[置顶] JAVA学习路线

一:J2SE 面向对象-封装、继承、多态内存的分析递归集合类、泛型、自动打包与解包、AnnotationIO 多线程、线程同步 TCP/UDP AWT、事件模型、匿名类正则表达式反射机制2:数据库(Oracle或者MySQL)SQL语句多表连接,内外连接, 子查询等管理表、视图、索引、序列、约束等树状结构存储存储过程、触发器 数据库设计三范式、3:JDBCJDBC基础连接池 树状结构存储与展现Da

佛曰

此身如同臭皮囊,色身无常,此身非我,须当厌离

痛失新车

2009.11.23日晚,新车被盗。悲。

农夫养牛问题

一个农夫养了一头牛,三年后,这头牛每年会生出1头牛,生出来的牛三年后,又可以每年生出一头牛,请问农夫10年后有多少头牛?n年后呢?必要条件:生下来的全是母牛,且无不孕不育症,有专业公牛负责。斐波那契函数解决方法:    //总时间    String inputStr = 10;    //周期 &

文件上传

本人超级新人,折腾了一下午写的。用Hashtable存储表单项及其值,本来想做成兼容同名的,结果搞得个四不像,求指导。 FileUpload.java[code=Java]package business;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.i

新买的自行车

 

猜数字升级版

package org.blackice;

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class GuestNumber {

        /**
         * @param args
...

猜数字游戏

package org.blackice.test;
import java.util.*;
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class GuestNumber {

        /**
         * @param args
...

杨辉三角

public class YangHui{
        public static void main(String arg[]){
                int i=1,j=1,iOf=0;
                int iN = 20;
...

求阶乘

public class Factor{
        public static void main(String arg[]){
                int i=1,j=1,iR=0;
                int[] arr = new int[]{2,4,6,10};
...

java内存泄露

Java的一个重要优点就是通过垃圾收集器(Garbage Collection,GC)自动管理内存的回收,程序员不需要通过调用函数来释放内存。因此,很多程序员认为Java不存在内存泄漏问题,或者认为即使有内存泄漏也不是程序的责任,而是GC或JVM的问题。其实,这种想法是不正确的,因为Java也存在内存泄露,但它的表现与C++不同。随着越来越多的服务器程序采用Java技术,例如JSP,Servlet

Graham Packaging FAQ: A Cost Controller's Guide to Sourcing Rigid Plastic Containers

A procurement manager breaks down the real costs, hidden fees, and critical questions to ask when sourcing custom blow-molded plastic packaging from suppliers like Graham Packaging. [...]
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Is GotPrint Legit for Rush Orders? An Emergency Specialist's Review

Based on 200+ rush job experiences, here's the unvarnished truth about using GotPrint when you're up against a deadline. We cover reliability, hidden costs, and when to look elsewhere. [...]
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When Your Packaging Fails: The Real Cost of Cutting Corners on Rush Orders

An emergency procurement specialist shares hard-won lessons on handling last-minute packaging disasters, why quality perception matters more than you think, and how to make the right call when time is running out. [...]
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The Real Cost of Your Washroom Dispenser: Why Unit Price is a Trap

A procurement manager breaks down the hidden costs in commercial washroom systems, from refill headaches to maintenance surprises, and explains why the cheapest dispenser often ends up costing you more. [...]
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When You Need Packaging Yesterday: The Rush Order Reality from Someone Who's Paid the Price

An emergency procurement specialist shares hard-won lessons on navigating rush packaging orders, explaining why certainty is worth the premium and how to avoid costly mistakes when time is short. [...]
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Why 'Just Get a Quote' Is the Worst Advice for Paper Procurement

A procurement manager with $180,000 in tracked spending argues that focusing on unit price is a trap. Real cost control means understanding total cost of ownership, hidden fees, and the true value of supplier relationships—especially with brands like French Paper. [...]
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FedEx Office for Rush Orders: When It Works, When It Doesn't, and How to Calculate the Real Cost

A practical guide from an operations specialist on using FedEx Office for emergency printing, based on 200+ rush jobs. Learn how to evaluate total cost, avoid hidden fees, and know when to look elsewhere. [...]
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EcoEnclose Reviews & Free Shipping: An Emergency Specialist's FAQ

A packaging procurement veteran answers the most urgent questions about EcoEnclose, from rush orders and free shipping to opening their mailers without a hitch. [...]
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The Real Cost of Business Printing: A Procurement Manager's 6-Step Checklist to Avoid Hidden Fees

Stop overpaying for business cards and flyers. A cost controller with 6 years of experience shares a practical checklist to compare quotes, spot hidden fees, and calculate the true total cost of your next print job. [...]
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The 7-Step Checklist I Use to Order Custom Labels (Without Getting Burned)

An office administrator shares a detailed, battle-tested checklist for ordering custom labels and placards, covering everything from verifying vendor invoicing to avoiding common compliance pitfalls. [...]
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