一般的多线程创建

for(int i= 1;i<=2;i++){
            new Thread(new Runnable() {
                @Override
                public void run() {
                    for(int i= 0;i<10;i++){
                        System.out.println(Thread.currentThread().getName());
                    }
                   
                }
            }).start();
        }

线程池定义与结合lambada使用

public class ThreadPoolUtils {
    private static final ExecutorService threadPool;

    static {
        int corePoolSize = 30;
        int maxPoolSize = 40;
        long keepAliveTime = 5;
        TimeUnit keepAliveTimeUnit = TimeUnit.MINUTES;
        int queSize = 100_000;
        ThreadFactory threadFactory = new ThreadFactoryBuilder()
                .setNameFormat("ThreadPoolUtils")
                .build();

        threadPool = new ThreadPoolExecutor(corePoolSize, maxPoolSize,
                keepAliveTime, keepAliveTimeUnit, new ArrayBlockingQueue<>(queSize)
                , threadFactory);
    }


    /**
     * 获取线程池
     * @return 线程池
     */
    public static ExecutorService getThreadPool() {
        return threadPool;
    }

ExecutorService executor = ThreadPoolUtils.getThreadPool();
for(int i= 1;i<=2;i++){
        int finalI = i;
        executor.submit(()->{
            for(int i= 0;i<10;i++){
                        System.out.println(Thread.currentThread().getName());
                    }
           }
        });
} 
executor.shutdown();