java callable 等待_Java 如何让主线程不阻塞的等待结果，而是去执行其他任务，等到子线程执行完以后通知主线程？...

javapackage test;

import java.util.concurrent.Callable;

import java.util.concurrent.ExecutionException;

import java.util.concurrent.FutureTask;

public class Main {

public static class MyCallable implements Callable {

public Integer call() throws Exception {

Thread.sleep(10000);

return 1;

}

}

public static void main(String[] args) {

MyCallable callable = new MyCallable();

FutureTask task = new FutureTask(callable);

Thread t = new Thread(task);

try {

t.start();

System.out.println(task.get());

System.out.println("here");

} catch (InterruptedException e) {

e.printStackTrace();

} catch (ExecutionException e) {

e.printStackTrace();

}

}

}