一个经典的单例模式demo（模拟打印机）

这是我自己做练习的文件，希望可以给初学者一些帮助-This is my own practice document wish to give some help for beginners

串的基本操作 主要是对串的比较,求串长等-The basic operation of the main string of string comparison, and long strings

分享Swing学习的一些经验 ，入门之后的书籍推荐如下。-share Swing learning experience, the entry after the books are recommended.

j2me游戏按键控制-J2ME game control buttons

Swing组件演示-Swing components demo

面板、菜单、工具栏

此程序为java查找文档,统计给定文件中包含的每个单词出现的频率，并按单词表的顺序显示统计结果-procedure for java find documents, statistics given document contains the words of each frequency, together with a word list in the order shown results

url的信息例子-url examples of information

基于Jsp的学生信息管理系统 很好用，外加mySQL数据库-Jsp-based student information management system is useful, plus a mySQL database

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