java concurrency course

Newkeyset. and the current version of the Concurrenthashmap is more suitable for cache, because it increases the check method when the key value does not exist. new classes in the Java.util.concurrent.atomic In order to compute count and sum concurrently, new Doubleaccumulator, Doubleadder, Longaccumulator, Longadder classes are introduced, providing a higher throughput rate than atomic. a new method of Java.util.concurrent.ForkJoinPool Static Commonpool () is added to provide a universal p

Java high concurrency programming (III), java concurrent programmingDirectory: 1. Several implementation methods of thread security Singleton Mode 2. Synchronize containers 3. Concurrent containersI. Several implementation methods of thread security Singleton Mode 1. Hungry Chinese style (synchronization lock is not used, and the typical space is used for time) p

inherit the class to create our own timed task and use the timer to schedule its execution.What is the difference between a synchronous collection in 14,java and a concurrent collection?Both synchronous and concurrent collections provide the appropriate thread-safe collection for multithreading and concurrency, although the concurrency collection is more extensi

threads, and when the first thread reads I=1, there is not a +1 operation to switch to the second thread, at which point the second thread reads the I=1. Then two threads follow up on the +1 operation, then after the assignment back, I is not 3, but 2. Obviously, there is inconsistency in the data. For example, the 32-bit JVM reads 64-bit long values and is not an atomic operation. Of course, a 32-bit JVM reading a 32-bit integer is an atomic operat

[JAVA concurrency] basic thread mechanism, java concurrent threadBasic thread Mechanism A program can be divided into multiple independent tasks, and each independent task can be executed by a thread; A process can contain several threads, that is, a number of concurrent tasks. When the program is running, the CPU time is divided into segments and allocated to al

Java Multithreading and Concurrency basics interview questions and AnswersOriginal link: http://ifeve.com/java-multi-threading-concurrency-interview-questions-with-answers/Multithreading and concurrency issues are among the questions that interviewers prefer to ask in a

Java Multithreading and Concurrency basics interview questions and AnswersOriginal link: http://ifeve.com/java-multi-threading-concurrency-interview-questions-with-answers/Multithreading and concurrency issues are among the questions that interviewers prefer to ask in a

java multithreading and Concurrency basics interview questions and Answers Multithreading and concurrency issues are among the questions that interviewers prefer to ask in a Java technology interview. Here, the most important questions are listed from the interview point of view, but you should still have a solid grasp

Java Multithreading and Concurrency basics interview questions and AnswersOriginal link: http://ifeve.com/java-multi-threading-concurrency-interview-questions-with-answers/Multithreading and concurrency issues are among the questions that interviewers prefer to ask in a

The introduction of multithreading concept is one of the embodiment of the effective compaction of the Zhai computer, and this is also very necessary, because the general operation of the process involves the reading of data, such as from disk, other systems, databases, CPU speed and data read speed has a serious imbalance, During the execution of a thread, a number of nodes will become blocked, making the calculation inefficient. In addition, the server side is the domain of

Common solutions for Java high concurrency and java Solutions Common solutions for high concurrency in Java 1. ConcurrencyWhat is high concurrency? In the Internet era, high concurrency