java - How can I put Jbuttons into arraylist with considering their name? -


i have code , want put buttons in page in arraylist considering name if name example btn_2 should second element of list. gives error , says cannot cast field jbutton since list type jbutton not field.his not code of them code consist of ading panel adding button panel labels.

getcontentpane().setforeground(color.dark_gray); getcontentpane().setlocation(-405, -87); setresizable(false); setdefaultcloseoperation(jframe.exit_on_close); getcontentpane().setlayout(null);  panelpod1 = new jpanel(); panelpod1.setbounds(65, 13, 353, 313); panelpod1.setborder(new bevelborder(bevelborder.raised, color.dark_gray, null, null, null)); getcontentpane().add(panelpod1); panelpod1.setlayout(null);  jpanel panel = new jpanel(); panel.setborder(new softbevelborder(bevelborder.lowered, color.dark_gray, null, null, null)); panel.setbounds(10, 11, 59, 59); panelpod1.add(panel); panel.setlayout(null);  btn_1 = new jbutton(); btn_1.settext(""); btn_1.setenabled(false); btn_1.setborder(new roundedborder()); btn_1.setbounds(17, 15, 26, 24); panel.add(btn_1);  btn_3 = new jbutton(""); btn_3.setenabled(false); btn_3.setforeground(systemcolor.textinactivetext); btn_3.setbackground(systemcolor.activecaption); btn_3.setbounds(10, 15, 26, 24); btn_3.setborder(new roundedborder()); panel1.add(btn_3); panel.setlayout(null);  btn_5 = new jbutton(""); btn_5.setenabled(false); btn_5.setbounds(11, 15, 26, 24); btn_5.setborder(new roundedborder()); panel_1.add(btn_5);  btn_2 = new jbutton(""); btn_2.setenabled(false); btn_2.setbounds(12, 15, 26, 24); btn_2.setborder(new roundedborder()); panel_2.add(btn_2);  btn_4 = new jbutton(""); btn_4.setenabled(false); btn_4.setbounds(11, 15, 26, 24); btn_4.setborder(new roundedborder()); panel_3.add(btn_4);   jpanel panel_4 = new jpanel(); panel_4.setborder(new bevelborder(bevelborder.lowered, null, null, null, null)); panel_4.setbounds(10, 81, 59, 59); panelpod1.add(panel_4); panel_4.setlayout(null);  btn_6 = new jbutton(""); btn_6.setenabled(false); btn_6.setbounds(10, 15, 26, 24); btn_6.setborder(new roundedborder()); panel_4.add(btn_6);   integer search_index=0; java.lang.reflect.field[] fields; integer arrayindex=0; arraylist<jbutton> rockets; boolean allfound=false; while (!allfound) {    (int =0;i<fields.length;i++)    {       if(fields[i].getname().equals("btn"+arrayindex.tostring()))          {            rockets.add(arrayindex,fields[i]);       }        if (arrayindex==50)       {           allfound = true;       }   } }

like else here, highly doubt whether should approach problem way, if insist, works:

final int number_of_buttons = 50; final string prefix = "btn_"; field[] fields = getclass().getdeclaredfields(); jbutton[] rockets = new jbutton[number_of_buttons];  (field field : fields) {                             if(field.getname().startswith(prefix)) {         int index = integer.parseint(field.getname().substring(prefix.length())) - 1;         rockets[index] = (jbutton) field.get(this);     }            }

i assumed first button called btn_1, hence -1 index.


Comments

Post a Comment

Popular posts from this blog

monitor web browser programmatically in Android? -

i've got tricky question here. need users make payment bank (namely barclaycard) in uk. so, have https url , add parameters (such amount pay, order reference, etc) url, start http connection intent.actionview, redirect user browser can enter credit card details on bank's webpage , make payment our account successfully. far ? the code use below (i changed values privacy reasons) problem is, need app when user has completed/failed/cancelled payment. barclaycardautomatically redirects particular url when payment has succeeded, 1 if failed. there no way of knowing when barclaycard payment has succeeded go android app somehow ? button cardbutton = (button) findviewbyid(r.id.card_button); cardbutton.setonclicklistener(new view.onclicklistener() { @override public void onclick(view arg0) { string prehashstring = new string(); string prohashstring = new string(); string shapassphrase = new string(); shapassphrase = "gsvth£h70zkh...
Read more

Shrink a YouTube video to responsive width -

i have youtube video embedded on our website , when shrink screen tablet or phone sizes stops shrinking @ around 560px in width. standard youtube videos or there can add code make go smaller? you can make youtube videos responsive css. wrap iframe in div class of "videowrapper" , apply following styles: .videowrapper { float: none; clear: both; width: 100%; position: relative; padding-bottom: 56.25%; padding-top: 25px; height: 0; } .videowrapper iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; } the .videowrapper div should inside responsive element. padding on .videowrapper necessary keep video collapsing. may have tweak numbers depending upon layout.
Read more

wpf - PdfWriter.GetInstance throws System.NullReferenceException -

i'm trying create pdf document using itextsharp 5.3.4 using following document document = new document(); filestream stm = new filestream(filename, filemode.create); pdfwriter writer = pdfwriter.getinstance(document, stm); i'm getting system.nullreferenceexception following stack trace: system.nullreferenceexception occurred hresult=-2147467261 message=la référence d'objet n'est pas définie à une instance d'un objet. source=itextsharp stacktrace: à itextsharp.text.version.getinstance() innerexception: i've verified neither document nor stm null, , if select "continue" in vs12 document created - exception thrown. updated itextsharp 5.4.0 , it's still occurring. can't find information on anywhere - got ideas? make sure not catching exceptions. nullreferenceexception can 1 caught , handled inside itextsharp, don't care it. fact can continue supports theory. change following setting verify: debug -> exceptions ...
Read more