[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

International Paper vs. Online Print Shops: A Procurement Manager's Honest Comparison

As an office administrator managing $150k+ in annual print spend, I compare International Paper's direct services to online print shops across cost, quality, and logistics. Learn which option fits your company's size, needs, and tolerance for hassle. [...]
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Hallmark Cards for Business: A Cost Controller's FAQ on Greeting Cards, Printing, and Hidden Fees

A procurement manager breaks down the real costs of ordering greeting cards for business use, from Hallmark's online options to custom printing pitfalls. Based on 6 years and $180,000 in tracked spending. [...]
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The Hallmark Card Studio Decision: Why I Chose Manual Over Automatic for Our Corporate Gifting

A procurement manager shares the real-world cost analysis behind choosing Hallmark's manual card design service over automated platforms, revealing the hidden fees and quality pitfalls that impact B2B budgets. [...]
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Greif Containerboard vs. Generic Suppliers: A Procurement Reality Check

An office administrator shares a side-by-side comparison of sourcing industrial packaging like Greif containerboard versus generic suppliers, focusing on total cost, reliability, and the hidden factors that impact your bottom line. [...]
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Rush Printing: When to Pay Extra and When to Wait

A practical guide for procurement and operations professionals on navigating emergency print jobs, based on real-world experience managing hundreds of rush orders. [...]
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Graham Packaging vs. Local Printers: A Quality Manager's Total Cost Breakdown

Choosing between a national packaging supplier like Graham Packaging and a local printer for custom containers? A quality compliance manager breaks down the real costs, risks, and trade-offs beyond the initial quote. [...]
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Green Bay Packaging: How to Choose the Right Supplier for Your Business (It's Not Just About Price)

A quality manager breaks down how to choose a packaging supplier based on your specific business scenario—volume, complexity, and risk tolerance—and why Green Bay Packaging fits certain needs better than others. [...]
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Your Office Ordering Questions, Answered: From Hallmark Cards to Data Catalogs

A purchasing administrator shares practical answers to common office ordering questions—covering everything from bulk greeting cards and promotional items to building internal data systems. [...]
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Why Your Hallmark Card Orders Keep Going Wrong (And What's Actually Behind It)

An office administrator breaks down the real reasons corporate greeting card programs fail—from ordering chaos to hidden workflow gaps—and shares a simpler approach after managing $15K annually in card purchases. [...]
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How to Open a Georgia-Pacific Paper Towel Dispenser Without a Key (And Why You Might Need To)

A step-by-step checklist for facility managers who've lost their dispenser key or inherited a building with locked Georgia-Pacific units. Based on 7 years of maintenance mistakes and the $890 lesson that taught me to always have a backup plan. [...]
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