'How to return value from lambda expression? (JavaFx- ChoiceBox addListener) [closed]

choiceBox.getSelectionModel().selectedItemProperty().addListener( (v, oldValue, newValue) -> {selectedColor = newValue.toString();});

System.out.println(selectedColor);

I want to pass the newValue to selectedColor but outside the lambda it's not printing anything.

javajavafxlambda


Solution 1:[1]

Unless you provide more details on what you want to accomplish i can only guess what would help you. But the following code would make your example work the way you describe it:

choiceBox.getSelectionModel().selectedItemProperty().addListener((v,oldValue,newValue) -> {
printSelection(newValue.toString());
});


private void printSelection(String selection){
    System.out.println(selection);
    //Here you can do what ever you need to do with the given value of 'selection'
}

For a better solution you need to provide more Details on what your goal is, what you want to use the newValue for

Sources

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Source: Stack Overflow

Solution Source
Solution 1 sxeros

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