java - Validating text fields completeness with logical conditions -

i'm coding javafx app, have 6 textfields required fields. have default button innactive @ first.

i want use logic check wether fields have been filled. have variable estado initiated false.

coded:

    if (!((textfield)event.getsource()).gettext().trim().isempty())         estado = estado | true;     else          estado = false;      if (estado)         button.setdisabled(false) 

all textfields got method after keyreleased event.

i've got not results fo far.

this basic solution if need more plz tell...

/*  * change template, choose tools | templates  * , open template in editor.  */ package textfieldlogic;  import java.util.regex.matcher; import java.util.regex.pattern; import javafx.application.application; import javafx.event.eventhandler; import javafx.scene.scene; import javafx.scene.control.textfield; import javafx.scene.input.keyevent; import javafx.scene.layout.stackpane; import javafx.scene.layout.vbox; import javafx.stage.stage;  /**  *  * @author reegan  */ public class textfieldlogic extends application {      @override     public void start(stage primarystage) {         formattedtextfield btn = new formattedtextfield("^[1-9]+$");         btn.settext("only enter numbers");          formattedtextfield btn1 = new formattedtextfield("^[a-z]+$");         btn1.settext("only enter characters");          vbox vbox = new vbox(20);         vbox.getchildren().addall(btn,btn1);          stackpane root = new stackpane();         root.getchildren().add(vbox);          scene scene = new scene(root, 300, 250);          primarystage.settitle("hello world!");         primarystage.setscene(scene);         primarystage.show();     }      /**      * main() method ignored in correctly deployed javafx application.      * main() serves fallback in case application can not      * launched through deployment artifacts, e.g., in ides limited fx      * support. netbeans ignores main().      *      * @param args command line arguments      */     public static void main(string[] args) {         launch(args);     }      public class formattedtextfield extends textfield {      matcher matcher;      public formattedtextfield(string regex) {         pattern pattern = pattern.compile(regex);         matcher = pattern.matcher("");         eventhandler<keyevent> filter = new eventhandler<keyevent>() {             @override             public void handle(keyevent t) {                 string s = gettext() + t.getcharacter();                 matcher.reset(s);                 if (!( matcher.matches() || matcher.hitend())) {                     t.consume();                 }             }         };         addeventfilter(keyevent.key_typed, filter);     }  }  }