java编程思想第3版作者自己写的工具包

				//: com:bruceeckel:util:CharGenerator.java
				// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
				// www.BruceEckel.com. See copyright notice in CopyRight.txt.
				package com.bruceeckel.util;
				public interface CharGenerator { char next(); } ///:~