J48决策树算法的源代码

应用背景即时聊天工具，包括服务端和客户端，网络通信之通过HTTP协议实现，java编程语言实现，简洁易懂，涉及技术比较全面，适合新手学习......关键技术即时聊天工具，包括服务端和客户端。 java编程

JAVA-INFORMATION

piweurrrrq i o fhsadhfka fd dskajc zxkjcnkjsahc

Java JMF System will automatically delete the directory of debug and release, so please do not put files on these two directory.

基于TCP的文件传输。（没有连接数据库，只是实现了简单的server端和client端的文件传输）

android game The name "Gomoku" is from the Japanese language, in which it is referred to as gomokunarabe . Go means five, moku is a counter word for pieces and narabe means line-up. The game is also popular in Korea, where it is called omok which has the same structure and origin as the Japanese name. It is said to have originated in China with the name Wu Zi Qi . In the nineteenth century, the game was introduced to Britain where it was known as Go Bang, said to be a corruption of the Japanese word goban, said to be adopted from Chinese k i pan chess-board.

Android 沉浸式功能，可以定义透明沉浸式，也可有透明度的(Android Photo Encapsulation, more comprehensive, supporting Android 7.0)

一个Java实现的定器例子,里面实现了定时器所需的基本功能.-Realize the set of a Java browser example, which realize the basic functions required for the timer.

设计一个学生注册界面。输入的信息包括学号（6位数字），姓名（不超过6个汉字），密码（不少于6个字符，不多于8个字符，且需要输入2次，2次输入的密码必须完全相同），专业（从“数学”、“计算机”和“外语”中选择，也可以自行输入），年级（从“一年级”、“二年级”、“三年级”和“四年级”中选择一项，且只能选择一项）。点击“注册”按钮后，程序检查输入是否正确，若错误则显示相应的提示信息，否则弹出一个消息窗口，显示所有输入的注册信息。程序文件命名为Exe9_1.java(Design a student registration interface. Input information includes student number (6 digits), name (no more than 6 Chinese characters), password (no less than 6 characters, no more than 8 characters, and need to be input twice, the password must be exactly the same for two times), major (selected from "mathematics", "computer" and "foreign language" or self-input), grade (from "first grade", "second grade", "third grade). Choose one of the grades and the fourth grade, and only one of them. After clicking the "Registration" button, the program checks whether the input is correct, and displays the corresponding prompt information if the error occurs. Otherwise, a message window pops up to display all the input registration information. The program file is named Exe9_1. Java)

package com.tujia.ecd.test;      import java.util.Date;   import java.util.GregorianCalendar;      import net.sf.json.JSONObject;      public class Test {                     public static void main(String[] args) {                      //String json = "[{"logId":null,"userId":null,"operationTime":1449812923000,"pageId":null,"operationId":null,"ipAddress":null,"functionPage":"系统设置","operationName":"系统用户管理","operationUser":"admin"}]";                      JSONObject jsonObj = new JSONObject();                      jsonObj.put("logId", "null");           jsonObj.put("logId","null")