

+tatic methods$hey are called using the class name :

Domplex a,b;'' initiali6ation a an) b

Domplex "=Domplex a)una:a, b


54/55

+tatic ields

publi" "lass +atural7 private long val;

publi" stati" long =232 ''2JN3 1 ''8

publi" "lass Xro)us 7 private stati" long "ounter; private final long i)="ounter&&;

publi" Atring toAtring:


55/55

+tatic ields

lecture 1 ie

Documents