MultiThreadRejectHandler.java

package com.honey;

import java.util.concurrent.*;

/**
 * Hello world!
 */
public class App {
    public static void main(String[] args) {

        BlockingQueue<Runnable> blockingQueue = new ArrayBlockingQueue<>(10);
        ExecutorService pool = new ThreadPoolExecutor(2, 2, 2, TimeUnit.SECONDS, blockingQueue, new ThreadPoolExecutor.CallerRunsPolicy());
        int count = 20;
        for (int i = 0; i < count; i++) {
            System.out.println("for "+ i +" start->"+System.currentTimeMillis());
            pool.submit(new AppRunnable(i));
            System.out.println("for " + i + " end  ->"+System.currentTimeMillis());
        }
        pool.shutdown();
    }

    static class AppRunnable implements Runnable {
        final int i;
        AppRunnable(int i) {
            this.i = i;
        }
        @Override
        public void run() {
            System.out.println(i+"->" + Thread.currentThread().getName());
            try {
                Thread.sleep(20L);
            } catch (InterruptedException e) {
                //ignore
            }
        }
    }
}