[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

Duck Tape vs. Duct Tape: Why the Name Matters More Than You Think

A procurement manager's perspective on the difference between 'duck tape' and 'duct tape', and why the choice impacts your brand's perceived value. [...]
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Dart Container 2025 Guide: Specs, Logo Files, and 5 Mistakes I've Made Ordering Packaging

A practical FAQ answering the most common questions about Dart Container products, ordering, and specifications. Written from the perspective of someone who has made costly mistakes so you don't have to. [...]
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The 6-Step Checklist for Buying Thermal Bubble Wrap (And Avoiding Hidden Costs)

A practical, step-by-step guide for procurement managers and packaging buyers on how to select thermal bubble wrap, check sizes, avoid overpaying, and verify envelope dimensions like A6. [...]
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Boxup Rental vs. Promo Code: What Works Best for Your Business Packaging?

Should you rent packaging equipment or use promo codes to lower costs? A practical guide based on real experience, not theory. [...]
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My Brother HL-L6200DW Setup Disaster & Fixes: iPhone Wi-Fi, Toner Lies, and a Water Bottle Bong.

A IT manager shares hard-earned lessons from setting up a Brother HL-L6200DW printer. Includes fixes for iPhone connection problems, the 'replace toner' error that isn't, and a ridiculous story about a DIY project. [...]
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I've Wasted Over $4,000 on Failed Print Orders. Here’s My Checklist So You Don't Have To.

A firsthand account of costly printing mistakes in packaging and marketing materials, with a practical checklist to prevent errors, especially for orders involving Berry Global specifications. [...]
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Amcor & Bemis: One Procurement Manager’s Cost-Benefit Analysis of the Acquisition, 5 Years Later

A practical breakdown of the Amcor Bemis acquisition from a procurement perspective. We compare pre- and post-merger pricing, service, and innovation to help you decide if the combined entity is the right fit for your packaging budget. [...]
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Quality is Not a Cost: A Quality Inspector's First Reel of Bankers Boxes

A quality inspector shares a real-world lesson on how a $0.30 specification difference on a Bankers Box order led to a $22,000 redo and a complete overhaul of our vendor vetting process. [...]
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Bought Avery 5160 Labels? Don't Make These 4 Mistakes I Did (With a Quick Pre-Print Checklist)

Avoiding common pitfalls when using Avery 8160 and 5160 shipping labels. A step-by-step guide from someone who has learned the hard way about template alignment, printer settings, and barcode testing. [...]
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Is Digital or Flexo the Right Choice for Short-Run Adhesive Labels in Europe?

A practical, engineering-led comparison to help European converters select between digital and flexographic printing for short-run label work, with real-world ranges, EU compliance notes, and trade-offs that actually show up on press. [...]
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