java - JComboBox dynamically updating values -
i trying update items of combo box xml nodes, nodes when run loop, somehow not able add them items of combobox
public class xmltoexcelgui extends javax.swing.jframe { public java.io.file file; public xmltoexcelgui() { initcomponents(); } public void setprogressbarvalue(string s){ jprogressbar1.setstring(s); } @suppresswarnings("unchecked") private void initcomponents() { jlabel1 = new javax.swing.jlabel(); jbutton1 = new javax.swing.jbutton(); jlabel2 = new javax.swing.jlabel(); jprogressbar1 = new javax.swing.jprogressbar(); jbutton3 = new javax.swing.jbutton(); jscrollpane1 = new javax.swing.jscrollpane(); jtextpane1 = new javax.swing.jtextpane(); jcombobox1 = new javax.swing.jcombobox(); setdefaultcloseoperation(javax.swing.windowconstants.exit_on_close); jlabel1.settext("xmltoexcel"); jbutton1.settext("choose file"); jbutton1.addactionlistener(new java.awt.event.actionlistener() { public void actionperformed(java.awt.event.actionevent evt) { jbutton1actionperformed(evt); } }); jlabel2.settext("select measures"); jprogressbar1.setstringpainted(true); jbutton3.settext("get measure data"); jscrollpane1.setviewportview(jtextpane1); jcombobox1.setmaximumrowcount(30); jcombobox1.setmodel(new javax.swing.defaultcomboboxmodel(new string[] {})); javax.swing.grouplayout layout = new javax.swing.grouplayout(getcontentpane()); getcontentpane().setlayout(layout); layout.sethorizontalgroup( layout.createparallelgroup(javax.swing.grouplayout.alignment.leading) .addgroup(javax.swing.grouplayout.alignment.trailing, layout.createsequentialgroup() .addcontainergap(137, short.max_value) .addgroup(layout.createparallelgroup(javax.swing.grouplayout.alignment.leading) .addgroup(javax.swing.grouplayout.alignment.trailing, layout.createsequentialgroup() .addcomponent(jlabel1, javax.swing.grouplayout.preferred_size, 97, javax.swing.grouplayout.preferred_size) .addgap(127, 127, 127)) .addgroup(javax.swing.grouplayout.alignment.trailing, layout.createsequentialgroup() .addcomponent(jprogressbar1, javax.swing.grouplayout.preferred_size, javax.swing.grouplayout.default_size, javax.swing.grouplayout.preferred_size) .addgap(117, 117, 117)))) .addgroup(layout.createsequentialgroup() .addgap(18, 18, 18) .addgroup(layout.createparallelgroup(javax.swing.grouplayout.alignment.leading) .addgroup(layout.createsequentialgroup() .addcomponent(jbutton3) .addgap(0, 0, short.max_value)) .addgroup(layout.createsequentialgroup() .addgroup(layout.createparallelgroup(javax.swing.grouplayout.alignment.leading) .addcomponent(jbutton1, javax.swing.grouplayout.preferred_size, 95, javax.swing.grouplayout.preferred_size) .addcomponent(jlabel2, javax.swing.grouplayout.preferred_size, 95, javax.swing.grouplayout.preferred_size)) .addgap(27, 27, 27) .addgroup(layout.createparallelgroup(javax.swing.grouplayout.alignment.leading) .addcomponent(jscrollpane1) .addgroup(layout.createsequentialgroup() .addcomponent(jcombobox1, javax.swing.grouplayout.preferred_size, javax.swing.grouplayout.default_size, javax.swing.grouplayout.preferred_size) .addgap(0, 0, short.max_value))))) .addcontainergap()) ); layout.setverticalgroup( layout.createparallelgroup(javax.swing.grouplayout.alignment.leading) .addgroup(layout.createsequentialgroup() .addcomponent(jlabel1, javax.swing.grouplayout.preferred_size, 46, javax.swing.grouplayout.preferred_size) .addgap(18, 18, 18) .addgroup(layout.createparallelgroup(javax.swing.grouplayout.alignment.leading) .addcomponent(jbutton1) .addcomponent(jscrollpane1, javax.swing.grouplayout.preferred_size, 65, javax.swing.grouplayout.preferred_size)) .addgap(63, 63, 63) .addgroup(layout.createparallelgroup(javax.swing.grouplayout.alignment.baseline) .addcomponent(jlabel2, javax.swing.grouplayout.preferred_size, 22, javax.swing.grouplayout.preferred_size) .addcomponent(jcombobox1, javax.swing.grouplayout.preferred_size, javax.swing.grouplayout.default_size, javax.swing.grouplayout.preferred_size)) .addgap(28, 28, 28) .addcomponent(jbutton3) .addpreferredgap(javax.swing.layoutstyle.componentplacement.related, 26, short.max_value) .addcomponent(jprogressbar1, javax.swing.grouplayout.preferred_size, javax.swing.grouplayout.default_size, javax.swing.grouplayout.preferred_size) .addcontainergap()) ); pack(); }// </editor-fold> private void jbutton1actionperformed(java.awt.event.actionevent evt) { final jfilechooser filedialog = new jfilechooser(); int returnval = filedialog.showopendialog(this); if (returnval == jfilechooser.approve_option) { file = filedialog.getselectedfile(); testvdt call = new testvdt(file); jtextpane1.settext(file.tostring()); } } public static void main(string args[]) { try { (javax.swing.uimanager.lookandfeelinfo info : javax.swing.uimanager.getinstalledlookandfeels()) { if ("nimbus".equals(info.getname())) { javax.swing.uimanager.setlookandfeel(info.getclassname()); break; } } } catch (classnotfoundexception | instantiationexception | illegalaccessexception | javax.swing.unsupportedlookandfeelexception ex) { java.util.logging.logger.getlogger(xmltoexcelgui.class.getname()).log(java.util.logging.level.severe, null, ex); } java.awt.eventqueue.invokelater(new runnable() { public void run() { new xmltoexcelgui().setvisible(true); } }); } public javax.swing.jbutton jbutton1; public javax.swing.jbutton jbutton3; public javax.swing.jcombobox jcombobox1; public javax.swing.jlabel jlabel1; public javax.swing.jlabel jlabel2; public javax.swing.jprogressbar jprogressbar1; public javax.swing.jscrollpane jscrollpane1; public javax.swing.jtextpane jtextpane1; // end of variables declaration } public class testvdt { public int setnumberofmeasures = 0; public string[] measures = new string[30]; public void setmeasurevalues(string s[], int length) { vector comboboxitems = new vector(); (int = 1; < length; i++) { comboboxitems.add(s[i]); // system.out.println(s[i]); } xmltoexcelgui call = new xmltoexcelgui(); defaultcomboboxmodel defaultcomboboxmodel = new defaultcomboboxmodel(comboboxitems); call.jcombobox1.setmodel(defaultcomboboxmodel); } public testvdt(java.io.file fname) { try { file f = new file(fname.tostring()); fileinputstream fis = new fileinputstream(f); byte[] ba = new byte[(int) f.length()]; fis.read(ba); vtdgen vg = new vtdgen(); vg.setdoc(ba); vg.parse(false); vtdnav vn = vg.getnav(); fileoutputstream fout = new fileoutputstream("e:\\data.xls"); hssfworkbook workbook = new hssfworkbook(); hssfsheet worksheet = workbook.createsheet("data"); row row1 = worksheet.createrow(0); row1.createcell(0).setcellvalue("measure_id"); row1.createcell(1).setcellvalue("denominator"); row1.createcell(2).setcellvalue("numerator"); row1.createcell(3).setcellvalue("exclusion"); row1.createcell(4).setcellvalue("performance criteria"); //for(int i=0;i<3;i++) int rowindex = 1; int j = 1; vn.toelement(vtdnav.first_child); { if (vn.matchelement("practice_data")) { vn.toelement(vtdnav.first_child); } if (vn.matchelement("provider_data")) { vn.toelement(vtdnav.first_child); } if (vn.matchelement("provider_identification")) { vn.toelement(vtdnav.first_child); } if (vn.matchelement("measure")) { vn.toelement(vtdnav.first_child); { row row = worksheet.createrow(rowindex++); int cellindex = 0; string temp = vn.tostring(vn.getattrval("measure_id")); system.out.println(temp); measures[j] = temp; row.createcell(cellindex++).setcellvalue(vn.tostring(vn.getattrval("measure_id"))); system.out.print(" -- "); system.out.print(vn.tostring(vn.getattrval("denominator"))); row.createcell(cellindex++).setcellvalue(vn.tostring(vn.getattrval("denominator"))); system.out.print(" -- "); system.out.print(vn.tostring(vn.getattrval("numerator"))); row.createcell(cellindex++).setcellvalue(vn.tostring(vn.getattrval("numerator"))); system.out.print(" -- "); system.out.print(vn.tostring(vn.getattrval("exclusion"))); row.createcell(cellindex++).setcellvalue(vn.tostring(vn.getattrval("exclusion"))); system.out.print(" -- "); system.out.println(vn.tostring(vn.getattrval("performance_rate"))); row.createcell(cellindex++).setcellvalue(vn.tostring(vn.getattrval("performance_rate"))); setnumberofmeasures++; j++; } while (vn.toelement(vtdnav.next_sibling)); } } while (vn.toelement(vtdnav.next_sibling)); system.out.println(setnumberofmeasures); workbook.write(fout); fout.flush(); setmeasurevalues(measures, setnumberofmeasures); } catch (exception e) { system.out.println("exception occurred ==>" + e); } } @suppresswarnings("empty-statement") public static void main(string[] args) { } } by default values of jcombo box blank , when function setmeasurevalues() called should update items of combo box not
your xmltoexcelgui variable, call, local setmeasurevalues(...) method. changes made object refers reflected in local object , not on other object of similar type. guess, perhaps want pass method valid reference displayed xmltoexcelgui object. otherwise if doesn't help, you're going have improve question telling , showing more.
yes, right -- you're setting model of combo box in different non-displayed xmltoexcelgui instance. changing state of 1 instance not , should not have effect on another. solution change state of correct displayed instance.
change this:
private void jbutton1actionperformed(java.awt.event.actionevent evt) { final jfilechooser filedialog = new jfilechooser(); int returnval = filedialog.showopendialog(this); if (returnval == jfilechooser.approve_option) { file = filedialog.getselectedfile(); testvdt call = new testvdt(file); jtextpane1.settext(file.tostring()); } } to this:
private void jbutton1actionperformed(java.awt.event.actionevent evt) { final jfilechooser filedialog = new jfilechooser(); int returnval = filedialog.showopendialog(this); if (returnval == jfilechooser.approve_option) { file = filedialog.getselectedfile(); testvdt call = new testvdt(this, file); // ****** changed jtextpane1.settext(file.tostring()); } and this
public class testvdt { public int setnumberofmeasures = 0; public string[] measures = new string[30]; public testvdt(java.io.file fname) { to like:
public class testvdt { public int setnumberofmeasures = 0; public string[] measures = new string[30]; private xmltoexcelgui gui; public testvdt(xmltoexcelgui gui, java.io.file fname) { this.gui = gui; this way method can use reference actual displayed gui:
public void setmeasurevalues(string s[], int length) { vector comboboxitems = new vector(); (int = 1; < length; i++) { comboboxitems.add(s[i]); } // xmltoexcelgui call = new xmltoexcelgui(); // **** no! defaultcomboboxmodel defaultcomboboxmodel = new defaultcomboboxmodel(comboboxitems); // give xmltoexcelgui public method sets // own combo box's model gui.setcombomodel(defaultcomboboxmodel); }
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