Java

1.JDBC (Javadatabase Connectivity)JDBC is an API that accesses the database in a uniform manner.It provides platform-independent database access, that is, with the JDBC API, we do not have to access the Oracle database to write a program

Overview Since the beginning of the JDK1.5, the syntactic sugar of automatic boxing/unpacking has been introduced, which makes the programmer's code more concise and eliminates the need for explicit conversions. Basic type and wrapper type under the

In one of the previous blogs I wrote about the sequence of initialization of programs in a class, but in Java object-oriented, there are still inheritance relationships between classes. So about the initialization order of the program, we can be

Part I: Course preparation sectionFill out the course study Platform Registration account: Platform Name Registered Account Blog Park: www.cnblogs.com The night sky Fu said Program Design

Part I: Course preparation sectionFill out the course study Platform Registration account, Platform Name Registered Account Blog Park: www.cnblogs.com https://www.cnblogs.com/Fairber/ Program

201771010112 Luosong the Object Oriented Programming (java) " first week study summaryPart I: Course preparation sectionFill out the course study Platform Registration account, Platform Name Registered Account Blog

Everyone makes mistakes, but some mistakes are so absurd that I can't figure out how to make such mistakes. Even more unexpectedly, this kind of thing happened to us. Of course, this kind of thing can only discover the truth afterwards. Next, I'll

The basic characteristics of Java Basic Learning Summary, the beginning of learning, is a metaphysical understanding, with more than 3 years, and then look back, it is quite logical to understandLanguage learning is probably such a law, learning,

JSON Goto XMLExt: 24804337XMLSerializer xmlserial = new XMLSerializer ();Jsonarray jsonobject = Jsonarray.fromobject (obj.tostring ());String XML = Xmlserial.write (Jsonobject);Note: Using XmlSerializer requires the introduction of XMO jar packages,

Packagetext;ImportJava.text.SimpleDateFormat;ImportJava.util.Calendar;ImportJava.util.Random;//Java Random Public classDemo { Public Static voidFirst (string[] args) {Random rand=NewRandom (); for(inti = 0; I ) { //System.out.println

In distributed development, lock is an important way of thread control. Java also provides 2 locking mechanisms for this, synchronized and lock. As a Java enthusiast, it is natural to compare these 2 mechanisms, but also to learn some of the areas

I. OverviewTalking about concurrency, having to talk about Reentrantlock, and talking about Reentrantlock, have to talk abstractqueuedsynchronized (AQS)!Class such as its name, abstract queue-type Synchronizer, AQS defines a set of multi-threaded

What is an internal classAn 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.Inner class action1. The inner class provides a better

working life:8 years service company: 4 (including the four major portals of two) recent occupation: Java architect Workplace keywords: social platform, high concurrency system architecture design, technical team management, a variety of products

Software: Program + dataSoftware Classification:By Application Range:System softwareApplication softwareAccording to whether the charge:Free software-Pay SoftwareBy whether Open Source:Open Source SoftwareClosed source softwareMemory

To understand the Java garbage collection mechanism, it is important to understand the JVM memory pattern first. Today we will understand the various parts of the JVM's memory, how to monitor it, and the garbage collection tuning.Java (JVM) memory

We have a lot of introduction to the framework of Java EE, this article will be used in Java EE Four framework to do a systematic induction, I hope you like.StrutsStruts is an MVC framework based on the Sun Java EE platform, implemented mainly by

1. Creation of objectsThe first virtual opportunity to a new instruction is to check whether the parameter of the directive can be positioned in the constant pool for the symbolic reference of a class, and to check whether the class represented by

1. Initial knowledge of LinkedListIn the previous article explained the ArrayList, this article explains the LinkedList realization.LinkedList is based on a linked list , so let's start by explaining what a list is. The list was originally a C/s + +

I. Program storage format Unified Program Storage Format: virtual machines on different platforms are uniformly using the program storage format-byte code (bytecode) in all platforms; The Java Virtual machine does not care about the