Java

An internal class overview An inner class (Inner Class) is a class that is defined in another class. Corresponding to this, the class containing the inner class is called the outer class.The main functions of the inner class are as follows:A inner

The first part--Quanzhang overview12th Chapter-Introduction to the Spring FrameworkIntroduction to the 12.1Spring framework12.1.1 inversion control and dependency injection12.2 Plane-oriented programming12.1.3 data access and transaction management12

Access to Windows shared directory with username and password protection in Java programs posted on 2015-11-20 14:03 Cloud self-water self-free reading (3744) Comments (0) Edit Favorites -->Accessing a directory with full read and write permissions

Java NiO channels are similar to streams, but are somewhat different: The data can be read from the channel, and the data can be written to the channel. But stream reads and writes are usually one-way. Channels can be read and written

There are three types of Java transactions:JDBC Transaction, JTA (Java Transaction API) transaction, container transaction. 1. JDBC TransactionThe JDBC transaction is controlled with the Connection object. The JDBC Connection Interface

(a) Basic data type: A value is passed, and the method does not change the value of the argument.[Java]View PlainCopy Public class Testfun { Public static void Testint (int i) { i=5; } Public static void Main (string[]

ObjectiveThe previous article explained in detail how to install the virtual machine +linux system in a Windows environment and successfully deployed the JDK.But after we deployed the JDK, we judged that the success of the deployment was based on

------------------------------------------------------------------------------------------------------------　　　　/** First way: Inherit the thread class* 1. Define a class, and then let the class inherit the thread class* 2. Overriding the Run

/** Object-oriented features: Polymorphism * 1. Polymorphism can be understood as multiple manifestations of a thing * 1) method overloading and rewriting * 2) Subclass Object Polymorphism (Main) * 2. Prerequisites for the polymorphism of the

In the previous post Javase Getting Started Learning 3: Building a Java Development environment (a) the way we configured the path variable,Two configuration methods, this configuration is necessary.PATH environment variable configuration mode 2Why

• Exceptions: In the Java language, abnormal conditions that occur in program execution are referred to as "exceptions". (Syntax errors and logic errors during development are not exceptions) · The exception events that occur during the execution of

"Turn" to preach Wisdom podcast Chengdu Java Training Center student notes. Threads:the static int max_priority thread can have the highest priority. the static int min_priority the lowest priority that the thread can have. int norm_priority The

Date Calendar Public classTestDate {PrivateDate date; Calendar Calendar; Publictestdate () {//date = new Date (); //Date date2 = new Date (); //System.out.println (Date.after (Date2));//is date more than date2

Alas, the front has been skipped, a look at the pure text description on the headache.This section is about Java data types, there are eight basic types, of which the int,short,long,byte four are shaped, is pure numbers, the size is 4,2,8,1 bytes, a

When publishing Android projects with Cocos2d-x. Should know that it involves JNI operations (Java Native Interface) in order to interact with C + + in Java. JNI is a common interface for Java. Designed to localize languages, such as c\c++, to

Interface: Initial understanding can be thought of as a special abstract classWhen a method in an abstract class is abstract, the class can be represented by an interface.Class is used to define classesInterface for defining interfacesWhen the

Java Control statements-break and continue, javabreakcontinue In the main part of any loop statement, break can be used to control the loop process. BreakIt is used to forcibly exit the loop without executing the remaining statements in the

Java Virtual Machine-garbage collection algorithm, java garbage collection This article mainly introduces the garbage collection algorithm of Java virtual machine.I. Overview Ii. Mark-clear Algorithm Mark-Sweep. Like the name, the algorithm is

Spring Boot logging SLF4J To print the content during development, use System. out. println () and Log4j should be the human Bypass Method.In fact, we do not recommend using System. out during development because a large amount of System. out will

Spring Boot starts to load data CommandLineRunner In practical applications, we need to load some data or do some things when the project service starts.To solve this problem, Spring Boot provides us with a method to implement it through the