执行线程任务的写法有哪几种？

柔光的暖阳◎ 2024-02-05 20:38 148阅读 0赞

import java.util.concurrent.Callable;
    import java.util.concurrent.ExecutionException;
    import java.util.concurrent.FutureTask;
    
    /**继承Thread*/
    public class ThreadDemo extends Thread{
        public static void main(String[] args) {
            ThreadDemo threadDemo = new ThreadDemo();
            /**ThreadDemo继承了Thread类，可以调用Thread类的start()*/
            threadDemo.start();
            /**等同于 new ThreadDemo().start();*/
        }
        public void run() {
            System.out.println("马冬梅");
        }
    }
    
    /**实现Runnable类*/
    public class ThreadDemo implements Runnable{
        public static void main(String[] args) {
            /**底层还是要调用Thread类*/
            new Thread(new ThreadDemo()).start();
        }
        /**重写run()方法*/
        @Override
        public void run() {
            System.out.println("马冬梅");
        }
    }
    
    /**匿名内部类*/
    public class ThreadDemo {
        public static void main(String[] args) {
            new Thread(new Runnable() {
                @Override
                public void run() {
                    System.out.println("马冬梅");
                }
            }).start();
        }
    }
    
    /**Callable方法*/
    public class ThreadDemo implements Callable<String> {
        public static void main(String[] args) throws ExecutionException, InterruptedException {
            FutureTask<String> stringFutureTask = new FutureTask<>(new ThreadDemo());
            Thread thread = new Thread(stringFutureTask);
            thread.start();
            /**输出 马冬梅 */
            String result = stringFutureTask.get();
            System.out.println(result);
            /**输出 Thread-0 */
            /*String name = thread.getName();*/
            /*System.out.println(name);*/
        }
    
        @Override
        public String call() throws Exception {
            return "马冬梅";
        }
    }