Java多线程实现之Callable详解

package com.my.frame;
import java.util.concurrent.Callable;
public class ThreadCall implements Callable<String> {
    @Override
    public String call() throws Exception {
        // TODO Auto-generated method stub
        System.out.println("=====");
        return "9999";
    }
}
package com.my.frame;
import java.util.concurrent.FutureTask;
public class TestThread {
    public static void main(String[] args) {
        FutureTask<String> ft = new FutureTask<>(new ThreadCall());
        new Thread(ft).start();
    }
}

        Callable<String> callable = new Callable<String>() {
            @Override
            public String call() throws Exception {
                try {
                    Thread.sleep(1500);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                return "成功";
            }
        };
        ExecutorService executorService = Executors.newCachedThreadPool();
        Future<String> future = executorService.submit(callable);
        String result = null;
        try {
            result = future.get();
        } catch (ExecutionException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("result:" + result);