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java事物跟踪系统.可以便于大家更明了事物机制,仅供大家消遣学习.(Java things tracking system. Can facilitate everyone know more things mechanism, we only recreation study.)

java的通讯录,有查找联系人，添加联系人，显示联系人，保存联系人等功能(contact management system)

this is set by subclasses, but don t make it public.

分段直线拟合，将一组点 分段拟合计算出最小权值和画出线条(Piecewise linear fitting, fitting a set of points to calculate the minimum weight sub-values ​ ​ and draw lines )

A Project For Net Beans In Java !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

说明：  jacob的一个例子，可以替换word表中的任意一个地方或是word中的表格（多行多列）(jacob an example, you can replace any word in the table or a place in the word form (multi-line multi-column))

编写一个线段类 MyLine，要求如下: 主要属性有： x ，y ；类型为Point (查看API) 编写构造方法，如 MyLine(Point p1 , Point p2) 编写5个成员方法。如： 检查线段是否位于第一象限check()… 求线段的长度 length() … 判断两条直线是否相交(另一线段作为参数)。 编写一点到该线段（或延长线）的距离 其他方法。 注：编写方法时，考虑利用Point类的方法 编写测试程序 (Write a segment class MyLine, requirements are as follows: The main attributes are: x, y type Point (see API) the preparation of construction methods, such as MyLine (Point p1, Point p2) prepared by five members of the method. Such as: Check whether the line segment in the first quadrant check () ... order to segment the length of the length () ... to determine whether the two straight lines intersect (the other segment as a parameter). The preparation of 1:00 to the line segment (or extension) of the distance from other methods. Note: The preparation method, consider using the Point class approach to preparing test program)

Multiplayer game using java

模拟EMS—UI的操作，十分不错，请学习(Simulate the operation of EMS-UI, very good, please study)

可以用的计算器，功能非常全面，可以当做大作业用(Calculator can be used, the function is very comprehensive, can be used as a big homework.)