消除不同類別中的重複代碼

Question

在兩個不同的類中，我具有相同的代碼，如下所示。這部分代碼使我能夠在用戶關閉窗口時添加一個警報屏幕。避免兩次寫同一個東西的最好方法是什麼？

public void addWindowEventHandlers() { 
    view.getScene().getWindow().setOnCloseRequest(new EventHandler<WindowEvent>() { 
     @Override 
     public void handle(WindowEvent event) { 
      Alert alert = new Alert(Alert.AlertType.CONFIRMATION); 
      alert.setHeaderText("You are about to exit the game."); 
      alert.setContentText("Are you sure?"); 
      alert.setTitle("Warning"); 
      alert.getButtonTypes().clear(); 
      ButtonType no = new ButtonType("No"); 
      ButtonType yes = new ButtonType("Yes"); 
      alert.getButtonTypes().addAll(no, yes); 
      alert.showAndWait(); 
      if (alert.getResult() == null || alert.getResult().equals(no)) { 
       event.consume(); 
      } 
     } 
    }); 
} 

小提示：對於這個項目，我必須使用模型視圖主持人。

Answer 1

爲什麼不只是使處理一個獨立的類（或公共靜態內部類中其他一些方便類）：

public class CloseWindowConfirmation implements EventHandler<WindowEvent>() { 
    @Override 
    public void handle(WindowEvent event) { 
     Alert alert = new Alert(Alert.AlertType.CONFIRMATION); 
     alert.setHeaderText("You are about to exit the game."); 
     alert.setContentText("Are you sure?"); 
     alert.setTitle("Warning"); 
     alert.getButtonTypes().clear(); 
     ButtonType no = new ButtonType("No"); 
     ButtonType yes = new ButtonType("Yes"); 
     alert.getButtonTypes().addAll(no, yes); 
     alert.showAndWait(); 
     if (alert.getResult() == null || alert.getResult().equals(no)) { 
      event.consume(); 
     } 
    } 
} 

然後你只需做

public void addWindowEventHandlers() { 
    view.getScene().getWindow().setOnCloseRequest(new CloseWindowConfirmation()); 
}