Java

Why generics are required?Imagine that you need a simple container class, or a handle class, for example to store an apple basket, and you can do so simply:fruit{}fruit{}apple apple; public void set (this.apple;}} Such a simple basket would be

This article is mainly about documenting the Java exception handling mechanism (based on jdk1.7) and how to handle and design exceptions. Remember the original Java exception this piece of the time did not pay much attention to its use, thought is

Java garbage collection (garbage COLLECTION,GC)Java supports dynamic memory allocation, garbage collection, and C + + is not supported. I guess that's one of the reasons why Java is born out of C + +.History of the GCThe history of GC is much older

String is one of the most commonly used Java classes, sorting out some important string knowledge to share with everyone.As a novice Java programmer, it is necessary to have a deeper understanding of string. If you have a few years of Java

Java IO Stream Learning Summary one: input and output stream Reprint please indicate source: http://blog.csdn.net/zhaoyanjun6/article/details/54292148This article is from "Zhaoyan's blog" Java Flow class diagram structure:Concept and

In the development process, often many people are accustomed to use the new date () to get the current time, it is more convenient to use, but also to get the current time related to all aspects of information, such as get hours, minutes and so on,

Recently encountered a problem, to delete a collection of an element, how to solve? I wrote two pieces of code to delete, all reported a mistake java.util.ConcurrentModificationException; in order to make it more likely that the point of the program

Java.lang.Math: Absolute Value:static int abs (int a)Static long abs (long a)Static float abs (float a)static Double abs (double A) extremum:static int max (int a, int b)Static Long Max (long A, long B)static float Max (float A, float b)static

Lombok installation, getting started-eliminate lengthy Java codeObjective:Visit the open source community when the unintentional discovery, with a period of time, think can also, hereby recommended.LombokProvides a simple form of annotations to help

This article comes from an excerpt from the Java Web Lightweight Development Interview tutorial.Why choose this from a variety of Java books? Why buy this book when the current amount of network information is so large, instead of learning by

class variable : shape as static int A; As the name implies, a class variable can be understood as a variable of a class, and a class variable is allocated a memory space when the class is loaded, unlike an instance variable (int A; ), an instance

/*When the same functionality appears in multiple classes, but the functional body is different,This is available for upward extraction. At this point, only the function definition is extracted, not the functional body.Abstract: Can not

Java language for rabbit problem code analysis, java language for Rabbit 1. Thinking The rabbit problem is a visual representation of the February series. It is a question raised by a mathematician named ononacci in his book. 2. Description The

Analysis on single CPU usage of java application linux service 100%, javalinux In the previous project process, performance tests were performed on the linux server after the project was completed. When the Service ran, it was found that the cpu

Java advanced Virtual Machine Loading Mechanism and Java Virtual Machine Mechanism The Jvm needs to load a binary stream, either in the. class file format or in other forms. There is no major problem in designing according to its loading standards.  

Common pitfalls and traps for pure Socket (BIO) long link programming, socketbioThis article is purely a summary of my personal experience. The pseudocode is also coded on the whiteboard when I write an article. There may be logic problems. please

Java multithreading and concurrency model lock, java multithreading Model This is a long article that summarizes Java multi-threaded development. This article introduces the synchronized keyword from the beginning of Java, and discusses Java

14 skills for high-performance Java persistence, high-performance java A high-performance data access layer requires a lot of knowledge about the database, JDBC, JPA, and Hibernate. This article summarizes some important technologies that can be

Network multiline thread download and merge file example, multiline thread merge example In this example, I/O streams and multiple threads are used to download the same image. After the download is completed, the thread creation method is used to

Java advanced interview question list, java advanced interviewBasic concepts and core design ideas of Object-Oriented Programming This topic explains the polymorphism (polymorphism), encapsulation, cohesion, and coupling ). What is the difference