https://blog.youkuaiyun.com/Meng72ndsczh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/Meng72ndsc/article/details/5954176https://blog.youkuaiyun.com/Meng72ndsc/article/details/5954176Meng72ndscWed, 20 Oct 2010 14:50:00 +0800https://blog.youkuaiyun.com/Meng72ndsc/article/details/5954014https://blog.youkuaiyun.com/Meng72ndsc/article/details/5954014Meng72ndscWed, 20 Oct 2010 13:53:00 +0800https://blog.youkuaiyun.com/Meng72ndsc/article/details/5863878https://blog.youkuaiyun.com/Meng72ndsc/article/details/5863878Meng72ndscSat, 04 Sep 2010 22:45:00 +0800我看增删改查

看了这么久的网站后台管理，其实都是在做一些增删改查的操作。感觉到还是很简单的。于是写一点心得体会。

在昨天，我的增删改查语句是这样写的：
/** * 增加数据 * * @param username * 用户名 * @param passwd * 密码 * @param email * 电子邮件 * ]]>https://blog.youkuaiyun.com/Meng72ndsc/article/details/5825689https://blog.youkuaiyun.com/Meng72ndsc/article/details/5825689Meng72ndscFri, 20 Aug 2010 10:00:00 +0800https://blog.youkuaiyun.com/Meng72ndsc/article/details/5825053https://blog.youkuaiyun.com/Meng72ndsc/article/details/5825053Meng72ndscThu, 19 Aug 2010 22:15:00 +0800https://blog.youkuaiyun.com/Meng72ndsc/article/details/5824654https://blog.youkuaiyun.com/Meng72ndsc/article/details/5824654Meng72ndscThu, 19 Aug 2010 18:00:00 +0800https://blog.youkuaiyun.com/Meng72ndsc/article/details/5824434https://blog.youkuaiyun.com/Meng72ndsc/article/details/5824434Meng72ndscThu, 19 Aug 2010 16:54:00 +0800我早就发了这则文章了的，但是为什么优快云总是打折扣，不全部显示，现在只能重新修改了再发了。

1、创建一个枚举类
EnumDemo.java

public enum EnumDemo {
}
2、我们来猜测一下这个枚举类？
2.1、查看它的字节码文件
Compiled from "EnumDemo.java"
public final class EnumDemo exte]]>https://blog.youkuaiyun.com/Meng72ndsc/article/details/5824205https://blog.youkuaiyun.com/Meng72ndsc/article/details/5824205Meng72ndscThu, 19 Aug 2010 15:50:00 +0800在枚举值声明完毕之后应该有一个分号：
publicenum MyColor {
    RED,
    privateMyColor () {
    }
}


打下横线的地方表示有错误产生。
修改方式：将逗号该为分号。
publicenum MyColor {
    RED;
    private MyColor() {
    }
}https://blog.youkuaiyun.com/Meng72ndsc/article/details/5823324https://blog.youkuaiyun.com/Meng72ndsc/article/details/5823324Meng72ndscThu, 19 Aug 2010 11:21:00 +0800学了File，想写点什么了。那就来写一个对文件进行修改的小程序吧！
 
package com.io; import java.io.*; /** * 功能说明：对文件名进行修改 * * @author 刘军 * */ public class Hello2 { public static void main(String[] args) throws Exception { String sep = "G:/root"; Fil]]>https://blog.youkuaiyun.com/Meng72ndsc/article/details/5821459https://blog.youkuaiyun.com/Meng72ndsc/article/details/5821459Meng72ndscWed, 18 Aug 2010 16:20:00 +0800https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819635https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819635Meng72ndscTue, 17 Aug 2010 23:45:00 +0800https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819546https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819546Meng72ndscTue, 17 Aug 2010 22:59:00 +0800https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819403https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819403Meng72ndscTue, 17 Aug 2010 21:55:00 +0800integer to String :
int i = 42; String str = Integer.toString(i); or String str = "" + i
double to String :
String str = Double.toString(i);
long to String :
String str = Long.toString(l);
float to String :
St]]>https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819301https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819301Meng72ndscTue, 17 Aug 2010 21:01:00 +0800Point.java
package com.collection; /** * 如果要将加入到列表当中的Point对象进行排序，那么这个Point就必须
* 实现Comparable接口。并且实现compareTo方法。 * * @author 刘军 * */ public class Point implements Comparable { int x, y; public Point(int x, int y) { ]]>https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819288https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819288Meng72ndscTue, 17 Aug 2010 20:54:00 +0800https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819279https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819279Meng72ndscTue, 17 Aug 2010 20:46:00 +0800
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从享受生活的角度上来说："程序员并不是一种最好的职业，我认为两种人可以做程序员，第一，你不做程序员，你就没有什么工作可做，或者说是即使有可以做的工作但是你非常不愿意去做；第二，你非常痴迷和爱好程序，并且在这方面有一些天赋和优势。程序员的结局也是有两种：第一，默默退休，第二以程序员为起点或跳板，注意积累，跟对了好的老板或团队，找到和很好的搭档自己创业，成为IT金领和富翁。"https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819252https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819252Meng72ndscTue, 17 Aug 2010 20:34:00 +0800MyServer.java
 
package com.net; /** * 别人做了一次，我自己也来做一次吧 * 服务器端 */ import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.io.Buffere]]>https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819247https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819247Meng72ndscTue, 17 Aug 2010 20:28:00 +0800package com.io; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.io.O]]>https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819212https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819212Meng72ndscTue, 17 Aug 2010 20:03:00 +0800Student.java
package com.io; import java.io.IOException; import java.io.RandomAccessFile; import java.io.Serializable; public final class Student implements Serializable { /** * */ private static final long serialVersionUID = 1L; ]]>https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819204https://blog.youkuaiyun.com/Meng72ndsc/article/details/5819204Meng72ndscTue, 17 Aug 2010 19:59:00 +0800