javafx给按钮加命令模式-Go服务器开发

在JavaFX中，可以使用Lambda表达式和命令模式来实现给按钮添加功能。下面是一个示例代码：

首先定义一个接口Command，该接口包含了要执行的操作：

public interface Command {
    void execute();
}

然后创建两个类：OpenFileCommand和SaveFileCommand，分别表示打开文件和保存文件的操作。

public class OpenFileCommand implements Command {
    private FileChooser fileChooser;
    private Stage primaryStage;

    public OpenFileCommand(Stage primaryStage) {
        this.primaryStage = primaryStage;
        fileChooser = new FileChooser();
        fileChooser.setTitle("Open Resource File");
        fileChooser.getExtensionFilters().addAll(
                new ExtensionFilter("Text Files", "*.txt"),
                new ExtensionFilter("Image Files", "*.png", "*.jpg", "*.gif"),
                new ExtensionFilter("Audio Files", "*.wav", "*.mp3", "*.aac"));
    }

    @Override
    public void execute() {
        File selectedFile = fileChooser.showOpenDialog(primaryStage);
        if (selectedFile != null) {
            System.out.println(selectedFile.getAbsolutePath());
        }
    }
}

public class SaveFileCommand implements Command {
    private Stage primaryStage;

    public SaveFileCommand(Stage primaryStage) {
        this.primaryStage = primaryStage;
    }

    @Override
    public void execute() {
        FileChooser fileChooser = new FileChooser();
        fileChooser.setTitle("Save Resource File");
        fileChooser.getExtensionFilters().addAll(
                new ExtensionFilter("Text Files", "*.txt"),
                new ExtensionFilter("Image Files", "*.png", "*.jpg", "*.gif"),
                new ExtensionFilter("Audio Files", "*.wav", "*.mp3", "*.aac"));
        File selectedFile = fileChooser.showSaveDialog(primaryStage);
        if (selectedFile != null) {
            System.out.println(selectedFile.getAbsolutePath());
        }
    }
}

接下来，我们创建一个带有两个按钮的UI，一个用于打开文件，另一个用于保存文件。当用户单击按钮时，将执行相应的操作。

”`java public class Main extends Application {

@Override
public void start(Stage primaryStage) throws Exception{
    Command openCommand = new OpenFileCommand(primaryStage);
    Command saveCommand = new SaveFileCommand(primaryStage);

    Button openButton = new Button("Open File");
    openButton.setOnAction(event -> openCommand.execute());

    Button saveButton = new Button("Save File");
    saveButton.setOnAction(event -> save