读者应能知道GUI（图形用户界面）的概念，并且能够使用Java语言来构建一个令人赏心悦目的GUI界面，使你的程序更具有感召力。掌握标签、按钮、文本框、选择框、滚动条……等等各种GUI部件的使用方法。-Readers should be able to know the GUI (Graphical User Interface) concept, and can use the Java language to build a pleasing GUI interface to make your program more appeal. Master labels, buttons, text boxes, select boxes, scroll bars ... ... and so the use of a variety of GUI components.