如果使用哈希图，则使用JavaFX_TableView_How填充特定单元格的颜色

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class HashChartExample extends Application {

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

    @Override
    public void start(Stage primaryStage) {
        TableView<DataItem> tableView = new TableView<>();
        TableColumn<DataItem, String> nameColumn = new TableColumn<>("Name");
        nameColumn.setCellValueFactory(new PropertyValueFactory<>("name"));

        TableColumn<DataItem, Integer> valueColumn = new TableColumn<>("Value");
        valueColumn.setCellValueFactory(new PropertyValueFactory<>("value"));

        valueColumn.setCellFactory(column -> {
            return new TableCell<DataItem, Integer>() {
                @Override
                protected void updateItem(Integer item, boolean empty) {
                    super.updateItem(item, empty);

                    if (item == null || empty) {
                        setText(null);
                        setStyle("");
                    } else {
                        setText(item.toString());

                        // 根据特定条件设置单元格的背景颜色
                        if (item < 50) {
                            setBackground(Color.RED);
                        } else if (item < 100) {
                            setBackground(Color.YELLOW);
                        } else {
                            setBackground(Color.GREEN);
                        }
                    }
                }

                private void setBackground(Color color) {
                    String hex = String.format("#%02X%02X%02X",
                            (int) (color.getRed() * 255),
                            (int) (color.getGreen() * 255),
                            (int) (color.getBlue() * 255));
                    setStyle("-fx-background-color: " + hex);
                }
            };
        });

        tableView.getColumns().addAll(nameColumn, valueColumn);

        // 添加示例数据
        tableView.getItems().add(new DataItem("Item 1", 80));
        tableView.getItems().add(new DataItem("Item 2", 30));
        tableView.getItems().add(new DataItem("Item 3", 120));

        StackPane root = new StackPane(tableView);
        Scene scene = new Scene(root, 400, 300);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static class DataItem {
        private String name;
        private int value;

        public DataItem(String name, int value) {
            this.name = name;
            this.value = value;
        }

        public String getName() {
            return name;
        }

        public int getValue() {
            return value;
        }
    }
}