Java

Do an exercise: sell tickets to the small program, to achieve data sharing.Let's start by creating the thread and running alternately with the main thread.This is relatively simple:In terms of inheriting the thread class:Class MyThread extends

Public Staticstring GetEncoding (String str) {string encode= "GB2312"; Try { if(Str.equals (NewString (str.getbytes (encode), encode))) {String s=encode; returns; } } Catch(Exception Exception) {} encode= "Iso-8859-1"; Try

decimal-to-binary class demo1{public static void Main (string[] args) {int num =6;int[] arr = new Int[32];int index =0;while (num!=0 ) {arr[index++] = Num%2;num = NUM/2;} index--; for (; index>=0;index--) {System.out.print (Arr[index])

I. Class loader basic concepts 1. Get the class binary bytecode file 2. Convert to Class object (DefineClass () method) 3. Instantiate object two with newinstance (). The tree-like structure of the ClassLoaderThe ClassLoader in Java can be broadly

This article address: http://www.cnblogs.com/archimedes/p/java-study-note5.html, reprint please indicate source address.1, the method of the control processThere are three main types of process Control structures in Java:Sequential structureSelect

OK, ready, first blog open ~Android training, Java training, look forward to communicating with you!First listen to the other types of passion, grandpa, starting from here:A System classThe System class represents a class of systems, and the

This article address: http://www.cnblogs.com/archimedes/p/java-study-note2.html, reprint please indicate source address.1. Data typeThe Java data types are:Raw data type (Primitive Types)Reference type (reference type)The Java raw data type, also

This problem occurs when you add a project to Tomcat today: Tomcat version 6.0 only supports EE 1.2, 1.3, 1.4, and Java EE 5 Web ModulesThe reason for this is that the project used to be TOMCAT7. X now changes to tomcat6.x. (It should be possible to

Common Concurrency trap volatileVolatile can only emphasize the visibility of data and does not guarantee atomic operations and thread safety, so volatile is not a panacea. Re-ordering of reference instructionsVolatile is most commonly found in the

Java Web crawler framework:Apache Nutch, Heritrix, etc., mainly refer to 40 open source projects provided by the open source communityArticle background:Recently to write a crawler to capture Sina Weibo data, and then use Hadoop storage, analysis,

If Countdownlatch is a one-off, then cyclicbarrier just can be recycled. It allows a group of threads to wait for each other until a common barrier point (common barrier points) is reached. The so-called barrier point is the time when a set of tasks

Java Container class BasicsJava Utility Class Library provides a fairly complete set of container classes, the basic type is list,set,map,queue. They all have features, such as set that only holds one object for each value, and map allows you to

Import Java.awt.color;import java.awt.font;import Java.awt.graphics;import Java.awt.toolkit;import Java.awt.event.mouseevent;import Java.awt.event.mouselistener;import Java.awt.image.bufferedimage;import Javax.swing.jframe;import

In many cases we just need a simple, efficient, thread-safe increment-decrement scheme. Note that there are three conditions: simple, which means that it is easier for programmers to operate the underlying or implement as little as possible, and

One, in order to liveIn the past 7 years, the main use of. NET to live. Today is determined to be ready to learn Java again and want to reach a certain height, but also want to be the main use of Java to make money to live. Sorry for the vision, on

Transferred from: http://www.iteye.com/topic/875420 If you search the reason why the DCL in Java fails in the online analysis, will talk about the compiler will do optimization and so on, I believe you see this must feel very frustrated, very

Effective Java in the requirements of the class, interface, etc., summed up is enough to do, do not give too much access, the definition of the class is also, if a class is only used inside the class, then the class is defined as an inner class

Java Study Notes 4-basic concepts of classes and objects (2), learning notes 4 -- URL: http://www.cnblogs.com/archimedes/p/java-study-note4.html.1. object initialization and collection Object initialization When an object is generated, the system

Java operation SFTP and FTP Import java. util. properties; import org. slf4j. logger; import org. slf4j. loggerFactory; import com. jcraft. jsch. channel; import com. jcraft. jsch. channelSftp; import com. jcraft. jsch. JSch; import com. jcraft.

HQL basic Query simple Query result for output and Iterator output, hqliterator The first HQL course: Hibernate Query Language: hibernate Query Language 　　 Syntax: Query: String hql = "from dept "; Query query = session. createQuery (hql); //