java in nutshell

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Learning java Article 1: Building a java platform (java se)

Computer System: Windows 8 Here we will introduce three versions of the java platform: Java SE -- Java Standard Edition, Java Standard Edition, is mainly used for table-level application and database development. Java EE-Java Ente

Java Memory recovery mechanism--GC mechanism

First, Java GC concept DescriptionJava GC (Garbage Collection, garbage collection, garbage collector) mechanism, is one of the main differences between Java and C++/C, as a Java developer, generally do not need to specifically write memory recycling and garbage cleanup code, memory leaks and overflow problems, Nor does it need to be as jittery as C programmers. T

JAVA Learning (1): Java introduction, configuration and Setup of its platform and development environment, and java Construction

JAVA Learning (1): Java introduction, configuration and Setup of its platform and development environment, and java ConstructionJava introduction, platform, and development environment configuration and Setup1. Introduction to JavaJava is an object-oriented programming language with many features such as cross-platform, portable, distributed, simple, and scalable

On the difference between Java SE, Java EE and Java Me

1. Java SE (Java platform,standard Edition). Java SE was formerly known as J2SE. It allows you to develop and deploy Java applications that are used in desktops, servers, embedded environments, and live environments. Java SE contains classes that support

Simple to say the difference between Java SE, Java EE, Java me three _java

1. Java SE (Java platform,standard Edition). Java SE was formerly known as J2SE. It allows development and deployment on the desktop, Java applications used in servers, embedded environments, and live environments. Java SE contains classes that support

What are EE, java SE, Java EE, Java Me?__java

Currently, there are 3 versions of the Java 2 platform, which are Java 2 platform Micro (Java 2 Platform Micro edition,j2me) for small devices and smart cards, Java 2 Platform Standard Edition for desktop systems (Java 2 Platform Standard edition,j2se),

What is Java? What can Java do?

What is Java?Java is both a programming language and a platform.  Java programming languageJava is a high-level programming language with the following characteristics:SimpleObject orientedcan be distributedCan explainStrongSecurityStructure ofLightPowerful featuresMultithreadingDynamicJava can be either compiled or interpreted. With the compiler, you can transla

Java Memory Model-JMM (Java Memory Model) and java-jmm

Java Memory Model-JMM (Java Memory Model) and java-jmm In concurrent programming, what mechanisms are used between multiple threads for Communication (information exchange) and Data Synchronization? In Java, the shared memory model is used to implement information exchange and data synchronization between multiple thre

[Java] 14 kinds of Java development tools reviews _JSP Programming

In the history of computer development language, there is never a language like Java, such as the support of so many vendors, there are so many development tools, Java rookie as ever into the Grand View garden of Grandma Liu, look at the flower eyes, I do not know what choice. Indeed, these tools have their own strengths, there is no absolute perfect, even the veteran also difficult to make a choice. In thi

Java learning diary-1 Set Java environment variables and so on, java environment variables

Java learning diary-1 Set Java environment variables and so on, java environment variables I. Setting Environment Variables After jdk is installed, You need to configure the environment variables and find [my computer]-[properties]-[advanced]-[environment variables] Three environment variables need to be configured here 1. Create a system variable JAVA_HOME. The

Java Learning Path (ii) book chapter

nutshell,2nd Edition (for C + + background)", and I have not read these two books. In fact, I think the electronic industry publishing house "Java 2 programming detailed" or "Java 2 from the introduction to proficient" is very good. Of all the Java books, the most useful is not O ' Reilly's

The connections and differences between Java SE, Java EE, and Java Me

There are three versions of the Java platform, which enables software developers, service providers, and device manufacturers to develop for specific markets: * Java SE (Java platform,standard Edition). Java SE was formerly known as J2SE.It allows you to develop and deploy Java

Pseudo-Share and cache row padding, from Java 6, Java 7 to Java 8

About the pseudo-share of the article has been many, for multithreaded programming, especially the multi-threaded processing lists and arrays, we should pay great attention to the problem of pseudo-sharing. Otherwise, not only can not play the advantages of multithreading, but also may be worse than single-threaded performance. With the Java version of the update, then the different versions of the practice of reducing pseudo-sharing are different, ac

Java Learning Path (ii), book articles

To learn a new knowledge cannot be expected to read only one book, or two books can be fully mastered. There needs to be a step-by-step reading process. I recommend the OReilly published Java series books. here I just want to add that a lot of people learn Java from the book "Thinking in Java," but I don't think this book is for beginners. I think the correct

[Java SE] how to install JDK and configure the Java Runtime Environment, JDK Java

[Java SE] how to install JDK and configure the Java Runtime Environment, JDK JavaAbstract: no matter how hard it is to be used as a Java code farmer or a high-end Java System Architect, if JDK is not installed or the Java Runtime Environment is configured, it will be difficu

Java First Lesson: introduction

Environment: JRE (JAva Runtime Environment Java Runtime Environment) Including the core class libraries required for Java virtual machines and Java programs, if you want a well-developed Java program, you only need to install the JRE on your

Gold three silver Four Java interview Clearance Essentials Summary set (Daniel Induction)

MVC?Before we answer, let's look at the principles of design. Single duty, open and close principle, interface-oriented programming, the least known object. In a nutshell: "High cohesion, low coupling." Six characters a comma.Models (model layer): General storage processing logic,View Layer: Store html,jsp, fileController (Control layer): mainly responsible for scheduling the two, to achieve decoupling.When we send a request like a browser, we first

Java ---- use regular expressions to match keywords in Java source code, java ---- Regular Expressions

Java ---- use regular expressions to match keywords in Java source code, java ---- Regular Expressions Write this blog to learn the regular expressions in Java systematically. Another reason is that there was a problem that could not be solved. I had a reverse match and I couldn't stand it myself. However, as a code mo

Groovy Learning Notes (ii)-from Java to groovy

not need to return to multi-valued and built a strange class)8. By using as and Astype, the code block can be passed directly as an interface implementation9. More convenient loops such as for (I in 0..100) {}10, static import, import static methods (similar to Python, you can use as to create aliases), directly through the method name reference11. No type-checking paradigm at compile time (groovy only infers at run time, inference fails and throws exception)12. Annotations similar to Lombok13.

Memory composition of the Java Virtual machine and introduction to heap memory

first, the Java memory composition is introduced:堆(Heap)And非堆(Non-heap)Memory According to the official statement, "Java virtual machines have a heap, the heap is a runtime data region, and all class instances and arrays of memory are allocated from here." The heap is created when the Java virtual machine is Started. "" the memory outside the heap in the

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