Java線程池用法實戰(zhàn)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("嘗試關(guān)閉線程執(zhí)行器...");
      executor.shutdown();
      executor.awaitTermination(5, TimeUnit.SECONDS);
    } catch (InterruptedException e) {
      System.err.println("關(guān)閉任務(wù)被中斷！");
    } finally {
      if (!executor.isTerminated()) {
        System.err.println("取消未完成的任務(wù)");
        executor.shutdownNow();
      }
      System.out.println("任務(wù)關(guān)閉完成");
    }
  }
}