编写一个英语单词拼写训练应用程序，先设计好英语单词拼写训练应用程序窗口与组件，再为按钮添加事件处理及添加键盘上的“—>”、“<—”键的事件处理方法-Write an English word spelling training application, the first design is good training for English words spelled with the components of the application window, and then add an event handler for the button and add the keys on the keyboard event handling methods " -> " ," < -"