使用java.util.concurrent.ExecutorService实现Java线程异步执行

Java异步执行方法：

首先搞个最简单线程实现Runnable接口

public class SimpleRunner implements Runnable
{
	int runIndex = 0;

	public void setRunIndex(int runIndex)
	{
		this.runIndex = runIndex;
	}

	public void run() 
	{
		try
		{
			//3秒内随机时间结束
			Thread.sleep((long) (Math.random() * 3000));
			System.out.println("start run:" + runIndex);
		} catch (InterruptedException e)
		{
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}
 
  
 
  
 
  
 然后再测试类中使用ExecutorService来异步执行 
  
 
  
 
  
public class SimpleSync
{
	// 可以容纳10个线程的执行器.
	final static ExecutorService exec = Executors.newFixedThreadPool(10);

	public static void main(String[] args)
	{
		System.out.println("Start first SYNC program.");

		//放进10个线程并行跑
		for (int i = 0; i < 10; i++)
		{
			SimpleRunner runner = new SimpleRunner();
			runner.setRunIndex(i);
			exec.submit(runner);
		}
		
		exec.shutdown();//关闭执行器
		
		System.out.println("Finish first SYNC program.");
	}
}
 
  
 
  
 
  
 执行一下就可以获得这样的结果： 
  
 
  
Start first SYNC program.
 Finish first SYNC program.
 start run:4
 start run:8
 start run:2
 start run:3
 start run:0
 start run:6
 start run:5
 start run:1
 start run:7
 start run:9
 
  

 
  
这样可以明显看出来线程是在异步执行的，测试类的main方法其实早已经走完了