Callable And Future 研究

package cn.everest.thread;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

public class CallableAndFuture {
	
	public CallableAndFuture() {}

	public static void main(String[] args) {
		ExecutorService executorService = Executors.newSingleThreadExecutor();
		Future<String> future = executorService.submit(
			new Callable<String>() {
				@Override
				public String call() throws Exception {
					Thread.sleep(2000);
					return "hello";
				}
		});
		
		System.out.println("等待结果~~~~");
		try {
			String string = future.get();
			System.out.println("结果是：" + string);
		} catch (InterruptedException e) {
			e.printStackTrace();
		} catch (ExecutionException e) {
			e.printStackTrace();
		}
		
	} // end main
	
}