[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 Corrugated Board Advantage in Household Moving Packaging

A brand manager’s view on why corrugated board, paired with the right print and finishing choices, is the pragmatic solution for household moving boxes across Europe. [...]
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How Three Brands Overcame Short-Run Chaos with Digital and Flexo Packaging

A production-side comparison of three brands that stabilized color, reduced changeovers, and tightened costs using digital, flexo, and hybrid workflows for custom boxes. [...]
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6-Step Checklist: Verifying Greiner Packaging Specs Before Your First Order

A practical quality inspection checklist for B2B buyers ordering Greiner packaging or Bio-One lab consumables for the first time, covering spec verification, inspection protocols, and common pitfalls. [...]
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"We needed sticker quality we could trust at scale": Atlas Luggage on Their Digital Printing Journey

How a global travel brand tackled short-run chaos, clarified pricing, and stabilized quality by shifting to a digital sticker program with a structured challenge–solution–results approach. [...]
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I Spent 6 Years Tracking Georgia Pacific Dispenser Costs. Here's What The Sticker Price Didn't Tell Me.

A procurement manager's data-backed argument for why total cost of ownership (TCO) matters more than the upfront price when choosing Georgia Pacific dispensers and refills. [...]
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How a North American Coffee Roaster Halved Waste and Cut CO₂/pack 12–18% with Digital Printing

A complete project story of a mid-sized coffee brand that shifted to FSC cartons, Digital Printing, and LED-UV finishing—achieving single‑digit scrap, tighter color, and a leaner carbon footprint, with candid notes on cost, finance, and trade-offs. [...]
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Is Digital Printing the Future of Packaging in Europe?

A production manager’s take on where European packaging is headed: digital adoption, sustainable materials, e‑commerce demands, and the practical limits you meet on the plant floor. [...]
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My Loctite Threadlocker Blunders: A $4,200 Mistake Checklist (and How to Avoid It)

I've documented over $4,200 in threadlocker mistakes since 2021. Here's my hard-won 5-step checklist to pick the right Loctite product every time, with specific scenarios and pricing based on my actual failures. [...]
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A Quality Inspector's Checklist: What to Verify Before Approving a POD Book Printing Project

A quality control professional's practical guide to verifying print specifications and book quality for print-on-demand manufacturing, based on years of reviewing projects. [...]
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How Does Digital Printing Achieve Superior Quality for Sheet Labels?

A brand manager's field guide to the technical evolution behind high-quality sheet labels—what changed, which parameters matter, and how to align quality specs with real-world production. [...]
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