import java.util.concurrent.Callable;import java.util.concurrent.ExecutionException;import java.util.concurrent.FutureTask;public class MyCallBack implements Callable<String>{    private String threadName;    public MyCallBack() {    }    public MyCallBack(String theadName) {        this.threadName = theadName;    }        public String call() throws Exception {        for (int i = 0; i < 100; i++) {            System.out.println(threadName+"===>\t"+i);        }        return threadName+"\t is over";    }    public static void main(String[] args) {        MyCallBack callBack = new MyCallBack("thread0");        FutureTask<String> taskList = new FutureTask<String>(callBack);        Thread t = new Thread(taskList);        t.start();        try {            for (int i = 0; i < 100; i++) {                System.out.println("thread1===>\t"+i);            }            while(!taskList.isDone()){                    System.out.println(taskList.get());            }        } catch (InterruptedException e) {            e.printStackTrace();        } catch (ExecutionException e) {            e.printStackTrace();        }    }    }