这是一个applet小程序，实现对一段字符的字母逐个显示的并循环的功能-repaint the char

画图板的java小程序，网上也有很多的例子，这个例子比较简单，好理解，充分理解repaint的作用-The Java applet to the drawing board, the Internet there are many examples, this example is relatively simple, easy to understand, to fully understand the role of the repaint