CODEWITHSUNDEEP
javafxcombobox
Alyona
Alyona

Reputation: 1792

How to get item index from ComboBox?

I have ObservableList<Fruits> fruits. Each fruit object has name and value parameters. Objects are: {"apples", 22}, {"oranges", 3} and {"pears", 5}. I added those items to ComboBox: 

fruitComboBox.setItems(fruits);

How can I get item index from this ComboBox based on object's name? For example get index of "oranges" object?

I need to get index of item, so that I can use:

fruitComboBox.getSelectionModel.select(index);

full code will look like:

fruitComboBox.setItems(fruits);

fruitFactory = lv -> new ListCell<Fruits>){
     @Override
     protected void updateItem(Fruits fruit, boolean empty) {
        super.updateItem(fruit, empty);
        setText(empty ? "" : fruit.getName + ": " + fruit.getValue);
     }
};

fruitComboBox.setCellFactory(fruitFactory);
fruitComboBox.setButtonCell(fruitFactory.call(null));

For different people I need to select by default different fruits. I tried using:

fruitComboBox.getSelectionModel().select(orangeObject);

But it showed not formatted object in ButtonCell, also it didn't have any selection in open ComboBox. Using index gave perfect results:

fruitComboBox.getSelectionModel().select(2);

The only problem is, I don't know how I can get index of item in the ComboBox based on one of its parameters.

Upvotes: 1

Views: 9825

Answers (2)

James_D
James_D

Reputation: 209339

Why not just do:

for (Fruit fruit : fruitComboBox.getItems()) {
    if ("oranges".equals(fruit.getName())) {
        fruitComboBox.getSelectionModel().select(fruit);
        break ;
    }
}

or, if you prefer a stream-based solution

fruitComboBox.getItems().stream()
    .filter(fruit -> "oranges".equals(fruit.getName()))
    .findAny()
    .ifPresent(fruitComboBox.getSelectionModel()::select);

Upvotes: 0

vikrant verma
vikrant verma

Reputation: 159

well to simply get the index of selected item in a combobox you can use .getselectedindex() method of combobox

Upvotes: 1

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