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 a