java - Problems loading data into combobox -

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public void muestraregistro(jtextfield t1 ,jtextfield t2 , jtextfield t3 , jtextfield t4 , jtextfield t5,jtextfield t6 , jcombobox cmb) {     try {          int row = productogui.tbldetalle.getselectedrow();           string muestra = productogui.tbldetalle.getmodel().getvalueat(row, 0).tostring();         //string muestra = productogui.tbldetalle.getvalueat(productogui.tbldetalle.getselectedrow(), 0).tostring();         rs = cargaregistro();         while (rs.next()) {                                  t1.settext(rs.getstring(1));                 t2.settext(rs.getstring(2));                                                      cmb.setselecteditem(rs.getstring(3));                 system.out.print(cmb);                 t3.settext(rs.getstring(4));                 t4.settext(rs.getstring(5));                 t5.settext(rs.getstring(6));                 t6.settext(rs.getstring(7));              habilitatexto(false, t2, t3, t4, t5, t6);         }     } catch (sqlexception | headlessexception ex) {                      joptionpane.showmessagedialog(null,ex);         logger.getlogger(productodao.class.getname()).log(level.severe, null, ex);     } }

i have code, have trouble throws me following message when loading data combobox jtable

javax.swing.jcombobox[,113,91,200x18,layout=com.sun.java.swing.plaf.windows.windowscomboboxui$3,alignmentx=0.0,alignmenty=0.0,border=,flags=328,maximumsize=,minimumsize=,preferredsize=,iseditable=false,lightweightpopupenabled=true,maximumrowcount=8,selecteditemreminder=1]javax.swing.jcombobox[,113,91,200x18,layout=com.sun.java.swing.plaf.windows.windowscomboboxui$3,alignmentx=0.0,alignmenty=0.0,border=,flags=328,maximumsize=,minimumsize=,preferredsize=,iseditable=false,lightweightpopupenabled=true,maximumrowcount=8,selecteditemreminder=1]javax.swing.jcombobox[,113,91,200x18,layout=com.sun.java.swing.plaf.windows.windowscomboboxui$3,alignmentx=0.0,alignmenty=0.0,border=,flags=328,maximumsize=,minimumsize=,preferredsize=,iseditable=false,lightweightpopupenabled=true,maximumrowcount=8,selecteditemreminder=1]

this simple example shows combo box combo box model containing 3 strings. println prints string cmb.getselectedindex(): 1 on laptop (which corresponds second string in model).

final jcombobox<string> cmb = new jcombobox<>(new string[]{"123", "456", "789"}); cmb.setselecteditem("456"); system.out.println("cmb.getselectedindex(): " + cmb.getselectedindex());

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