如何打开两个Javafx窗口?

Ara*_*ash 2 javafx launch application-error

我正在使用javafx,想在一个按钮的'setOnAction'中编写代码来关闭javafx1类和运行javafx2类,但我看到错误'应用程序启动不能多次调用'.我怎样才能解决这个问题?

//This code is in the class JavaFX1:
button.setOnAction(new EventHandler<ActionEvent>() {
      @Override
      public void handle(ActionEvent event) {
          JavaFX2.main(null); //How can i change current line?
          stage.close();
      }
});
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xue*_*eng 13

它是这样完成的:

        @Override
        public void handle(ActionEvent event) {
            System.out.println("Hello World!");

            Stage secondStage = new Stage();
            secondStage.setScene(new Scene(new HBox(4, new Label("Second window"))));
            secondStage.show();

        }
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您还可以设置新窗口的坐标和大小.