java - Using a value to fire Jcombobox actionlistener instead of getselectedindex? -

-

here jcombobox has 2 items name , id 

   public void comboitem() {  chooser.removeallitems(); chooser.additem("please select..."); try {              string sql="select * patients_details";          pst = conn.preparestatement(sql);          rs=pst.executequery();          while (rs.next()) {             string id = rs.getstring("patient_id"); // id             string name = rs.getstring("name"); // name               comboitem comboitem = new comboitem(id, name); // create new comboitem             chooser.additem(comboitem); // put combobox             string tmp=comboitem.getid();         }       } catch (sqlexception sqle) {         system.out.println(sqle);     }

jcombobox actionlistener code

private void chooserpopupmenuwillbecomeinvisible(javax.swing.event.popupmenuevent evt) {                                                          object selectedvalue = chooser.getselectedindex();      try{         string sql="select * patients_details patient_id=? ";       pst=conn.preparestatement(sql);       pst.setobject(1, selectedvalue);       rs=pst.executequery();       if(rs.next()){        string add1=rs.getstring("patient_id");       txtpatientid.settext(add1);       string add2=rs.getstring("name");       txtname.settext(add2);       string add3=rs.getstring("age");       txtage.settext(add3);       string add4=rs.getstring("gender");       txtgender.settext(add4);       string add7=rs.getstring("date");       txtdate.settext(add7);         }    }    catch(exception e) {     joptionpane.showmessagedialog(null,e );    } }

my question is: how can use id value fire jcombobox listener instead of getselectedindex appreciated.

use getselecteditem() obtain reference selected comboitem, , it's id; use getselectedindex() obtain it's index.

because setselectedindex() fires combo's actionlistener, navigational controls such ⊲prev , next⊳ buttons can delegate combo, shown here:

  • obtain index getselectedindex().

  • increment or decrement index.

  • perform range check on index.

  • delegate selection combo via setselectedindex(index).

a particular implementation of comboboxmodel, such defaultcomboboxmodel, can searched using iteration:

for (int = 0; < dcbm.getsize(); i++) {     comboitem item = (comboitem) dcbm.getelementat(i);     // check item }

Comments

Post a Comment

Popular posts from this blog

Perl - how to grep a block of text from a file -

-
it can in xml or text format. how in general grep block of text in perl? <track type="ws"> <range> <rangestart>0</rangestart> <rangeend>146.912</rangeend> <locationindex>0</locationindex> <propertyindex>0</propertyindex> </range> </track> <track type="ps" id="1"> <range> <rangestart>0</rangestart> <rangeend>146.912</rangeend> <locationindex>1</locationindex> <propertyindex>1</propertyindex> </range> </track> i want grep type="ps" , till </range> . one solution open file, read line line , match block. open(fh, "file.txt"); foreach $line (<fh>) { if ($line =~ m/type="cc"(.*?)<\/range>/) { print $1; } } but there more optimal solution without reading file line l
Read more

delphi - How to remove all the grips on a coolbar if I have several coolbands? -

-
Image
if set mycoolbar.fixedorder true,only grip on first band hidden. well,if use delphi 7 create vcl forms application,then put coolbar on , create 3 coolbans hold other controls,only grip , top coolbands can hidden setting mycoolbar.fixedorder:=true. i've uploaded picture make things clear. you got fixedorder property wrong. fixed property not allow bands rearranged if set true . setting property of coolbar true keep user changing bands order @ runtime, user can still move , resize bands. can give advice can do, actual solution problem, well, have wait answer. my advice use 3 coolbars in row , setting "fixedorder" property true , bandborderstyle bsnone . way grip hidden on of them. about property, it's not bug of ide, actual preference of property.
Read more

javascript - Animating array of divs; only the final element is modified -

-
this baffling me @ moment. i'm experienced programmer looking throw bit of surprise fiancee on countdown page our wedding. desired effect simulated confetti falling behind main page. setup follows: i have array of divs in javascript. each div absolutely positioned on page. have interval set updates every 50 or milliseconds. on each tick, run loop on array of divs, , calculations , update positions. problem problem having, however, though can see divs created, stored array, , modified (in case, each has slight randomized rotation) during initialization phase, once tick update position starts, div stored in whatever last slot of array gets position updated. tried hard-coding each div index testing purposes, strictly last element update position. upon printing current "left" , "top" style values each div before , after calculations shows value has been changed, no visible change noticeable. here's basic code: javascript var container;
Read more