Java AtomicInteger Example
Learn Java AtomicInteger with simple examples, tested on Java 25. See why a normal int breaks with threads, and how incrementAndGet, compareAndSet and updateAndGet fix it.
Java Virtual Threads Example
Learn Java virtual threads with simple, runnable examples on Java 25. Start one virtual thread, run 10,000 tasks at once, and see how virtual threads fix a slow thread pool without rewriting your code.
Java ProcessBuilder examples
In Java, we can use ProcessBuilder to call external commands easily : ProcessBuilder processBuilder = new ProcessBuilder(); // — Linux — // Run a shell command processBuilder.command("bash", "-c", "ls /home/mkyong/"); // Run a shell script processBuilder.command("path/to/hello.sh"); // — Windows — // Run a command processBuilder.command("cmd.exe", "/c", "dir C:\\Users\\mkyong"); // Run a bat file processBuilder.command("C:\\Users\\mkyong\\hello.bat"); Process […]
Java BlockingQueue examples
In Java, we can use BlockingQueue to create a queue which shared by both producer and the consumer. Producer – Generate data and put it into the queue. Consumer – Remove the data from the queue. Note Read this article to understand what is producer and consumer. The BlockingQueue implementations are thread-safe, safely be used […]
Java Semaphore examples
In Java, we can use Semaphore to limit the number of threads to access a certain resource. 1. What is Semaphore? In short, a semaphore maintains a set of permits (tickets), each acquire() will take a permit (ticket) from semaphore, each release() will return back the permit (ticket) back to the semaphore. If permits (tickets) […]
Java Thread – Mutex and Semaphore example
Java multi threads example to show you how to use Semaphore and Mutex to limit the number of threads to access resources. Semaphores – Restrict the number of threads that can access a resource. Example, limit max 10 connections to access a file simultaneously. Mutex – Only one thread to access a resource at once. […]
Review : Java 7 Concurrency Cookbook
The Java 7 Concurrency Cookbook, containing over 60 examples show you how to do multithreaded programming in Java. It shows varies threading topics from beginner level to advanced level, including thread management like create, interrupt and monitor thread, using Java 5 Executor frameworks to run or schedule threads, and the latest Java 7 fork/Join Frameworks […]
Spring and Java Thread example
Here are 3 examples to show you how to do “threading” in Spring. See the code for self-explanatory. 1. Spring + Java Threads example Create a simple Java thread by extending Thread, and managed by Spring’s container via @Component. The bean scope must be “prototype“, so that each request will return a new instance, to […]