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);     }  }  }

Comments

Post a Comment

Popular posts from this blog

c# - Unity IoC Lifetime per HttpRequest for UserStore -

-
i'm trying clean default implementation of accountcontroller.cs comes out of box in new mvc5/owin security implementation. have modified constructor this: private usermanager<applicationuser> usermanager; public accountcontroller(usermanager<applicationuser> usermanager) { this.usermanager = usermanager; } also, have created lifetime manager unity looks this: public class httpcontextlifetimemanager<t> : lifetimemanager, idisposable { private httpcontextbase _context = null; public httpcontextlifetimemanager() { _context = new httpcontextwrapper(httpcontext.current); } public httpcontextlifetimemanager(httpcontextbase context) { if (context == null) throw new argumentnullexception("context"); _context = context; } public void dispose() { this.removevalue(); } public override object get...
Read more

Change the color of an oval at click in Java AWT -

-
i have draw ovals in java, , @ click change color. beginning tried change color after 20 ms, doesn't work. my code is: public class mycomponentnew extends frame { public graphics2d g2d; public mycomponentnew(string title) { super(title); setsize(400, 550); } @override public void paint(graphics g) { this.g2d = (graphics2d) g; this.g2d.setcolor(color.red); this.g2d.filloval(10, 55, 50, 100); } public void changecolor () { this.g2d.setcolor(color.blue); this.g2d.filloval(10, 55, 50, 100); } } and in class main method have: mycomponentnew m; m = new mycomponentnew("fereastra cu baloane"); m.setvisible(true); m.addwindowlistener(new windowadapter() { @override public void windowclosing(windowevent we) { system.exit(0); } }); try { thread.sleep(20); } catch(interruptedexception e) {} m.changecolor(); the color of oval remains red. ...
Read more

I am trying to solve the error message 'incompatible ranks 0 and 1 in assignment' in a fortran 95 program. -

-
i writing program in fortran find velocity of parachuting person in relation time. keep getting error can't fix. new programming , appreciated. the error is v(i+1)=v(i)+[32-((c*v(i)*v(i))/m)]*(h) 1 error: incompatible ranks 0 , 1 in assignment @ (1) and program is program para integer :: real :: v(11) !velocity real :: q !initial velocity real :: h !time step real :: c !drag coefficient real :: m !mass ! gravity equal 32 ft/s^2 write (*,*)'enter time step' read(*,*)h write(*,*)'enter initial velocity' read(*,*)q write(*,*)'enter drag coefficient' read(*,*)c write(*,*)'enter mass' read(*,*)m i=1,10 ! 1 10, 1 being interval. end v(i+1)=v(i)+[32-((c*v(i)*v(i))/m)]*(h) q=v(1) end program you cannot use [] normal parenthesis in expressions. array constructor, [ items ] means array items elements. end do should after line.
Read more