Java

Author: ChingOriginal address: http://blog.csdn.net/qingdujun/article/details/39322051This article demonstrates that TCP uses the socket for network communication, establishes a simple client, and uses the client to send a message to the server,

Java historySun's 1995 launch, secure, portable, cross-platform, was acquired by Oracle in 2009.Java architecture: SE standard EE enterprise version me mobileJava Cross-platform principle: Java source code--Compile--java bytecode

Polymorphic:The same entity has multiple forms at the same timeA compile-time type has a type that is used when declaring the variable, and the run-time type has an object that is actually assigned to the variable, and a polymorphic example occurs

Author: ChingOriginal address: http://blog.csdn.net/qingdujun/article/details/39341887This article demonstrates a simple multithreaded instance and simply parses the thread.When programming multiple threads, the general steps are:1) Inherit the

Package unit02;/** * * @time September 18, 2014 PM 10:29:48 * @porject Thinkinginjava * @author Kiwi */public class Test03 {privat E String getpathbypoint () {return This.getclass (). getClassLoader (). GetResource ("."). GetPath ();} Private String

Jmap can be used for reference:Official Document Http://docs.oracle.com/javase/6/docs/technotes/tools/share/jmap.htmland this blog http://blog.csdn.net/fenglibing/article/details/6411953This article mainly introduces several parameters commonly used

Author: ChingOriginal address: http://blog.csdn.net/qingdujun/article/details/39322051This article demonstrates that TCP uses the socket for network communication, establishes a simple client, and uses the client to send a message to the server,

Self-summary, what needs to be corrected to make up for the place, please point out, grateful!This paper summarizes the usage of indexof ,bigdecimal multiplication, shift operation ,formatted output of decimal, string substitutionOn the code:Test

/* This program mainly changes the Java interface style* The latter two MAC,CTK styles to be implemented on the relevant operating system*/Import java.awt.*;Import javax.swing.*;Import java.awt.event.*;public class Jframebutton extends JFrame

FinalFinal can modify classes, methods, variablesThe final decorated class cannot be inherited The final modified method cannot be overriddenThe final modified variable is a constant that can only be decorated onceInner classes can only access the

1. Define the interfaceUse interface to define an interface. Interface definition similar to the definition of the same, is also divided into the interface of the Declaration and interface body, where the interface body consists of a constant

Concise interpreter mode-2 Concise interpreter mode (5.3) continued This section describes a new expression language. User inputAlgebraic expressions, such as "(a * a + B) * (c-d )", The program calculates the correct result based on the priority

Learning from Hibernate -- Building a log4j log EnvironmentSLF4J supports multiple log systems, such as NOP, Simple, log4j, JDK 1.4 logging, JCL and logback. So what is the implementation principle of SLF4J? SLF4J it only provides one core slf4j api

Org. hibernate. LazyInitializationException: cocould not initialize proxy, couldnot Org. hibernate. LazyInitializationException: cocould not initialize proxy-no Session An error is reported when Hibernate is used for delayed loading because the

Hibernate Plugin-to-replicate Mappings Create a table: create table EMPLOYEE ( id INT NOT NULL auto_increment, first_name VARCHAR(20) default NULL, last_name VARCHAR(20) default NULL, salary INT default NULL, PRIMARY KEY

Longest public substringLongest Common Substring is a classic problem. Its basic description is "given two strings, find the Longest and the same Substring between them (consecutive) ". For example, the following two strings S and T have the longest

JAVA course 10 (Singleton design mode) Miscellaneous: If the methods in a class are static, there is no need to create objects. To prevent other programs from creating objects, You Can privatize the constructors of the current class. class

Adapter Pattern)Before the formal start, let's first think about a few questions: if the existing new project can use a lot of legacy code in the old project, are you planning to finish the new project from the beginning or understand the module

JVM Series II: JVM heap size suggestionsThe JVM heap size setting is a deep dive. It requires both a high degree of understanding and implementation of the architecture and a deep understanding and mastery of the internal language mechanism.First,

Jdk environment variable configuration In WindowsInstall and test the java Runtime Environment and implement HelloWorld. 1. Download j2sdk 1.6.0 _ 21 or later (http://java.sun. com, it is recommended to download its Java Documentation, which is the