我试图在Kotlin的TableView上使用MapValueFactory.我在Java中找到了一个https://jenkov.com/tutorials/javafx/tableview.html岁的好例子

以下Java代码运行良好:

package com.example.tableview;

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.MapValueFactory;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class HelloApplication extends Application {
    @Override
    public void start(Stage stage) throws IOException {

        var tableView = new TableView();

        TableColumn<Map, String> firstNameColumn = new TableColumn<>("firstName");
        firstNameColumn.setCellValueFactory(new MapValueFactory<>("firstName"));

        TableColumn<Map, String> lastNameColumn = new TableColumn<>("lastName");
        lastNameColumn.setCellValueFactory(new MapValueFactory<>("lastName"));

        tableView.getColumns().add(firstNameColumn);
        tableView.getColumns().add(lastNameColumn);

        ObservableList<Map<String, Object>> items = FXCollections.<Map<String, Object>>observableArrayList();

        Map<String, Object> item1 = new HashMap<>();
        item1.put("firstName", "Randall");
        item1.put("lastName" , "Kovic");

        items.add(item1);

        Map<String, Object> item2 = new HashMap<>();
        item2.put("firstName", "Irmelin");
        item2.put("lastName" , "Satoshi");

        items.add(item2);

        tableView.getItems().addAll(items);
        Scene scene = new Scene(tableView, 320, 240);
        stage.setTitle("Hello!");
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch();
    }
}

当我将代码剪切并粘贴到IntelliJ中的Kotlin项目中时，它会try 自动将Java转换为Kotlin.但是，生成的代码不会编译.它表示，试图将firstNameColumn添加到tableView时存在类型不匹配.柱.

Type mismatch.
Required: Nothing!
Found: TableColumn<Map<*, *>, String>

以下是生成的未编译Kotlin代码:

package com.example.tableview

import javafx.application.Application
import javafx.collections.FXCollections
import javafx.scene.Scene
import javafx.scene.control.TableColumn
import javafx.scene.control.TableView
import javafx.scene.control.cell.MapValueFactory
import javafx.stage.Stage

class HelloApplication : Application() {

    override fun start(stage: Stage) {

        val tableView: TableView<*> = TableView<Any?>()

        val firstNameColumn = TableColumn<Map<*, *>, String>("firstName")
        firstNameColumn.setCellValueFactory(MapValueFactory("firstName"))

        val lastNameColumn = TableColumn<Map<*, *>, String>("lastName")
        lastNameColumn.setCellValueFactory(MapValueFactory("lastName"))

        tableView.columns.add(firstNameColumn)
        tableView.columns.add(lastNameColumn)

        val items = FXCollections.observableArrayList<Map<String, Any>>()

        val item1: MutableMap<String, Any> = HashMap()
        item1["firstName"] = "Randall"
        item1["lastName"] = "Kovic"

        items.add(item1)

        val item2: MutableMap<String, Any> = HashMap()
        item2["firstName"] = "Irmelin"
        item2["lastName"] = "Satoshi"

        items.add(item2)

        tableView.items.addAll(items)
        val scene = Scene(tableView, 320.0, 240.0)
        stage.title = "Hello!"
        stage.scene = scene
        stage.show()

    }

    fun main() {
        Application.launch(HelloApplication::class.java)
    }
}

任何帮助都将不胜感激.我在这件事上做了好几次调查，试图找出正确的类型...