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JAVA Software Development

Paradigm

Advance OO Programming

BSCS Semester 6

MCS 3

Course Instructor: Ms. Iram

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Window Fundamental

7-2

Component

Container 

WindowPanel

Frame Applet

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•  Abstract Windowin !ool"it #AW!$

• Swins

7-3

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Swin %s AW!

•  AW! is &a%a's oriinal set o( classes (or buildin )*Is *ses +eer com+onents o( t,e S ,ea%/wei,t 0ot trul/ +ortable

• 1ue to S's underl/in dis+la/ manaement s/stem

• Swin is desined to sol%e AW!'s +roblems  4a%a li,twei,t com+onents

• 1rawin o( com+onents is done in 4a%a

5a/s out consistentl/ on all Ss *ses AW! e%ent ,andlin

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6-

Swins

• 85AF #8luable 5oo" and Feel$.

• &a%a +ro%ides se%eral 5AFs9 includin: Metal;    +lat(orm inde+endent

Windows;  

 (or Windows Windows Classic;    li"e Windows 95 

Moti(;    (or Unix  < Linux 

 tr/

 =

  *IManaer.set5oo"AndFeel#+la(0ame$

 >

 catc, #?@ce+tion e@$ = ... >

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6-6

)*I Com+onents

• Com+onents are created usin constructors:

•!o be usable9 a com+onent must be added tot,e a++lication's content +ane; or to anot,er

com+onent:

  &5abel uest new &5abel #)uest;$

  &8anel score8anel new &8anel#$  score8anel.add #uest$

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Im+lementin a Swin )*I

• Im+ort 4a%a@.swin.9 4a%a.io.9 4a%a.awt.

• Ma"e a s+eci(ic class to do )*I (unctions

• S+eci(/ all t,e )*I (unctions

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Im+lementin a Swin )*I

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&Frame

• Frames are t,e basis o( an/ &a%a )*I

• Frame is t,e actual window t,at encom+asses /our)*I ob4ects a )*I can ,a%e multi+le (rames

• !,e &; +re(i@ is at t,e beinnin o( an/ Swin

com+onent's name #to distinuis, t,em (rom AW!com+onents$

• &Frame is a wra++er around AW!'s Frame

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Frame

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8anel

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&Scroll8ane

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Swing  com+onents

• Com+onents discussed: &5abel

&Button

&!oleButton &C,ec"Bo@

&ComboBo@

&Slider 

&!e@tField

&8asswordField

&!e@tArea

C,a+ter:  6

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Model-Eiew-Controller 

• 1esin +attern o(ten used in Swin ob4ects

• Brea"s a )*I ob4ect down into t,ree +arts

Model; manaes t,e data used b/ t,e ob4ect Eiew; manaes t,e ra+,ical

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Model-Eiew-Controller 

• Swin com+onents t,at use t,e MEC +attern9

suc, as &5ist and &!able9 enerall/ ,a%e one

class t,at controls bot, t,e %iew and t,e

controller and a se+arate class t,at controlst,e model

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Model-Eiew-Controller 

• 8rorammer instantiates a model #e..9 t,e1e(ault!ableModel class$9 t,en loads t,at model wit, t,edata to be dis+la/ed in t,e )*I

&!able table new &!able#1e(ault!ableModel model$

• I( t,e +rorammer instantiates t,e )*I ob4ect wit,out amodel9 t,e %iew

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5a/out Manaers• ?%er/ +anel ,as a la/out manaer 

• 5a/out manaers tell &a%a w,ere to +ut com+onents w,en/ou add t,em to a +ane

• awt

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6-

1e(ault 5a/outs

• ?ac, com+onent ,as a de(ault la/out

manaer9 w,ic, remains in e((ect until t,e

com+onent's set5a/out met,od is called.

• !,e de(aults are:Content +ane Border5a/out

&8anel Flow5a/out

Bo@ Bo@5a/out

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6-

Flow5a/out

  Container c etContent8ane#$

  c.set5a/out#new FlowLayout()$

  c.add #new &Button #Bac" to Start$$

  c.add #new &Button #8re%ious Slide$$

  c.add #new &Button #0e@t Slide$$  c.add #new &Button #5ast Slide$$

  c.add #new &Button #?@it$$

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6-2G

Bo@5a/out

• In a ,oriHontal bo@9 com+onents are +laced

,oriHontall/9 le(t to ri,t.

• In a %ertical bo@9 com+onents are +laced

%erticall/9 to+ to bottom.

oriHontal; or%ertical; ,as

not,in to do wit,

t,e s,a+e o( t,e

bo@ itsel(.

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6-2

Bo@5a/out #cont'd$

• Bo@5a/out is t,e de(ault la/out (or a Bo@ 

container.

  Bo@ bo@ Bo!create"ori#ontalBo()

  bo@. add #...$

 

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Bo@5a/out #cont'd$

  Container c etContent8ane#$

  c.set5a/out#new Flow5a/out#$$

  Bo &o ' Bo!createVerticalBo()

  &o!add #new &Button #0e@t Slide$$

  &o!add #new &Button #8re%ious Slide$$

  &o!add #Bo@.createEerticalStrut #2G$ $  &o!add #new &Button #?@it$$

  c.add #&o$

 Adds e@tra

%ertical s+ace

betweencom+onents

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)rid5a/out

• S+lits t,e +anel into a rid wit, i%en

numbers o( rows and columns.

• 8laces com+onents into t,e rid cells.

• Forces t,e siHe o( eac, com+onent to occu+/t,e w,ole cell.

•  Allows additional s+acin between cells.

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6-2J

)rid5a/out #cont'd$

  Container c etContent8ane#$

  c.set5a/out #new ridLayout(* +* ,%* +% )$

  c.add #new &Button #Bac" to Start$$

  c.add #new &Button #8re%ious Slide$$

  c.add #new &Button #0e@t Slide$$

  c.add #new &Button #5ast Slide$$  c.add #new &Button #?@it$$

?@tra s+acebetween t,e

cells #in +i@els$

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6-2

Border5a/out

• 1i%ides t,e area into (i%e reions and adds a

com+onent to t,e s+eci(ied reion.

• Forces t,e siHe o( eac, com+onent to occu+/t,e w,ole reion.

0D!

S*!

C?0!?D ?AS!W?S!

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6 26

Border5a/out #cont'd$

  Container c etContent8ane#$

  c.set5a/out#new BorderLayout()$