java小程序计数器--仅供参考一起学习

1、pac k age c om haha;impor t java awt .Col o r;im p o r t java awt event Mou s eAdap ter; imp o r t j ava awt eve nt. M o u s eEvent; imp o rt java a wt. e ve n t Mou s eList e n e r；im p ort jav a x .swing J Bu t ton； import j a v a x swing JFrame;import j a vax.swing J Pan e 1；import ja v ax s wing

2、 JT e x tFiel d :p ub 1 ic cla s s J i S uanQ i extends Mous e Ad a p t er imp lemen t s Mo u s e L istene r o p ub 1 ic S t r i n g numl=M M , n um生 ” M ,op r=M nzres = H M;o p ub 1 ic Bo o 1 e an is 0 p r=f a Ise;/opub 1 i c Boo lean i s D i a n 1 =fa 1 se;p ub 1 ic Bool e an isDian2 = f alse;publ

3、ic JT ext F iel d j f=new JT e xt F ield ("O'1)： opu b li c J P a ne 1 jpl=new JPa nel();public JFrame f;opublic JButton c =new JB u tton("c ”)；/XY空按pu b 1 ic J B utt o n d=new J Butt o n (" M ) ; /删除public JB u tton b= ne w JButton (H7") zne w JButto n (" 8 ") z ne

4、 w JBu tton (n9") r new JBut ton ( '* +H ) ,onew J B u tton ( * 4" ) r n ew J B utton ( M 5H ) z n ew JBu t ton ( H6”),new JB u t ton ( M -H) ,o o n e w J Button ( H 1n) z new JBu t ton ( " 2lf) > n ew JBut t on (lf3n )> n ew J Bu t ton (""),o new J B u t t on (M0n

5、) znew JB u tton ("")/ new J Butt o n (,=,'), n ew JButton ( '* /“)： /声明并初始化按钮数组，存放数字和操作符J i S uanQi () oin it Frame ():publi c void in i tF r am e () /绘制屏幕of=new JFrame ("计算器");o o f s e t B o unds ( 6 0 0,2 0 0,250z 350 )：&f set Defaul t Cl o s eO p erat i on (JFram

6、e EXIT ON C L OSE)； /关闭 窗口_o f s etResizable(false): o f se t Visi b 1 e (true);of. setLay out ( null);f a d d (j f )：o j f s et E dita b le (false);j f set Bo un ds(0, 0,250,5 0)；o o jf .setBac k ground (C o I or. re d);obut t o nPos();oad d B utt o nL i st e n er ();o p u b li c void b uttonPo s (

7、) /添力【I按钮o i n t x=15/y=100：o of add ( c );o oc .setBo unds (1 8 0z 55，5 0 , 4 0 );of add ( d )：o d.SGtBou n d s ( 1 20f 5 5/ 55,40);fo r (i n t i=0; i <4; i + + ) o for(int j =0;j<4： j+) “of. add (b i j );bi j setB o un ds (xz yz 50, 40);oox+=55：0 0 3)o o X = 1 5 ；o oy+=42：pub lie vo id addB

8、utt o n Lis tenG r () /事件注册o c addMouseLi s te n er (n e w MouseAdapt e r () o & ©p ubl i c void mous e Clicked (Mouse E v e nt e) ooe v e ct Do (e);o & )；od a d dMo u s eLi s t e n e r (new M o useAdapt e r () p ubl i c v o id mous e Click e d ( MouseEve nt e ) o e v e ct Do ( e )；0 0

9、0 )：o f or (int i=0; i<4： i + + ) o o f or (int j =0； j<4： j+ + )o o o b i j add Mou s e Liste n e r (new Mouse Ada p t e r () o o p ublic vo i d mouseClicked (MouseEven t e) evec t Do ( e )；o0 0 )：0 0 3)o p ubl i c voi d e vectDo (MouseEvent e) / / 事件处理程序/o oif (e get Source () = = d) o o i f

10、 (isOpr) o o i f (!num2 .e q ua 1 s (11H) ) onum2=n u m2 s ubs t r i n g (0z n u m2 length () -1);0 0 0 o oelseo opr=,IH;oisO p r = f al s e；0 0 0 0 oelseo i f (!numl.equals("") ) on u ml=n u ml substr i n g (0z n uml le ngt h () -1);0 0 oel s eonuml=HH;0 0 0 0 d i sp ()：if ( e . g e ts o

11、urce ( ) =c) j f setText ( " 0 ”)；onnml = "u： niim2=HH;opr=Hn;r e s = M"oisDian 1 =false;o o i s D i an 2 = f als e ; isOpr=fals e;0 )if (e g e tSo u rce () =b 0 3 ) / / 力10 0 0o oopr=b 0 3 . get Te x t ()；o is Opr= true；o/isDian 1 = f a I s e：o odisp ();0 i f (e.getSour c e () = = b

12、1 3 ) / / 0戒o opr=b1 3 g etText():o a isOpr=t r ue：o o d d i s p ();ooif (e .getSou r ce () =b 2 3 ) /乘o oo p r=b 2 3getTe x t ()： ois O p r =true：di s p ();&o if (e gets o urce () =b 3 3) /除0 0o o o pr= b 3 3 g e tTe x t(); oisOpr= t rue;o d i s p ()：0 0 oi f (e getSou r ce () =b 3 2 ) / /等号ooi

13、f (numl. in d e xOf (" ”)=-l&&num2 ind e x O f ( " . ”) =- 1 )o d j isua n Int ();0 0 D oe Is e o o ji s u anFloat ():0 0 ooif (! (numl. inde x Of (H. n) =-l) / / /小数点o oisDi a n 1 = t rue：0 0 o ois I) ian 2 =fa 1 se;oif (e g e tSource () =b 0 0 ) /勃U仪数'Foooif(lisOpr) o onum 1

14、+=b 0 0 .get T ext ();0 0 oe Ise o & num 2 += b 0 0 g e t Text ()；0 o o odis p ()：0 0 o oif (e .getSource () =b 0 1 ) / /获取数字0 & doi f (! is Opr) ooo n uml+=b 0 1g e tText ();e 1 se o on um2 +=b 0 1 ge t Te x t ();0 0 0 0d i S p ()：0 oif (e.g e tSource () = b 0 2 ) /获取数字i f (!is Opr) o o num

15、l + =b 0 2 g etT e xt ();0 0 o a else oooonum 2 +=b 0 2 ge t T e xt ()：o d isp ();0 0 0oif (e g etS o urc e () =b 1 0 ) 0o i f (!isOpr) o o n uml + =b 1 0 ge t Tex t ():0 0 oels e o on um2+=b 1 0ge t T e x t ();»di s p ()：b oif (e g et S o u rce () =b 1 1)0 0o o oif ( ! i s Opr) o o d o n uml +

16、 = b 1 1 getText ():0 0 oe 1 s e oon u m2+=bl l.ge t Text ();0 0 o odis p ();b o i f (e g etSourc e () = b 1 2) oi f (! isOpr) o o n uml+=b 1 2 g e tText ();else o o onum2 + = b 1 2ge t Text ();o © d d i s p ();J0 &if (e ge t Sourc e ( ) =b 2 O)o o if (! isOpr) onuml+= b2 0getText (/获取数字/获取

17、数字/ /获取数字/获取数字o o else o onum2+=b 2 Oge t Text ():o od i sp ();o if (g g e tS o u r ce () =b 2 1 ) / / 获取数字0 0o o ©if(! i s Opr)o on u m 1 +=b 2 1 g e t Text ();0o e 1 se o o on u m 2 +=b 2 1 getTex t ();0disp ();D o i f (e .g e tSo u r c e () =b2 2) /获取数字0o o i f (!isOpr)o numl += b 2 2 get T

18、e xt ()；0 0 o o e 1 s e o & n u m2+=b 2 2 getT e xt ();o0disp ();oo oif ( e .get S ource () =b 3 0) / / 获取数70 0i f (! i sOpr)o ormml+=b 3 0 getT e xt ();0o oe 1 se on um2 +=b3 0 .getTe x t ();0 0 o a odisp ()；0 0 o i f (e .ge t Sourc e () =b 3 1 ) / 获取数？oif ( ! is O p r) o if ( ! isDia n 1 ) o o

19、num 1 +=b 3 1 get Text ();o o o oisDian 1 = t rue；0 0 0 0 0 o & o eIse oif ( ! i sDian 2 ) o o n um2+= b 3 1 g e tTe x t ();0 0 5 o o oisDia n 2 = t ru e ;0 di s p ()；0 o p ublic void di sp ()/ / III / / / /显示结果o j f s et T ext (n uml+ o pr+ n um2);»publ icvoi d ji suan I n t () /川算整数o i nt

20、 nlr n 2 ;0 i f (numl G quals (") ) o o ©nl=0;0 0 o els e nl=Int e g e r p a r s e I nt (num 1 )：i f (num2 e q uals ("")o o on2= 0 ;0 0 o e 1 seo on2= I nt e ge r . p arselnt (num2);0 o i f (o p r e quals ("+") 0res= (n 1 +n2)+H M ；j f s e t T ext (res);numl= res;num2=H

21、 ,f;o p r =Mu：o isOp r =f a Ise;° o if (op r .equ a Is)0r e S=(nl-n2)+'fn；o o d jf setT e xt (res);o num 1 =r e s;o o num2=",f;oop r=Hn;i s Opr=false;if ( opr .equals (n* ” ) 0 0 r e s= (nl * n 2) +;o o o jf.se tTex t ( res);onuml=res;0num2="H;oop r ="n；oi s Opr=fal s e ;0oif

22、 (opr e q u als ("/”)oowhile (tr u e) oif(n2=0)j f.setTextC被除数不能为零“)；00 num 1 = H;num2=u H ;op r=,t,r； re s =M H ;o a o i sOpr=false;0 0 00 0 e 1 s e 0 0 re s = ( ( ( f 1 oa t) n l)/n2) +H M ;o o j f set Tex t ( r e s );onum 1 =res;o on um2=M M;oop r ="u;oisOpr=fals e ;0o o break;o & a

23、 public v oid j i s u a n Flo a t () / / / / / / / !/计算浮点数float n1 n 2;o int nn=Math abs (node Num (n u m 1 ) +no d e N u m ( n um 2 );oif (numl .equ a 1 s (" n) o &1 =0;0 0 o else o on 1 =Float pa rs e Float ( n uml);& if (num2 e q ual s (”)o on 2 = 0 ;0 el s en2=Fl o at p ars e F 1 o a t (num 2 )： if (opr equ a Is (n+ " ) ) r e s= (nl+n2)+ ” M ;ojf se t Tex t (re s );onuml=res：0num2=,H;oopr = H 11 :o o is 0 p r = fa Ise;0 0 o oif (op r e q ua 1 s) 0 0 0 r es= (nl-n2) + M H;o o jf s etT e xt( res)