JavaFX all component in loop

Question

I want cut my code in fxml.

fx1.textProperty().addListener((observable, oldValue, newValue)->{
    doThis();
});
fx2.textProperty().addListener((observable, oldValue, newValue)->{
    doThis();
});
fx3.textProperty().addListener((observable, oldValue, newValue)->{
    doThis();
});
fx4.textProperty().addListener((observable, oldValue, newValue)->{
    doThis();
});
fx5.textProperty().addListener((observable, oldValue, newValue)->{
    doThis();
});

I want loop in this component. Any suggestions?

James_D · Accepted Answer · 2017-11-20 14:10:09Z

3

If this is an all-Java application (or if these controls are created in Java), you can simply create them in a loop and register the listener when you create them:

for (int i=0 ; i < 5 ; i++) {
    TextField fx = new TextField();
    fx.textProperty().addListener((obs, oldText, newText) -> doThis());
    somePane.getChildren().add(fx);
}

If these are FXML-injected, they need their own identity. The shortest code is probably to create a stream:

Stream.of(fx1, fx2, fx3, fx4, fx5)
    .map(TextField::textProperty)
    .forEach(text -> text.addListener((obs, oldText, newText) -> doThis()));

Also see adding elements defined in FXML to list with loop

edited Nov 20, 2017 at 14:10

answered Nov 20, 2017 at 12:27

James_D

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