[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

The Eco-Friendly Packaging Vendor Who Earned My Trust by Saying "That's Not Our Thing"

A procurement manager with a $180k annual packaging budget explains why a vendor's willingness to admit their limitations is a stronger sign of quality than a promise to do everything. [...]
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The One Thing I Always Check Before Printing Envelopes (It's Not the Address)

A packaging buyer shares the costly mistake that taught her to verify a specific USPS regulation before every envelope order, saving thousands in wasted print runs. [...]
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The Cost Controller's Checklist: How to Actually Compare Disposable Product Vendors (Beyond the Unit Price)

A procurement manager with $180k in annual spending shares a 5-step checklist to compare disposable product vendors, focusing on hidden costs, delivery reliability, and total cost of ownership. [...]
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The Hidden Cost of 'Probably On Time': Why I Budget for Rush Printing Now

An office administrator shares the hard lessons learned from missed deadlines and unreliable vendors, explaining why paying a premium for guaranteed delivery is a non-negotiable part of smart purchasing. [...]
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The Real Cost of a Flyer Isn't What You Think It Is

An office administrator breaks down the hidden costs and common pitfalls of flyer printing, from USPS regulations to vendor reliability, based on managing $50K+ in annual print orders. [...]
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Boxup Rental vs. Buying Your Own Packaging: A Procurement Manager's Side-by-Side Breakdown

An office administrator with $40k in annual vendor spend breaks down the real costs, flexibility, and hidden headaches of renting packaging versus buying it outright. Based on managing 60+ orders a year for a 150-person company. [...]
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The Quality Manager's Checklist for Ordering Printed Envelopes (Without Wasting Money)

A practical, step-by-step guide for procurement and quality professionals to specify and order printed envelopes, avoiding common pitfalls and hidden costs. Based on real-world experience reviewing thousands of items. [...]
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The Amcor-Bemis Acquisition: A Procurement Manager's FAQ on What Changed (and What Didn't)

A cost controller breaks down the real-world implications of the Amcor-Bemis deal for packaging buyers. From supply chain stability to hidden cost shifts, here's what you need to know. [...]
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Berlin Packaging: A Cost Controller's FAQ on B2B Packaging Procurement

A procurement manager with over $180k in annual packaging spend answers the real questions about working with suppliers like Berlin Packaging—beyond just the price tag. [...]
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The Real Cost of 'Cheap' Packaging: Why the Lowest Quote Often Costs You More

A procurement veteran shares hard-won lessons from managing hundreds of packaging orders, explaining why focusing on total value—not just unit price—is the only sustainable strategy for beverage brands. [...]
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