JAVA発令銃工具

発令銃
発令銃はN人の選手を準備し、準備を行い、選手全員が着席し、内部実現を開始する主にソースコードのstateによって実現され、volatileキーワード修飾(スレッド切り替え時に最新のデータを取得する)翠花上コード

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;

/**
 *     ，         
 * 1、       
 * 2、  doWork         
 * @author sloar,  [email protected]
 * @create 2019/9/16 18:11
 **/
public class CountDownLatchTest {

    // TODO        
    private static final int N = 10;

    public static void main(String rgs[]) throws InterruptedException {
        //     
        CountDownLatch doneSignal = new CountDownLatch(N);
        Executor service = Executors.newCachedThreadPool();
        for (int i = 0; i < N; ++i) // create and start threads
            service.execute(new WorkerRunnable(doneSignal, i));

        doneSignal.await();           // wait for all to finish


    }
}


class WorkerRunnable implements Runnable {
    private final CountDownLatch doneSignal;
    private final int i;
    WorkerRunnable(CountDownLatch doneSignal, int i) {
        this.doneSignal = doneSignal;
        this.i = i;
    }
    public void run() {
        doWork(i);
        doneSignal.countDown();
    }

    // TODO                  
    void doWork(int i) {
        System.out.println(i + "--->"+ Demo.getInstance());
    }
}