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我正在编写用户的 GUI，我想创建一个方法，该方法将创建具有先前定义的名称和操作的各种数量的按钮。但我不知道如何编写基于变量值的方法选择。谷歌没有提供任何有用的信息。任何人都可以帮助解决这个问题，或者这是不可能的？

这是一些代码示例：

    String[] actions={"testAction1","testAction2","testAction3"};
    defaultDialogWindow(actions,"test1", "test2", "test3");

    void defaultDialogWindow(String[] actions, String... bNames){
          double layoutX = 25;
          double spacing = 15;
          final Stage dialogStage = new Stage();
          dialogStage.initOwner(stage);
          dialogStage.initModality(Modality.WINDOW_MODAL);   
          dialogStage.setFullScreen(false);
          dialogStage.setResizable(false);
          dialogStage.setHeight(100);
          dialogStage.setWidth(bNames.length*100+(bNames.length-1)*spacing+2*layoutX+5);
          dialogStage.setScene(new Scene(buttonBuilder(actions,spacing,layoutX,bNames)));
          dialogStage.show();  
    }

    HBox buttonBuilder(String[] actions, double spacing,double layoutX,String... bNames){
          HBox lBar = new HBox(10);
          final ReadOnlyDoubleProperty menuWidthProperty = lBar.widthProperty();
          lBar.setAlignment(Pos.CENTER_LEFT);
          lBar.setLayoutX(layoutX);
          lBar.setSpacing(spacing);
          for(String text : bNames){
              Button newButton = new Button();
              newButton.setText(text);
              newButton.setFont(Font.font("Times New Roman", 22));
              newButton.prefWidthProperty().set(100);
              newButton.prefHeightProperty().set(50);
              newButton.setOnAction(new EventHandler<ActionEvent>() {
                  @Override
                  public void handle(ActionEvent paramT) {

                      **HERE MUST BE ACTION CALL BASED ON bNames VALUE**

                      System.out.println("button pressed");
                  }
              });
              lBar.getChildren().add(newButton);
          }
          System.out.println(lBar.prefWidth(-1));
          return lBar;
      }

      void testAction1(){
          System.out.println("this is test action one");
      }

      void testAction2(){
          System.out.println("this is test action two");
      }

      void testAction3(){
          System.out.println("this is test action three");
      }**strong text**
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2 回答 2

1

使用哈希映射：

Map<String, Runnable> actions2methods = new HashMap<>;
actions2methods.put("Action1", new Runnable { public void run() { testAction1(); }));

如果您的操作Runnable从一开始就不是方法，您甚至可以使这更容易。

于 2012-08-25T21:02:19.870 回答
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您可以使用 的actionCommand属性ActionEvent来传达已采取的操作。这默认为按钮的标签，但也可以使用设置（不影响标签）Button.setActionCommand()。

 newButton.setOnAction(new EventHandler<ActionEvent>() {
     @Override
     public void handle(ActionEvent paramT) {
         String actionCmd = paramT.getActionCommand();
         if (actionCmd.equals("A")) {
             doA();
         } else if (actionCmd.equals("B")) {
             doB();
         }
         System.out.println("button pressed");
     }
 });

http://docs.oracle.com/javase/6/docs/api/java/awt/Button.html#setActionCommand%28java.lang.String%29

http://docs.oracle.com/javase/6/docs/api/java/awt/event/ActionEvent.html

于 2012-08-25T20:39:27.910 回答