主要介绍了如何使用JAVA创建一个类，并输出Hello pudn字符。适合初学者学习使用。如类声明为public型时类名必须与文件名一样等。-introduces how to use Java to create a category, and the output Hello pudn characters. For beginners to learn how to use. If such a statement for public - when class with the same name, and other documents.