Java

It is only four months from the end of the junior year, and I will devote more time and energy to the study of software testing in the four months. For Java EE This course, I want to master some basic applications.1. In Java Servlets, understand the

Reprint: JVM Series---a pure smileAddress: http://www.ityouknow.com/jvm.html1. What is class loadingClass loading refers to reading the binary data in the class's. class file into memory, placing it in the method area of the run-time data area, and

1) Four types of integers (byte, short, int, long): byte:8 bits, used to represent the smallest data units, such as data in files, -128~127 short:16 bits, rarely used, -32768 to 32767 int:32 bits, most commonly used, -2^ 31-1~2^31 (2.1 billion) long:

Packagecom.swift.test01;/*There are four kinds of fruits (apples, bananas, watermelon, oranges) 1, to each kind of fruit set a product number, product number is 8 0-9 random number, the product number can not be duplicated, the minimum value "0000000

Java byte code Javap-c. class files can be bytecode- Discussion https://www.zhihu.com/question/27831730 Stack and local variable operations Press the constant into the stack's instruction Aconst_null to press the null object

The following configuration is primarily for the generational garbage collection algorithm.One, heap size settingsThe setting of the young generation is criticalThe maximum heap size in the JVM has three limitations: the data Model (32-BT or 64-bit)

I am a Java developer, hibernate, and MyBatis have studied, have been asked in the Java interview, also used in project practice, Now to hibernate and MyBatis to do a contrast, so that everyone better understanding and learning, so that they do in

Reference articles1:http://blog.csdn.net/clemontine/article/details/530113622:http://www.jb51.net/article/98456.htmhttp://blog.csdn.net/javawebrookie/article/details/49560643Parsing XML in 1.DOM modeDom parsing is an XML file loaded into memory,

1: Deploy a good project, start Tomcat appears the following error, Baidu method, quite a lot of, but it does not seem to solve my problem, the problem is as follows:1 java.util.zip.ZipException:invalid LOC Header (bad signature)2 At

Inner class concept: As the name implies, a class is defined inside another class. The inner class is called an inner class.The main features of the inner class are:1. Inner classes can be very well hidden and can use protected, private modifiers.2.

Form form submitted in Chinese garbled (foreground Chinese to Java background garbled) problem and solve a problem:The Chinese content in the page input box is garbled in the background, which causes the search function to fail; (see reproduced in

Introduction to Java's collection framework system and java framework systemFunctions of collection classes A collection class is also called a container class. Like an array, it is used to store data. However, the array type is single, the length

Java operation Properties file introduction, javapropertiesIntroduction to the Properties file for Java operationsOverview During Java programming, we often need to create some configuration files inside or outside the project to maintain some basic

Based on the Servlet summary in the javaWeb stage, the servlet in the javaweb stage 1. Servlet OverviewServlet is a server program written in Java. It uses the request-response mode to provide Web services and supports standard ServletAPI. Servlet

ReentrantLock source code analysis for Java concurrent Series Before Java5.0, only synchronized and volatile can be used to coordinate access to shared objects. We know that the synchronized keyword implements the built-in lock, while the volatile

Java solves the problem of garbled file names and java garbled characters when downloading files from IE browsers. /*** Differentiate ie from other browsers for garbled download files * @ param request * @ param fileName * @ return */public String

Guava Preconditions tool parameter pre-check, guavapreconditions Preconditions is a tool class provided by guava for code verification. It provides many important static verification methods. It is used to simplify code verification or preprocessing

JAVAEE--BOS logistics project 05: OCUpload, POI, pinyin4J, refactoring paging code, partition addition, combobox, javaeeocupload1Learning plan 1. Implement the regional import function N OCUpload one-Click Upload plug-in N upload files to

Struts2 Framework Study Notes 2: detailed configuration, struts2 Study Notes Core configuration file: /hello. jsp   Introduce other configuration files: Relative Path under src   Constant Configuration: There is a default properties

Java internal class, Java Package innerclass; // in Java, a class can be defined in another class or method. Such a class is called an internal class. In a broad sense, internal classes generally include the following four types: member Internal