java源程序 对初学者有很大的帮助 从简单到复杂

				//********************************************************************
				//  Dictionary.java       Author: Lewis/Loftus
				//
				//  Represents a dictionary, which is a book. Used to demonstrate
				//  inheritance.
				//********************************************************************
				
				public class Dictionary extends Book
				{
				   private int definitions = 52500;
				
				   //-----------------------------------------------------------------
				   //  Prints a message using both local and inherited values.
				   //-----------------------------------------------------------------
				   public void definitionMessage ()
				   {
				      System.out.println ("Number of definitions: " + definitions);
				
				      System.out.println ("Definitions per page: " + definitions/pages);
				   }
				}