java - Syntax error (missing operator) in query expression 'Nombreproductos ==' some product ' -

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i have code:

try{          class.forname("sun.jdbc.odbc.jdbcodbcdriver");         string db = "jdbc:odbc:driver=microsoft access driver (*.mdb);dbq=productosh.mdb";         connection con = drivermanager.getconnection(db, "", "");         statement s = con.createstatement();         resultset hola = s.executequery("select precioventau productos nombreproductos == '"+jcombobox1.getselecteditem()+"'");         while (hola.next()){             double preciou = hola.getdouble("precioventau");             system.out.println(preciou);             jtextfield5.settext(string.valueof(preciou));         }       } catch(classnotfoundexception | sqlexception e){         joptionpane.showmessagedialog(null, e);         e.printstacktrace();     }

supossed set in textfield result of query. raise exception can't figure how solve it.

java.sql.sqlexception: [microsoft] [odbc microsoft access driver] syntax error (missing operator) in query expression 'nombreproductos ==' product '

but nombreproductos field in table productos.

when comparing strings in sql can use '=' or keyword like

resultset hola = s.executequery("select precioventau productos nombreproductos = '"+jcombobox1.getselecteditem()+"'"); while (hola.next()){  resultset hola = s.executequery("select precioventau productos nombreproductos '"+jcombobox1.getselecteditem()+"'"); while (hola.next()){

the difference between '=' , like '=' must same match. 'like' able use wildcards.


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