Multithreading - thread pool

Thread pool

Thread pool idea
Create many threads ahead of time , Put it in the thread pool , Direct access during use , Put it back into the pool after use ;
It can avoid repeated creation and destruction , Achieve reuse ;
benefits
1, Improve response time , Reduce the time to create new threads
2, Reduce resource consumption , Reuse threads in the thread pool , You don't need to create... Every time
3, Easy to thread pipeline
corePoolSize : Core pool size

package TestThreadCommunication;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

// Test thread pool 
public class TestThreadPool {
    
    public static void main(String[] args) {
    

        //1, Creating a thread pool 
        //newFixedThreadPool The parameter is the thread pool size 
        ExecutorService service= Executors.newFixedThreadPool(10);

        service.execute(new MyThread());
        service.execute(new MyThread());
        service.execute(new MyThread());
        service.execute(new MyThread());

        //2, Close the connection 
        service.shutdown();
    }
}
class MyThread implements Runnable{
    

    @Override
    public void run() {
    
            System.out.println(Thread.currentThread().getName());
    }
}