[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

2025 Label Design Trends: The Rise of Digital Printing and Circular Thinking

A sustainability-led look at how digital printing, material choices, and smart finishing are reshaping label design—without ignoring real-world trade-offs and workflow realities. [...]
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5 Key Trends Shaping Digital Printing Adoption in Asian Packaging

A designer’s market-eye view of how Asia’s packaging printing landscape is shifting toward digital—driven by e-commerce, on-demand models, sustainability, and new buyer behavior. [...]
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A Practical Guide to Business Card Production: Digital, Offset, and the Finish That Matters

A designer’s process-focused guide to planning, material choice, finishing, and workflow for brand-worthy business cards—grounded in print technologies and real production constraints. [...]
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Which Printing Method Fits Your Custom Stickers and Magnets? Your Questions, Answered

A designer’s comparison of Digital, Flexographic, and Screen options for short-run stickers and small-format magnets—what to choose, why it matters, and how to decide. [...]
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Digital Printing vs Flexographic Printing: Which Path Serves Sustainable Label Design Better?

A sustainability-focused, real-world comparison of Digital and Flexographic printing for labels—balancing materials, energy, waste, and regulatory clarity for OTC and retail brands across North America. [...]
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Can Digital or Flexo Handle Your Variable Labels? How to Print Address Labels from Excel, Practically Answered

A sales manager’s comparison-led guide for European converters choosing between Digital Printing and Flexographic Printing for variable labels, with a practical walk-through on how to print address labels from Excel. [...]
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North American Digital Poster Printing to Grow 10–12% CAGR Through 2026: Sustainability Will Drive the Shift

A sales-focused look at how sustainability, personalization, and on-demand models are reshaping poster printing in North America—and what buyers should expect on cost, speed, and quality. [...]
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How Finish and Hierarchy Influence Sticker Purchases: The Psychology of Packaging That Gets Picked Up

A sales-first, design-smart walkthrough of how visual hierarchy and finishing choices shape sticker and card packaging that shoppers actually choose—grounded in European use cases and practical print constraints. [...]
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Beauty & Personal Care Case Study: Cedar & Sage Organics’ Digital Printing Implementation

A production manager’s deep interview on how a North American beauty brand stabilized color, shortened changeovers, and managed costs by shifting short-run folding cartons to digital printing—with practical trade-offs and lessons. [...]
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Corrugated Box Printing: Process Control for Real-World Production in Europe

A sales-focused, practical overview of process control for corrugated box printing in Europe—covering parameters, standards, and substrate choices, with honest trade-offs and customer questions addressed. [...]
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