[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

Five Trends Reshaping Poster Printing in Europe: Speed, Sustainability, and On‑Demand Expectations

A sales-side view of where European poster printing is headed: market dynamics, digital workflows, changing buyer behavior, and sustainability trade-offs—told with real-world timelines and practical metrics. [...]
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6 Trends Reshaping North American Labels and Packaging

A market-focused look at how digital adoption, sustainability goals, e-commerce logistics, and personalization are redefining label production and design in North America. [...]
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Loctite 565 vs. Frekote 770-NC: An Admin's Guide to Picking the Right Sealant

Stuck between Loctite 565 and Frekote 770-NC? I manage ordering for a 150-person manufacturing plant and have used both. Here's my real-world, side-by-side comparison to help you decide. [...]
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How a Coffee Startup Reframed Its Packaging with Digital Printing: A Side-by-Side Look at the Decisions That Mattered

A sales-side look at the real design choices—technology, finishes, and cost trade-offs—that shaped a North American brand’s packaging reboot. [...]
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The Lightning Source Checklist: How to Avoid the 3 Most Common (and Costly) POD Submission Mistakes

A production manager with over 200 Lightning Source orders shares the specific, expensive mistakes that led to a foolproof pre-submission checklist, saving thousands in wasted print runs. [...]
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Labelmaster's DG Software & Symposium 2025: A Quality Manager's FAQ

A quality compliance manager answers the real questions about Labelmaster's dangerous goods software and training, based on hands-on experience with deadlines and vendor specs. [...]
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The 5-Point Pre-Press Checklist That Saved Me $3,200 (And My Sanity)

A packaging and print buyer shares the exact checklist she uses to avoid costly pre-press errors, based on years of documented mistakes. Learn how to verify bleed, color, and file specs before you submit. [...]
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Hallmark Quality Control FAQ: What Your Retail Store or Business Should Know Before Ordering

A Hallmark quality manager answers common questions about ordering greeting cards, packaging, and paper goods for retail or corporate use. Learn how to avoid common mistakes, understand specs, and get what you actually need. [...]
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The Real Cost of Greeting Cards: Why the Cheapest Option Is Almost Never the Best

A procurement manager with six years of budget oversight explains why total cost trumps sticker price when sourcing greeting cards, and how to avoid the hidden fees that eat into your bottom line. [...]
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How to Order Lab Consumables and Packaging from Greiner Bio-One & Packaging: A Procurement Checklist

A step-by-step guide for office administrators and procurement specialists on navigating Greiner's dual business lines, ensuring correct ordering, and avoiding common pitfalls with small-batch or first-time orders. [...]
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