java - 我如何摆脱这些(未检查的调用)警告？

Question

warning: [unchecked] unchecked call to setCellValueFactory(Callback<CellDataFeatures<S,T>,ObservableValue<T>>) as a member of the raw type TableColumn column1.setCellValueFactory(new PropertyValueFactory<String, State>("name"));   where S,T are type-variables:
    S extends Object declared in class TableColumn
    T extends Object declared in class TableColumn

代码:

column1.setCellValueFactory(new PropertyValueFactory<>("name"));

---

warning: [unchecked] unchecked call to add(E) as a member of the raw type List
            transitionTable.getColumns().add(column1);
  where E is a type-variable:
    E extends Object declared in interface List

代码:

transitionTable.getColumns().add(column1);

---

warning: [unchecked] unchecked call to setAll(Collection<? extends E>) as a member of the raw type ObservableList
        automatonSelection.getItems().setAll(automatonManager.getMachines());
  where E is a type-variable:
    E extends Object declared in interface ObservableList

代码:

automatonSelection.getItems().setAll(automatonManager.getMachines());

automatonSelection 是一个 ComboBox，getMachines() 返回一个 Automaton 类型的 LinkedList

---

warning: [unchecked] unchecked call to addListener(ChangeListener<? super T>) as a member of the raw type ObservableValue
        automatonSelection.valueProperty().addListener((ObservableValue observable,
  where T is a type-variable:
    T extends Object declared in interface ObservableValue

代码:

automatonSelection.valueProperty().addListener((ObservableValue observable,
            Object oldValue, Object newValue) -> {
        stateChanged();
    });

我试图修复其中的大部分警告并通过添加泛型设法做到了这一点，但我看不出如何修复其他 4 个警告。

Answer 1

不要将您的 TableView 和 TableColumn 声明为原始类型。

换句话说，而不是

TableView personTable ;
TableColumn firstNameColumn ;

使用

TableView<Person> personTable ;
TableColumn<Person, String> firstNameColumn ;

等等

不要抑制这些警告，它们会帮助您调试问题。