Javafx concatenation of multiple StringProperty - string

Question

Is there a simple way to bind a concatenation of StringProperty objects?
Here is what I want to do:
TextField t1 = new TextField();
TextField t2 = new TextField();
StringProperty s1 = new SimpleStringProperty();
Stringproperty s2 = new SimpleStringProperty();
Stringproperty s3 = new SimpleStringProperty();
s1.bind( t1.textProperty() ); // Binds the text of t1
s2.bind( t2.textProperty() ); // Binds the text of t2
// What I want to do, theoretically :
s3.bind( s1.getValue() + " <some Text> " + s2.getValue() );
How can I do that?

Answer 1

You can do:
s3.bind(Bindings.concat(s1, " <some Text> ", s2));
Here's a complete example:
import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public class BindingsConcatTest extends Application {
#Override
public void start(Stage primaryStage) {
TextField tf1 = new TextField();
TextField tf2 = new TextField();
Label label = new Label();
label.textProperty().bind(Bindings.concat(tf1.textProperty(), " : ", tf2.textProperty()));
VBox root = new VBox(5, tf1, tf2, label);
Scene scene = new Scene(root, 250, 150);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}