core java online course

Transferred from: https://www.oschina.net/question/3756233_2277445Multi-line threads for other Java knowledge points, there is a certain threshold for learning, and it is more difficult to understand. In peacetime work if improper use will appear data confusion, inefficient execution (as a single-threaded to run) or deadlock program hangs and so on, so mastering the understanding of multithreading is critical.From the beginning of the basic concept to

The core technology composition of the Java EEThe cornerstone of EJB-J2EECorba-orb is its coreRmiJspJava ServletJavaBeanJdbcJmsJtaEJB OverviewEJB model FeaturesCreate and manage EJBs at run time by an EJB containerCustomizing how EJBs are run when they are deployedClient-side access coordinated by EJB container and serverCan be deployed to any compatible EJB containerThe client view of the EJB is determined

1. PrefaceRecently, I've seen several interesting questions about the Java Core class string. The string class is how to implement its immutable attributes, and the benefits of being designed to be immutable. Why is it not recommended to use the + sign to form a new string, it is recommended to use StringBuilder or StringBuffer. Flip through some of the

Download address: Network disk download Introduction to the content One of the most influential and valuable works in the Java field, with more than 20 years of experience in teaching and research of senior Java technology experts to write (won the Jolt Award), and "Java Programming ideas," the same as the more than 10-year global best-selling not decline, popul

platforms more difficult, in addition, not all developers of CORBA products support all platforms, and almost all platforms support Java virtual machines. Therefore, Java RMI has higher portability. If both the customer object and service object are based on the Java Virtual Machine, Java RMI is the best choice for Di

process is a layer of constantly abstract process, then the most detailed products appear general.And in the study of the specifications of the Java EE did not understand, why should have j2ee13 a specification, in the specification of the Code play what role? Is it a first-class standard? We are able to compare it with. NET,. NET is Microsoft's strategic product, and the description of the Java EE describ

extension mechanism also provides the ability to retrieve an optional package from a URL in an environment that is not already installed in the JDK or JRE. Use the custom API for all apps on the Java platform in a standard, extensible way.Learn about the optional extensibility mechanism see here: [What is the optional extensibility mechanism in Java][12] standard coverage mechanism (endorsed standards ov

Java EE was originally in the browser and the client machine. At the time, many people questioned whether it was suitable for server-side development. Now, with the increase in Third-party support for the JAVA2 platform Enterprise version, Java is widely accepted as one of the preferred platforms for developing enterprise server-side solutions. The Java EE pla

Java Core Technology Volume One Java base type Integral type Data Type Number of bytes range of Values Int 4 +_2^4*8-1 Short 2 +_2^2*8-1 Long 8 +_2^8*8-1 Byte 1 -128-127

1. JVM-related (includes features for each version)For those who have just come into contact with Java, the knowledge of the JVM does not necessarily need to be understood very deeply, there is some simple understanding of the concept.　　But for a veteran developer with more than 3 years of Java experience, the JVM is almost unacceptable. The JVM, as the basis for running

Multi-line threads for other Java knowledge points, there is a certain threshold for learning, and it is more difficult to understand. In peacetime work if improper use will appear data confusion, inefficient execution (as a single-threaded to run) or deadlock program hangs and so on, so mastering the understanding of multithreading is critical.From the beginning of the basic concept to the final concurrency model, this paper explains the knowledge of

Recommendation of Java multi-thread programming Core Technology I wrote this blog to recommend a book "Java multi-thread programming core technology" to yuanyou. It is recommended mainly because it is easy to understand and runs through the entire book as an example, so that the original abstract concepts are not abs

asynchronously, then under what circumstances with the Execute or Submmit method? such as multi-threaded parallel execution, do not need to execute the results returned when the general use of the Execute method, if the need for multi-threading parallel computation, and all need to return the results of the time, need to Submmit method, of course, submmit generally blocking, If you want to retrieve the results at the time set, if you do not get the e

For public classes, this may not be the case at the moment, but it can often help me in the future when I want to solve the solution. The following is Ali's collation of the Open class Absrtact: In the first Alibaba online summit, Alibaba middleware technology expert Wei Peng for everyone to bring the "Java container based multi-application deployment technology practice" to share, the main content of the