[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 Real Cost of a Paper Towel Dispenser: Why the Cheapest Option Can Cost You More

A facility manager shares a costly lesson learned from choosing a dispenser based on sticker price alone, and explains how to calculate the true total cost of ownership for commercial washroom equipment. [...]
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When 'Cheap' Costs More: My $1,200 Lesson in Print Rush Fees

A procurement manager shares the real cost of choosing the lowest quote for a last-minute print job, and why delivery certainty is worth paying for. [...]
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That Time I Saved $80 on Printing and It Cost Me $400: A Quality Manager's Lesson in Rush Orders

A quality control manager shares a real story about choosing standard shipping for business cards to save money, only to face a costly reorder and a hard lesson about the true value of FedEx Office's same-day services. [...]
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Emergency Packaging Orders: A Rush Job Decision Tree for When You're Out of Time

Need packaging supplies yesterday? An emergency procurement specialist breaks down your rush order options by scenario—from 'minor inconvenience' to 'business-threatening crisis'—with real-world cost/risk tradeoffs. [...]
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The EcoEnclose Packaging Review That Almost Cost Us a Client

A quality manager shares the story of a rushed packaging order that exposed the critical difference between a vendor who 'makes boxes' and one who understands brand integrity. It's a cautionary tale about specs, sustainability, and the hidden cost of assumptions. [...]
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The Rush Fee Is the Smartest Money You'll Spend

An office administrator with $60k in annual purchasing power explains why paying extra for guaranteed delivery isn't a luxury—it's a strategic necessity when deadlines are real. [...]
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Why I Think Your Packaging Choice Is Your Brand's First Impression (And How to Get It Right)

A procurement manager with 6 years of experience managing a $180K annual packaging budget argues that the quality of your food service containers directly impacts customer perception, and shares a data-driven approach to balancing cost with brand image. [...]
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How Do Modern Print Lines Build Durable Custom Car Stickers?

A production manager’s view of the technology evolution behind durable car stickers: from screen and UV to digital and hybrid lines, the parameters that matter, material-process interactions, and practical ways to squeeze reliable throughput without sacrificing quality. [...]
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Is Digital or Flexo Right for Branded Moving Boxes? Practical Answers for Real-World Orders

A sales-focused Q&A that compares Digital Printing and Flexographic Printing for branded corrugated moving boxes, with real numbers, scenarios, and decision guidance for retail ship centers and SMB operations. [...]
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By 2027, 60–70% of New Packaging SKUs Will Specify Lower-Impact Materials

A production manager’s take on the sustainability shift reshaping packaging—from CO2/pack to EPR fees—and how to turn pressure into practical gains. [...]
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