How to convert an observable list to an array list? Java

问题

I'm trying to get all the items in a table view and place them in an array list for further processing. This is what I'm trying to achieve but obviously it won't work.

ArrayList<Consultation> showing = consultationTable.getItems();

回答1:

Nice and recommended solution:

List<Consultation> showing = provider.getItems();

Solution to use only if necessary:

    List<Consultation> consultations = provider.getItems();
    ArrayList<Consultation> showing;
    if (consultations instanceof ArrayList<?>) {
        showing = (ArrayList<Consultation>) consultations;
    } else {
        showing = new ArrayList<>(consultations);
    }

If for some reason you need to use an ArrayList method that is not in the List or ObservableList interface (I cannot readily think of why), you may use the latter.

回答2:

A simple method using Stream class

List<T> list = ObservableList<T>.stream().collect(Collectors.toList());

回答3:

// To convert an observable list to an array of strings given the following observable list:

// Create these in the class 
ListView<String> myListView = new ListView<>();
ObservableList<String> myList;

// Then define them in the start class myList = FXCollections.observableArrayList(someGivenArray); myListView.setItems(myList);

// Make an array to store list items in the observable list as strings
List<String> myArray = new ArrayList<String>();

// Loop through the observable list and load the string array
    for (int i =0; i<myList.size(); i++){
       myArray.add(myList.get(i));
    }
// Test by printing out to the screen or a text field
    System.out.println(myList.get(0));
    myTextField.setText(myList.get(0));

来源：https://stackoverflow.com/questions/39872697/how-to-convert-an-observable-list-to-an-array-list-java

标签

java

javafx