cassandra example java

This article will discuss about Thread pool that uses single thread to execute tasks. From Java 5.0 + one can get such pool from Executors using following method-Public static ExecutorService newSingleThreadExecutor ()Creates an Executor that uses a single worker thread operating off an unbounded queue. (Note however that if this single thread terminates due to a failure during execution prior to shutdown, a new one will take its place if needed to ex

; Registered Singleton class. Similar to the method in spring, the class name is registered, the next time from the inside to get directly. Public class Singleton3 { private static mapnew hashmap static{ Singleton3 single = new Singleton3 (); Map.put (Single.getclass (). GetName (), single); } //Protect the default construction child protected Singleton3 () {} //Static factory method to return such unique instances public static Singleton3 getinstance (String

A few days ago wrote a memory leak of the article, which describes the memory leaks related knowledge: http://blog.csdn.net/u010590685/article/details/46973735But the example given here is not very good, see a good example here today to add to everyone.If we write a stack ourselves, here is the Pop method: publicpop(){ Object object=arrays[size]; size--; return object; }In this me

Oracle technology _ 5 minutes will use stored procedure _ simple example of stored procedure (including loop, condition, add and modify query, parameter input, variable assignment, java call, etc.), oracle_5 Example business functions: 1. query the data in PROCEDURE_TEST_A table and PROCEDURE_TEST_A_SUB table based on the input type A_TYPE and display the main co

Yesterday borrowed a "Web Design Experiment Tutorial (Java language)", and then read the first chapter, a swing example, so for everyone to share!As for the coding and decoding of the data, I think it has been explained very clearly in the example, and two methods have been done.Turn it into a 16-binary.//UTF8 decodingBtnutf8decode =NewJButton ("utf8\u89e3\u7801\

? FalseUsing Shutdownoutput to close the output stream, is the socket closed? FalseClose the output stream using close, does the socket close? TrueCan the output stream be re-opened after using Shutdownoutputstream? ***Is the data in the output buffer discarded or sent? ****---------------------------------Server------------------------------I am the server, I am listening on the 9999 port ....I am the server, I am listening on the 9999 port ....Java.io.EOFExceptionAt Java.io.DataInputStream.rea

Java implementation drag-and-drop example Swing in the implementation of drag-and-drop function, the code is very simple, have comments, see for yourself, the operation effect of the following figure: Copy Code code as follows: Package com; Import java.awt.*;Import Java.awt.datatransfer.DataFlavor;Import java.awt.dnd.DnDConstants;Import Java.awt.dnd.DropTarget;Import Java.awt.dnd.DropTarge

}*/ protectedOnclicklistener Monclicklistener; /*** Setonclicklistener () parameter is Onclicklistener interface------> Background three * Register a callback to being invoked when the this view I S clicked. If This view was not * clickable, it becomes clickable. * * @paramL The callback that'll run * *@see#setClickable (Boolean)*/ Public voidSetonclicklistener (Onclicklistener l) {if(!isclickable ()) {setclickable (true); } Monclicklistener=l; } /*** Call this view

In the previous article, we talked about MongoDB's command to get started, this blog will be based on the previous blog created database and table completed a simple Java MongoDB CRUD Example, using Java to connect MongoDB database. and implement routines such as creating a database, getting a table, traversing objects in a table, and CRUD operations on objects i

Example of calling axis2 WebService in Java :, Package CN. well. step. webService. kiosk; import Java. util. date; import Java. util. iterator; import Org. apache. axiom. om. omabstractfactory; import Org. apache. axiom. om. omelement; import Org. apache. axiom. om. omfactory; import Org. apache. axiom. om. omnamespac

. setsubject ("Java mail test"); // TitleEmail. setcharset ("gb2312"); // sets charsetEmail. setmsg ("this is a test email sent by the Java program with an attachment. "); // Content// Embed the image and get the content IDURL;Url = new URL ("http://img.baidu.com/img/image/ilogob.gif ");String cid = Email. Embed (URL, "Baidu logo ");Email. sethtmlmsg ("Email. Send (); // sendSystem. Out. println ("email sen

There are two ways to create a new class that can have a thread running within it. one way is to extend the Thread class. the other is to extend any class and implement the Runnable interface. for the sake of authentication, extending Thread is the simplest approach and is initially used in this book. implementing the Runnable interface tends to work much better in the real world; this technique is introduced in Chapter 4, "Implementing Runnable Versus Extending Thread." There are two ways to cr

For example, the following three packages are required for sending emails in Java. Activation-1.1.jar, Commons-email-1.1.jar, Mail-1.4.jar These three jar packages can be directly downloaded online. Javamail 1.4.3Http://www.oracle.com/technetwork/java/index-138643.html JavaBeans activation framework 1.1.1Http://www.oracle.com/technetwork/

A small example of how to convert a floating point to a Renminbi in java. Copy codeThe Code is as follows:Import java. util. ArrayList;Import java. util. List;Public class RMBConverter2 implements IRMBConverter {Private static final String [] RMB _NUMBER = {"zero", "one", "two", "three", "Si", "Wu", "Lu ", "identifier"

Java programming example of recursive and non-recursive code with two distributions, two Recursion The main content of this article is recursive and non-Recursive Implementation of the binary distribution of Java programming. Source: Exercise 27: return (1.1-p) * binomial (N-1, k, p) + p * binomial (N-1, k-1, k-1, p );How does the recursive formula calculate the

Java study note 7 (simple supermarket inventory management system example ), With the previous knowledge, you can simply build a supermarket inventory management system: Define a product category: public class FruitItem { int ID; String name; double price; int number; double money;} Then: Import java. util. arrayList; import

Link Address: http://blog.csdn.net/benweizhu/article/details/6615542Server-side (server) non-threading[Java]View PlainCopy Package com.zeph.serverclient; Import Java.io.BufferedReader; Import java.io.IOException; Import Java.io.InputStreamReader; Import Java.io.PrintWriter; Import Java.net.ServerSocket; Import Java.net.Socket; Public class MyServer { public static void Main (string[] args) throws IOException { ServerSock

The regular expression defines the link:Http://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html#sumApplication Examples: Count the number of words in a Java string public class Nn {public static void Main (string[] args) {String str= "This is a process";System.out.println (Str.split ("\\s+"). length);} Get all uppercase letters, lowercase letters, and numbers inside the

A simple example of Javascript and Java to obtain various form information This article mainly introduces simple examples for Javascript and Java to obtain various form information. If you need some help, please refer to them. We all know that multiple input forms are used when submitting the form. However, it is easy to use Document. getElementById to obtain ea

Xml is a special data storage format in plain text format. xml is often used for various data api interactions and data exchange before different scripts, let's take a look at a simple example of java reading xml files. The XML file is as follows: The Code is as follows: Copy code The java xml reading class is as follows: