The detailed explanation
The detailed explanation
Israfil Foundation is an open source Java class library that provides a set of powerful concurrent programming tools and data structures to make multi -threaded programming simpler and efficient.This article will introduce IsraFil Foundation Concurrency Classes in detail and provide some Java code examples.
ConcurrenThashMap class:
ConcurrenThashMap is a thread -safe hash table provided by Israfil Foundation.It is a substitute for HashMap and supports concurrent access.Unlike HashMap, ConcurrenThashmap uses lock separation technology to divide the entire table into multiple sections, which maintains a hash table in each paragraph.In this way, when multiple threads operate at the same time, they can independently access different sections to improve concurrency performance.
The following is a simple example of using ConcurrenThashMap:
import java.util.concurrent.ConcurrentHashMap;
public class ConcurrentHashMapExample {
public static void main(String[] args) {
ConcurrentHashMap<Integer, String> map = new ConcurrentHashMap<>();
map.put(1, "One");
map.put(2, "Two");
map.put(3, "Three");
map.forEach((key, value) -> System.out.println(key + " : " + value));
}
}
ConcurrentlinkedQueue class:
ConcurrentlinkedQueue is a non -blocking thread security queue.It is based on the linked list structure that supports high -efficiency concurrent entry and departure operations.ConcurrentlinkedQueue uses a cycle CAS (Compare and Swap) operation to achieve thread security.It does not implement the BlockingQueue interface, so it does not support blocking operations.
The following is a simple example of using ConcurrentLinkedQueue:
import java.util.concurrent.ConcurrentLinkedQueue;
public class ConcurrentLinkedQueueExample {
public static void main(String[] args) {
ConcurrentLinkedQueue<String> queue = new ConcurrentLinkedQueue<>();
queue.offer("One");
queue.offer("Two");
queue.offer("Three");
while (!queue.isEmpty()) {
System.out.println(queue.poll());
}
}
}
Countdownlatch class:
COUNTDOWLATCH is a synchronous auxiliary class that allows one or more threads to wait for other threads to complete the operation.Based on the principle of counting, it blocks threads by calling the AWAIT () method until the counter is 0.After each thread is completed, call the Countdown () method to minus the counter by 1.When the counter is 0, all the waiting threads will be awakened.
Here are a simple example of using countdownlatch:
import java.util.concurrent.CountDownLatch;
public class CountDownLatchExample {
public static void main(String[] args) throws InterruptedException {
CountDownLatch latch = new CountDownLatch(3);
Thread thread1 = new Thread(() -> {
System.out.println("Thread 1");
latch.countDown();
});
Thread thread2 = new Thread(() -> {
System.out.println("Thread 2");
latch.countDown();
});
Thread thread3 = new Thread(() -> {
System.out.println("Thread 3");
latch.countDown();
});
thread1.start();
thread2.start();
thread3.start();
latch.await();
System.out.println("All threads completed");
}
}
Through the above examples, we can see that countdownlatch allows multiple threads to execute parallel. Only when all threads are completed, the main thread will continue to execute.
This article introduces some commonly used classes in Israfil Foundation Concurrency Classes, and provides corresponding Java code examples.These classes provide convenient and efficient multi -threaded programming tools, allowing us to better use the concurrent characteristics of Java.When we need to develop multi -threaded applications, we can consider using these classes to improve the performance and concurrency of the program.
