Java使用Callable接口实现多线程的实例代码

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();
    }
}

package call;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;
//匿名类部类实现Callable接口创建子线程
public class AnonyCallable {
    public static void main(String[] args) {
    Callable<String> cl = new Callable<String>() {
    @Override
    public String call() throws Exception {
            System.out.println(Thread.currentThread().getName() + "正在行军~~~");
            System.out.println(Thread.currentThread().getName() + "遭遇敌军~~~");
            System.out.println(Thread.currentThread().getName() + "奋勇杀敌！！！！");
            return "战斗胜利，俘虏敌军50000人";
            }
};
        FutureTask<String> ft = new FutureTask(cl);
        new Thread(ft, "李存孝部队").start();
try {
        Thread.currentThread().setName("李存勖部队");
        Thread.sleep(3000);
        System.out.println(Thread.currentThread().getName() + "休整3000ms");
} catch (InterruptedException e) {
    e.printStackTrace();
}
    System.out.println(Thread.currentThread().getName() + "整顿完毕，等待友军消息...");
try {
            String str = ft.get();
            System.out.println("李存勖部队得知友军消息为：" + str);
} catch (InterruptedException | ExecutionException e) {
    e.printStackTrace();
    }
}
}