Java

PMD is an excellent tool for code checking of Java programs. It can check whether the Java code contains unused variables, whether they contain empty fetch blocks, whether they contain unnecessary objects, and so on.But in the course of use, you

Recently doing something strange that requires the Java application to be able to accept user-submitted scripts and execute, the network part I chose NANOHTTPD to provide basic HTTP server support, and in Java can host many scripting languages for a

Article transferred from May to Cangjie http://www.cnblogs.com/xrq730/p/5060921.htmlObjectiveJava Multi-threaded classification has written 21 multi-threaded articles, 21 Articles of a lot of content, personally think, learning, the more content,

Now there's a problem: ask for the first k minimum or maximum from multiple dataAnalysis: There are a variety of scenarios that can be implemented. First, the most easy to think about is to quickly sort the data, and then output the first k

Java as an object-oriented language with three major features (object-oriented core): Encapsulation inheritance polymorphism Encapsulation: It's packing, everything is packed. Inheritance: Subclasses can inherit from parent class

Java byte count to hexadecimal string representation design principle and implementation method When the lower four bits, the need to meet the high four bits all zero, and low four-bit unchanged, so &0x0f, so that the two conditions can be

 When connection is obtained, it will still verify that the server's certificate is trusted (issued by the Authority or signed by the Authority), as is the case with normal browser access, and if the server-side certificate is not trusted, the

Binary search, also known as binary lookup, is a highly efficient method of finding.Binary find the algorithm idea is to order the sequence (increment or decrement) arrangement, the search process using a jumping way to find, that is, the midpoint

import java.lang.reflect.field;import java.lang.reflect.method;import java.util.hashmap;import java.util.Map; Import Org.apache.log4j.Logger; Public classDomainequals {/** * Log Operation class*/ Private StaticLogger Logger = Logger.getlogger

This article provides a detailed overview of the Java technology topics in the threaded articleThe methods that are often used to write programs with multithreaded capabilities are:Run (), start (), Wait (), notify (), Notifyall (), sleep (), yield (

[Technical Documentation] Jeecg-P3 development environment to build entry (java Plug-in Development Framework)1. Project Description Jeecg-p3-web | start main project jeecg-p3-biz-demo | plug-in project Note: The

Spring entry --- JPA learning notes, --- jpa learning notes Spring, which has been used for a period of time, is now only in a usable state and does not know much about anything deeper. So I decided to start learning Spring in depth. This document

Sort out quick plug-ins for Java projects and java Projects In the JavaEE project, when Tomcat containers are used for development, you often encounter the problem of modifying the source code to restart the Tomcat service, which wastes a lot of

Java heap memory ?? The heap in Java is the largest memory space managed by JVM. It is mainly used to store various types of instance objects.?? In Java, the heap is divided into two different regions: Young and Old ). The Young generation is

Tomcat server Learning 1: tomcat server Learning 1. server port configuration 1. All tomcat configuration files are in the conf folder. 2. How to modify the server port: File: server. xml 　　　　 3. tomcat server default port: 8080, changed to 80 for

Java BASICS (1. Identifiers), java identifiers 1. Identifiers: identifier Names of class, method and variable are used for class name, method name, variable name Begin with character, '_' or '$' the identifier cannot start with a number. Case

10 debugging skills that Java programmers should know and java programmer debugging skills The test can help identify and solve application defects. In this article, the author will use Eclipse, a common development tool, to debug Java applications.

Chapter 8 Redis database structure and read/write Principles, chapter 8 redis Note: This article mainly references Redis Design and Implementation 1. Database Structure The internal data structure of each redis Server is a redisDb []. The size of

[Spring practice series] (6) configure the Bean of the Spring IOC container1. IntroductionSpring provides a powerful IOC container to manage the beans that make up applications. To use the container service, you must configure the Bean running in

Java Virtual Machine (1) runtime data area 1. There is a "high wall" between Java and C ++ that is surrounded by the dynamic memory allocation and garbage collection technology. The people inside the wall want to go in, but they want to come up. 2.