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按钮。但我不知道如何编写基于变量值的方法选择。 Google没有提供有用的有用信息。任何人都可以帮忙解决这个问题,或者这是不可能的吗?
以下是一些代码示例:
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**
答案 0 :(得分:1)
使用HashMap:
Map<String, Runnable> actions2methods = new HashMap<>;
actions2methods.put("Action1", new Runnable { public void run() { testAction1(); }));
如果你的行动从一开始就是Runnable
而不是方法,你甚至可以让这更容易。
答案 1 :(得分:0)
您可以使用actionCommand
的{{1}}属性来传达采取的操作。这默认为按钮的标签,但也可以使用ActionEvent
设置(不影响标签)。
Button.setActionCommand()
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