[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

Amex Business Gift Card vs. Standard Procurement: What an Admin Actually Learned

A real-world procurement comparison from an office admin who manages purchasing for a mid-sized company. Amex business gift cards vs. standard vendor purchasing. Honest take on when each works. [...]
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GotPrint Review: What 3 Years of Ordering Mistakes Taught Me About Promo Codes, Envelope Labels, and Print Files

A practical GotPrint review from a small business owner who learned the hard way how to use promo codes, format envelope labels, and avoid common printing mistakes. [...]
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Custom Labels & Packaging: A Buyer's 3-Scenario Guide (Not a One-Size-Fits-All Answer)

Stop looking for the 'best' label company. This guide breaks down the decision into three real-world scenarios based on your budget, volume, and complexity, based on insights from a procurement manager. [...]
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Why I Rejected 3,000 Envelopes (And Why Your Printer Might Be Wrong About Paper)

A quality inspector recounts a project where envelope and print stock decisions nearly went wrong, offering lessons for designers and print buyers on paper weight, texture, and brand perception. [...]
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Why I stopped chasing the cheapest bottle supplier and started paying more attention to total cost

A procurement manager explains why a low Fillmore Container discount code often hides higher total costs, and how a mindset shift about glass jar sourcing saved their company 17% annually. [...]
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EcoEnclose: Your 8-Point FAQ on Eco-Friendly Shipping for 2025

A practical, cost-focused FAQ on EcoEnclose mailers, coupons, and sustainable packaging. Insights from a procurement manager on real costs and industry shifts. [...]
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Passap E6000 vs E6000 Plus: My Checklist for Choosing the Right Adhesive (and Avoiding My $450 Mistake)

A practical guide comparing Passap E6000 and E6000 Plus for craft, shoe repair, and jewelry projects. Includes a step-by-step checklist based on real-world experience, including a costly error. [...]
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48 Hour Print Reviews: What a Procurement Manager Actually Thinks (With Promo Codes)

Honest 48 hour print reviews from a procurement perspective. We cover cost, quality, turnaround, and actual promo code strategies from someone who's tracked 200+ orders. [...]
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My Procurement Shortcut: An 8-Step Checklist for Ordering Berlin Packaging Supplies from Chicago

A personal, step-by-step guide from an office administrator on how to efficiently order packaging materials like glass bottles and boxes from Berlin Packaging, including tips on avoiding common procurement pitfalls. [...]
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Why I Stopped Swearing at My Car Mirror (and Kept Swearing at Glue)

A procurement manager's journey from buying cheap adhesive to calculating true cost of ownership on 3M products, with a side of pinstripe removal trauma. [...]
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