编写一个Applet程序，使用五个基本组件对象（例如：按钮（Button）、文本域（TextField）、标签（Label））建立一个GUI界面。要求：（a）至少包含一个按钮组件对象；（b）编程实现通过点击按钮，完成GUI界面在流式布局管理器（FlowLayout），栅格布局管理器（GridLayout）和边界布局管理器（BorderLayout）三种布局样式之间的切换。

-Write an Applet, use the five basic components of an object (for example: button (Button), the text field (TextField), label (Label)) to create a GUI interface. Requirements: (a) contain at least one button on the Component Object　(b) the programming by clicking on the button to complete the GUI interface in the flow layout manager (FlowLayout), the grid layout manager (GridLayout with) and a border layout manager (the BorderLayout ) three switch between the layout style.