Java线程池用法实战案例分析

import java.util.concurrent.*;
public class executorDemo
{
  public static void main( String[] args )
  {    
    ExecutorService executor = Executors.newSingleThreadExecutor();
    executor.submit(() -> {
      String threadName = Thread.currentThread().getName();
      System.out.println("Hello " + threadName);
    }); 
  }
}

import java.util.concurrent.*;
public class executorShutdownDemo {
  public static void main( String[] args ) {
    ExecutorService executor = Executors.newSingleThreadExecutor();
    executor.submit(() -> {
      String threadName = Thread.currentThread().getName();
      System.out.println("Hello " + threadName);
    });
    try {
      TimeUnit.SECONDS.sleep(3);
      System.out.println("尝试关闭线程执行器...");
      executor.shutdown();
      executor.awaitTermination(5, TimeUnit.SECONDS);
    } catch (InterruptedException e) {
      System.err.println("关闭任务被中断！");
    } finally {
      if (!executor.isTerminated()) {
        System.err.println("取消未完成的任务");
        executor.shutdownNow();
      }
      System.out.println("任务关闭完成");
    }
  }
}