[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

Hallmark Labels, Promo Codes, and Coffee Bags: A Cost Controller's Guide to Smart B2B Spending

A procurement manager with 6 years of experience managing a $180,000 annual budget breaks down when to pay for premium (like Hallmark), when to chase discounts, and when the cheapest option is actually the smartest move. [...]
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Garment Bag vs. Poster Frame: Which One Actually Saves You Money (and Embarrassment)?

A procurement specialist with over $5,000 in documented mistakes breaks down the real cost of choosing the wrong packaging or display solution. Learn the hidden pitfalls of garment bags and poster frames to protect your budget and your reputation. [...]
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The Office Admin's Checklist for Switching to a New Facility Supplies Vendor (Without the Headaches)

A practical, step-by-step guide for office administrators and procurement managers on how to evaluate and transition to a new B2B supplier for packaging, janitorial, and paper products, based on real-world experience managing vendor relationships. [...]
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Hallmark E-Cards, Promo Codes, and Rush Orders: A Real-World Guide for B2B Buyers

A practical guide from a procurement specialist on navigating Hallmark's digital and print offerings, understanding true costs, and making smart decisions for urgent orders. [...]
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Greif Packaging: An Office Admin's FAQ on Sourcing Industrial Supplies

A practical guide for office administrators and small business buyers navigating industrial packaging and supply procurement, based on real-world purchasing experience. [...]
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The Rush Order Trap: Why the 'Cheapest' Quote Almost Always Costs You More

An emergency logistics specialist breaks down the hidden costs of rush orders and explains why focusing on total cost, not just the sticker price, is the only way to make smart decisions under pressure. [...]
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The $1,400 Typo: How a Quality Checklist Saved Our Print Orders (and My Sanity)

A quality manager shares the story of a costly printing mistake, the 12-point checklist it inspired, and why five minutes of verification beats five days of correction. [...]
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Why I'll Pay a Premium for Guaranteed Delivery Every Time (And You Should Too)

A procurement manager with six years of budget oversight explains why the certainty of on-time delivery is worth more than a lower price tag, especially when deadlines are tight. [...]
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How to Open a Georgia-Pacific Paper Towel Dispenser (And Why You Shouldn't Wait Until It's Empty)

A facility manager's guide to the most common Georgia-Pacific dispenser models, the one mistake that costs time and money, and why proactive maintenance is cheaper than emergency fixes. [...]
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The Cost Controller's Checklist for Ordering Custom Printed Envelopes

A procurement manager shares a step-by-step checklist for ordering custom envelopes, based on 6 years of tracking $180,000 in printing spend. Learn how to avoid hidden fees, ensure USPS compliance, and get what you pay for. [...]
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