网站建设演讲稿,网站建设与管理（第2版）,网页设计师需要掌握的领域,手机详情页设计模板文章目录1、创建一个类实现Runnable接口#xff0c;并重写run方法。2、创建一个类继承Thread类#xff0c;并重写run方法。3、实现Callable接口#xff0c;重写call()方法#xff0c;这种方式可以通过FutureTask获取任务执行的返回值。4、run()方法和start()方法有什么区别…
文章目录1、创建一个类实现Runnable接口并重写run方法。2、创建一个类继承Thread类并重写run方法。3、实现Callable接口重写call()方法这种方式可以通过FutureTask获取任务执行的返回值。4、run()方法和start()方法有什么区别5、通过继承 Thread 的方法和实现 Runnable 接口的方式创建多线程哪个好6、两种常见的线程控制方法1、创建一个类实现Runnable接口并重写run方法。
public class MyThread implements Runnable{ArrayListStringaaa;public MyThread(ArrayListStringaaa){this.aaaaaa;}Overridepublic void run() {for (int i0;i100;i){aaa.add(aaai);System.out.println(Thread.currentThread().getName()aaaiaaa.get(i));}}
}写一个测试方法
public class ListDemo {public static void main(String[] args) {ArrayListStringlistnew ArrayList();MyThread m1new MyThread(list);MyThread m2new MyThread(list);new Thread(m1).start();new Thread(m2).start();}
}-----结果------
Thread-0aaa0aaa0
Thread-1aaa0aaa0
Thread-0aaa1aaa0
Thread-1aaa1aaa0
Thread-0aaa2aaa1
Thread-1aaa2aaa1
Thread-0aaa3aaa1
Thread-1aaa3aaa1
Thread-0aaa4aaa2
Thread-1aaa4aaa2
Thread-0aaa5aaa2
Thread-1aaa5aaa2
Thread-1aaa6aaa3
Thread-1aaa7aaa3
Thread-0aaa6aaa3
Thread-1aaa8aaa4
Thread-1aaa9aaa4
Thread-0aaa7aaa3
Thread-1aaa10aaa5
Thread-0aaa8aaa4
Thread-1aaa11aaa5
Thread-0aaa9aaa4
Thread-1aaa12aaa6
Thread-1aaa13aaa6
Thread-0aaa10aaa5
Thread-1aaa14aaa7
Thread-0aaa11aaa5
Thread-1aaa15aaa8
Thread-0aaa12aaa6
Thread-1aaa16aaa7
Thread-0aaa13aaa6
Thread-1aaa17aaa9
Thread-0aaa14aaa7
Thread-1aaa18aaa10
Thread-0aaa15aaa8
Thread-1aaa19aaa8
Thread-0aaa16aaa7
Thread-0aaa17aaa9
Thread-0aaa18aaa10
Thread-0aaa19aaa8Process finished with exit code 0
2、创建一个类继承Thread类并重写run方法。
public class MyThread extends Thread{ArrayListStringaaa;public MyThread(ArrayListStringaaa){this.aaaaaa;}Overridepublic void run() {for (int i0;i20;i){aaa.add(aaai);System.out.println(Thread.currentThread().getName()aaaiaaa.get(i));}}
}------结果------
Thread-0aaa0null
Thread-1aaa0null
Thread-0aaa1aaa0
Thread-1aaa1aaa0
Thread-0aaa2aaa1
Thread-1aaa2aaa1
Thread-0aaa3aaa1
Thread-1aaa3aaa1
Thread-0aaa4aaa2
Thread-1aaa4aaa2
Thread-0aaa5aaa2
Thread-1aaa5aaa2
Thread-0aaa6aaa3
Thread-1aaa6aaa3
Thread-0aaa7aaa3
Thread-1aaa7aaa3
Thread-0aaa8aaa4
Thread-1aaa8aaa4
Thread-0aaa9aaa4
Thread-0aaa10aaa5
Thread-1aaa9aaa4
Thread-0aaa11aaa5
Thread-1aaa10aaa5
Thread-0aaa12aaa6
Thread-0aaa13aaa6
Thread-0aaa14aaa7
Thread-1aaa11aaa5
Thread-0aaa15aaa7
Thread-1aaa12aaa6
Thread-0aaa16aaa8
Thread-1aaa13aaa6
Thread-0aaa17aaa8
Thread-1aaa14aaa7
Thread-0aaa18aaa9
Thread-1aaa15aaa7
Thread-0aaa19aaa10
Thread-1aaa16aaa8
Thread-1aaa17aaa8
Thread-1aaa18aaa9
Thread-1aaa19aaa10Process finished with exit code 0
3、实现Callable接口重写call()方法这种方式可以通过FutureTask获取任务执行的返回值。
public class CallerTask implements CallableString {public String call() throws Exception {return Hello,i am running!;}public static void main(String[] args) {//创建异步任务FutureTaskString tasknew FutureTaskString(new CallerTask());//启动线程new Thread(task).start();try {//等待执行完成并获取返回结果String resulttask.get();System.out.println(result);} catch (InterruptedException e) {e.printStackTrace();} catch (ExecutionException e) {e.printStackTrace();}}
}
-----结果-----
Hello,i am running!4、run()方法和start()方法有什么区别
run()封装线程执行的代码直接调用相当于调用普通方法。 start()启动线程然后由JVM 调用此线程的 run() 方法。
5、通过继承 Thread 的方法和实现 Runnable 接口的方式创建多线程哪个好
实现Runable接口好原因有两个 ①、避免了Java单继承的局限性 ②、适合多个相同的程序代码去处理同一资源的情况把线程、代码和数据有效的分离更符合面向对象的设计思想。
6、两种常见的线程控制方法
sleep()使当前正在执行的线程暂停指定的毫秒数也就是进入休眠的状态。 需要注意的是sleep 的时候要对异常进行处理。
try {//sleep会发生异常要显示处理Thread.sleep(20);//暂停20毫秒
} catch (InterruptedException e) {e.printStackTrace();
}
join()等待这个线程执行完才会轮到后续线程得到cpu的执行权使用这个也要抛出异常。 ArrayListStringlistnew ArrayList();MyThread m1new MyThread(list);MyThread m2new MyThread(list);m1.start();try {m1.join();} catch (InterruptedException e) {e.printStackTrace();}m2.start();结果等待m1执行完才会轮到m2
Thread-0aaa0aaa0
Thread-0aaa1aaa1
Thread-0aaa2aaa2
Thread-0aaa3aaa3
Thread-0aaa4aaa4
Thread-0aaa5aaa5
Thread-0aaa6aaa6
Thread-0aaa7aaa7
Thread-0aaa8aaa8
Thread-0aaa9aaa9
Thread-0aaa10aaa10
Thread-0aaa11aaa11
Thread-0aaa12aaa12
Thread-0aaa13aaa13
Thread-0aaa14aaa14
Thread-0aaa15aaa15
Thread-0aaa16aaa16
Thread-0aaa17aaa17
Thread-0aaa18aaa18
Thread-0aaa19aaa19
Thread-1aaa0aaa0
Thread-1aaa1aaa1
Thread-1aaa2aaa2
Thread-1aaa3aaa3
Thread-1aaa4aaa4
Thread-1aaa5aaa5
Thread-1aaa6aaa6
Thread-1aaa7aaa7
Thread-1aaa8aaa8
Thread-1aaa9aaa9
Thread-1aaa10aaa10
Thread-1aaa11aaa11
Thread-1aaa12aaa12
Thread-1aaa13aaa13
Thread-1aaa14aaa14
Thread-1aaa15aaa15
Thread-1aaa16aaa16
Thread-1aaa17aaa17
Thread-1aaa18aaa18
Thread-1aaa19aaa19
附一张线程的生命周期
