Java异步执行任务常用方式FutureTask和ExecutorService

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1，ExecutorService结合线程池

package com.asyn;

import java.util.Date;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ExecutorServiceTest {

	private static ExecutorService executor = Executors.newFixedThreadPool(1);

	public static void main(String[] args) {
		asynTask();
		synTask();
		System.out.println(new Date() + " 主线程执行结束");
	}

	/**
	 * 异步执行的方法
	 */
	public static void asynTask() {
		executor.execute(new Runnable() {
			public void run() {
				try {
					// 模拟异步方法执行的过程，耗时10秒
					Thread.sleep(10000);
					System.out.println(new Date() + " 异步方法执行结束");
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		});
		executor.shutdown();
	}

	/**
	 * 同步执行的方法
	 */
	public static void synTask() {
		System.out.println(new Date() + " 同步方法执行结束");
	}

}

运行结果：

2，FutureTask

package com.asyn;

import java.util.Date;
import java.util.concurrent.Callable;
import java.util.concurrent.FutureTask;

public class FutureTaskTest {

	public static void main(String[] args) {
		asynTask();
		synTask();
		System.out.println(new Date() + " 主线程执行完毕");
	}

	public static void asynTask() {
		FutureTask<Integer> task = new FutureTask<Integer>(new Callable<Integer>() {
			public Integer call() throws Exception {
				Thread.sleep(10000);
				System.out.println(new Date() + " 异步方法执行完毕");
				return 1;
			}
		});
		Thread thread = new Thread(task);
		thread.start();
	}
	
	public static void synTask() {
		System.out.println(new Date() + " 同步方法执行完毕");
	}

}

执行结果：