Java

The new company's first job is to invoke the WebService interface written by the previous. NET program in the Java environment.The interface returns a JSON-formatted dataBecause all said WebService cross-language, originally thought is a simple

One, memory overflow type 1. Java.lang.OutOfMemoryError:PermGen Space The JVM manages two types of memory, heap, and non-heap. The heap is intended for developers, and is created at the start of the JVM, and the non-heap is left to the JVM for its

Recently read the JVM source code, some of the experience as a blog to share, so they opened a new topic.The first article named when I was very confused, my code reading is starting from launcher, that is, Java.exe (if it is the Windows platform)

A The role of API packages, interfaces, exception handlingA package is a collection of classes and interfaces. Packages can be used to put common classes or functions similar classes in a package. The Java language provides a system package that

1, Ajax Fancy CapchaAn Ajax-enabled and stunning jQuery Captcha plugin that uses a very user-friendly authentication mechanism.?From:http://www.webdesignbeach.com/beachbar/ajax-fancy-captcha-jquery-plugin2. Java Generate verification Code2-1,

Reprint Please specify source: http://blog.csdn.net/lhy_ycu/article/details/39760895Factory method Mode (Factory )Factory method: As the name implies, is called the factory method to produce objects (products).There are 3 ways to implement factory

public class Basespoon implements cloneable {//spoon spoon, spoon string Name;public string GetName () {return name;} public void SetName (String name) {this.name = name;} @Overrideprotected Basespoon Clone () throws Clonenotsupportedexception

Transferred from: http://blog.csdn.net/wwww1988600/article/details/7309070There are two ways to implement multithreading in Java, one is to inherit the thread class, one to implement the Runnable interface, and the thread class to be defined in the

1.JDK the acquisition and installation Download the JDK and install it on the Oracle website, http://www.oracle.com/technetwork/java/javase/downloads/index.html such as Windows X64 Jdk-7u51-windows-x64.exe, which contains the JDK and JRE installed

The problem of deep copy and shallow copy is always encountered, here are some tests, the code is as follows:/* To change this template, choose Tools | Templates * and open the template in the editor. */import Java.io.bytearrayinputstream;import

Map stores data in the form of key/numeric pairs, and arrays are similar to indexes that exist in arrays, which are themselves objects.The interface of Mapmap---Implementation MapThe inner class of Map.entry--map, which describes the key/value pairs

Use the final keyword to do the following:. declaring a classWhen you use final to decorate a class, the class cannot be inheritedFinal class Example{int Value;public int getValue () {return value;}} The test here wants to inherit example, but

DownloadJDK1.6 in the past, the JDK was Sun's product, and now sun is being acquired by Oracle, saying that Oracle may have many readers who do not know that Oracle should be a household name. so to go to the official website download JDK,

Http://www.cnblogs.com/zhj5chengfeng/archive/2013/01/01/2841253.html%java_home%\bin;%java_home%\jre\bin; This is the one added to the path variable.The path variable would have been preceded by

We probably know that JS has a length function, and Java has the length function.CasesIf the array is data[], then data.lengthCode to copy code as followsbyte[] Phone =new byte[81]; Create an array of type byte with a length of 81Phone[i]!=0 in

Blocking queues:1) Blockingqueue This interface provides:Add ()/remove () If the queue has no data, fetch data from the queue, or the data in the queue is full,Adds data to the queue, an exception is thrown.Put ()/take () If the queue has no data,

Description: First introduced the Java Collection framework contains the interface and classes, and then summed up the collection framework of some basic knowledge and key points, and combined with examples for a simple analysis.1. OverviewAll

Java command line compilation and execution Program Before learning how to use java to use IDE, it is best to use the javac and java of the command line to run a simple program, so that you can familiarize yourself with the impact of package

Optimal matrix concatenation combined with Dynamic Programming1. introduction multi-matrix concatenation for general matrix multiplication, such as matrix A (m, n) and matrix B (n, p) the number of addition times required for multiplication is m * n

Java Design Pattern -------- factory method pattern of creation Pattern This article is my learning notes, welcome to reprint, but please note the Source: http://blog.csdn.net/jesson20121020 One problem with the simple factory model in the previous