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Just a simple counter

3.设计一个能够描述点（point）、线(line)、圆（circle）、矩形（rectangle）和三角形（triangle）等几何形状的类体系，能够计算不同形状的周长和面积（如果能够定义的话）。程序文件命名为Exe3_3.java。(3. Design a point can be described (point), line (line), circle (circle), class hierarchy rectangle (rectangle) and the triangle (triangle) and other geometric shapes, different shapes can calculate perimeter and area (if you can define if). Program file named Exe3_3.java.)

这实一个求最短路径的实验，对初学者很有用，特别实学习　数据结构的同学(This is a shortest path experiment, very useful for beginners, in particular data structure is learning students)

自己利用java实现的股票K线图，模拟股票一天内的走势，利用了jfreechart(Java implementation of the stock chart)

2222Java2 参考大全(第4版).pdf，是一本很好的电子书，对JAVA 2做了很好的解释，并有事例来说明，(2222Java2 Reference (4th edition). Pdf, is a very good e-books, on the JAVA 2 make a very good explanation, and have examples to illustrate)

Java程序设计语言经典教程，从理解Java设计思想的层面上来学习Java编程。(Java programming language classic handbook, from the level of understanding of the design ideas come to learn Java Java programming.)

cours to programme by using java

说明：  这是手机的射击游戏,有一定的参考价值,可编译(shooting games, a certain reference value, compiler)

吃货系统。点菜查看菜单，结账，点赞评论等各种功能(Eating system. Ordering menu, checkout, comment and other functions)

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