Java

20145321 "Java Program design" The 2nd week study Summary textbook Learning content SummaryType, variable, operator1. Type (basic type)(1) Integers: Short (2 bytes), int (accounting for 4 bytes), Long (8 bytes) three kinds. The greater the number of

Naming of the packageThe package name should be made up of a lowercase word.Name of ClassClass names must be made up of uppercase letters and other lowercase words.Name of Class variableThe name of the variable must begin with a lowercase letter.

Here are some of the things you can do in Java programming as a summary of the reference network resources.1. Try to use a single case in the appropriate situationUsing a single example can reduce the load burden, shorten the loading time, improve

21.1Elicit ProblemsA question?Before we learned the array, fully realized the superiority of the array, that is can store the same type of data, but we assume that there is such a demand, we see how to solve?Please do a company staff salary

  Tags: xml to json JSON2014-05-20 20:55 6568 People read Comments (6) favorite reports Classification:"J2SE Foundation" (a)The code looks like this, and the importance of the codebase is found in this example, and if you build your own code base,

You can give the statement block designator a name that precedes the statement. Labels can only be referenced by continue and break. The format is as follows:label:statement   Only one label is allowed before the statement, and the label cannot be

While it can be said that a lot of programmers will use ThreadLocal, but I believe most programmers do not know ThreadLocal, and the use of ThreadLocal programmers mostly just know it but do not know why, therefore, Programmers using threadlocal

Http://www.cnblogs.com/dolphin0520/p/3811437.htmlDeep understanding of Java interfaces and abstract classesAbstract is one of the most important features of object-oriented programming. In Java, there are two ways to embody the abstraction of OOP:

Deep understanding of Java interfaces and abstract classesAbstract is one of the most important features of object-oriented programming. In Java, there are two ways to embody the abstraction of OOP: interfaces and abstract classes. There are too

1. using Swetakeqrcode to generate a QR code in a Java projecthttp://swetake.com/qr/ or Http://sourceforge.jp/projects/qrcode/downloads/28391/qrcode.zip .This was written by the Japanese and generated by our common square QR code .Can be in Chinese

First, StringBuffer classThe StringBuffer class, like String, is also used to represent strings, except that because the StringBuffer is implemented in a different way than string, the StringBuffer does not generate a new object when string

ArrayList and LinkedList normal for loop traversalFor most Java programmer friends, it is possible to use the most commonly used list is ArrayList, for ArrayList traversal, generally use the following wording:void Main (string[] args) { list

Computer questions (Elementary)-How to Implement Socket communication between the client and the server through Java) Many beginners are not familiar with java Network Communication and are not familiar with related concepts. Here we mainly

Recommendation of Java multi-thread programming Core Technology I wrote this blog to recommend a book "Java multi-thread programming core technology" to yuanyou. It is recommended mainly because it is easy to understand and runs through the entire

Use JSCH in Java to connect to a remote server and execute linux commands Sometimes you may need to use code to control the execution of linux commands to implement some functions. JSCH can be used to solve such problems. The specific code is as

POI allows you to read and write Excel files.1. Apache POI Overview Apache POI is an open source library of the Apache Software Foundation. Provides APIs for Java applications to read and write Microsoft Office files. The name of a foreigner is

Regular Expression --------- match URL or URL, regular expression --------- Regular Expressions match URLs or URLs   Regular Expression (http | ftp | https): \ // [\ w \-_] + (\. [\ w \-_] +) + ([\ w \-\., @? ^ = % & Amp ;:/~ \ + #] * [\ W \-\@? ^ =

Solve the problem that httpclient reports a certificate error when accessing ssl resources, httpclientssl public class HttpsTest { @SuppressWarnings("deprecation") public static void main(String[] args) { try { SSLContext

Brief Introduction to SSH integration 1. Brief Introduction to SSH integration1. Configure in web. xml Struts2 filter struts2 org. apache. struts2.dispatcher. ng. filter. strutsPrepareAndExecuteFilter struts2 /* added spring context

Atitit. History of asynchronous programming 1.1. TAP & async/await, atitit1.1. Atitit. History of asynchronous programming 1.1. TAP & async/await       1. History of asynchronous programming 1 1.1. Thread1 1.2. Task1 1.3. Async await2 1.3.1. await