JAVA 线程 Callable 实现

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

public class 线程Callable实现 {
    public static void main(String[] args) {

        Callable callable = new MyCallable();

        FutureTask<String> futureTask = new FutureTask<>(callable);

        Thread thread = new Thread(futureTask);

        thread.start();

        try {
            System.out.println(futureTask.get());
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }
    }
}
class MyCallable implements Callable<String>{

    @Override
    public String call() throws Exception {
        int sum;
        sum = 1 + 1;
        return "1 + 1 = " + sum;
    }
}