[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

Digital Printing vs Flexographic Printing: Choosing the Right Path for Flexible Food Packaging

A packaging designer’s practical look at when to choose digital or flexo for flexible Food & Beverage packs, with color control, compliance, and real production trade-offs. [...]
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Is Digital Printing Right for Multi‑SKU Round Labels—and Can You Print Them from Excel?

A practical, comparison-driven guide for North American teams weighing digital vs flexo for label runs, including variable data, substrates, costs, and real-world scenarios like yarn labeling and retail craft lines. [...]
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Solving Size, Color, and Turnaround Challenges in European Poster Projects with Digital Printing

A practical, specification-driven overview for teams commissioning posters in Europe—covering technology, performance, substrates, and rollout planning. [...]
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A Practical Guide to Digital Printing Implementation for Business Cards in European Shops

A production manager’s step-by-step view on planning, integrating, and tuning digital printing for business cards—covering format choices, color targets, finishing flow, and realistic KPIs for European operations. [...]
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The Future of Digital Printing for Branded Cards and Packaging in North America

A brand manager’s outlook on how digital printing, on-demand models, and sustainability will reshape business cards, labels, and light packaging across North America—through the lens of small-business behaviors and same-day expectations. [...]
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The Future of Digital and Hybrid Printing for Labels and Stickers in Europe

A pragmatic forecast from the press floor: where digital, hybrid, and sustainable technologies are taking European label and sticker production—and how consumer behavior and on-demand business models will reshape the next three years. [...]
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What Makes Modern Sheet Label Printing Sustainable—and How Do You Set It Up Right?

A sustainability expert’s take on the evolving technology behind sheet label production, from press choice and color control to Word templates and compliance. Real parameters, real trade-offs. [...]
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Why Digital Printing Gives Labels an Edge for European Brands

A packaging designer’s take on the technical advantages of digital label production for food and beverage brands in Europe—specs, applications, quality, implementation, and how it compares. [...]
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What's Driving Digital Printing Adoption in North American Packaging?

A production manager’s technical outlook on why digital, hybrid, and software-driven workflows are reshaping packaging print in North America—what’s real, what’s hype, and what to watch next. [...]
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Digital Printing for Custom Stickers: Applications and Benefits from Events to Retail

A practical, engineer’s view on how digital printing, substrates, and variable data come together to produce durable custom stickers—covering food & beverage use, material choices, data codes, and planning tips in North America. [...]
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