网站建设收费标准市场,打开百度网站建设,大型网站开发 优帮云,下载gs甘肃人社多线程学习多线程1. 并行与并发2.进程和线程3. *****多线程的实现方式3.1 继承Thread类的方式进行实现3.2 实现Runnable接口方式进行实现3.3 利用Callable和Future接口方式实现3.4 设置获取线程名字4.获得线程对象5.线程休眠6.线程调度[线程的优先级]7.后台线程/守护线程多线程…
多线程学习多线程1. 并行与并发2.进程和线程3. *****多线程的实现方式3.1 继承Thread类的方式进行实现3.2 实现Runnable接口方式进行实现3.3 利用Callable和Future接口方式实现3.4 设置获取线程名字4.获得线程对象5.线程休眠6.线程调度[线程的优先级]7.后台线程/守护线程多线程
1. 并行与并发
并行同一时刻有多个指令在多个CPU上同时执行 并发同一时刻有多个指令在单个CPU上交替执行
2.进程和线程
进程正在运行的软件
线程进程中的单个顺序控制流是一条执行路径
3. *****多线程的实现方式 3.1 继承Thread类的方式进行实现 public class MyThread extends Thread {Overridepublic void run() {for (int i 0; i 100; i) {System.out.println(线程开启i);}}public static void main(String[] args) {MyThread t1new MyThread();MyThread t2new MyThread();t1.start();t2.start();}
}为什么要重写run()方法 多线程开启之后执行run()方法run()是用来封装被线程执行的代码run()方法和start()方法的区别 run方法调用不开启线程start开启线程
3.2 实现Runnable接口方式进行实现 public class MyRunnable implements Runnable{Overridepublic void run() {for (int i 0; i 100; i) {System.out.println(线程开启了i);}}public static void main(String[] args) {MyRunnable mrnew MyRunnable();Thread t1new Thread(mr);t1.start();MyRunnable mrsnew MyRunnable();Thread t2new Thread(mrs);t2.start();}
}
3.3 利用Callable和Future接口方式实现 public class MyCallable implements CallableString {Overridepublic String call() throws Exception {for (int i 0; i 50; i) {System.out.println(向女孩表白i);}return 答应;}public static void main(String[] args) throws ExecutionException, InterruptedException {MyCallable mtnew MyCallable();FutureTaskString ftnew FutureTaskString(mt);Thread tnew Thread(ft);t.start();String s ft.get();System.out.println(s);}
}
get方法在线程开启之后调用 三种方式对比
3.4 设置获取线程名字
获取线程名字
public class Mythread extends Thread {Overridepublic void run() {for (int i 0; i 100; i) {System.out.println(getName()****i);}}public static void main(String[] args) {Mythread mtnew Mythread();mt.start();Mythread ssnew Mythread();ss.start();}
}设置线程民资
set形式 Mythread mtnew Mythread();mt.start();mt.setName(线程1);Mythread ssnew Mythread();ss.start();ss.setName(线程2);构造器形式
public class Mythread extends Thread {Overridepublic void run() {for (int i 0; i 100; i) {System.out.println(getName()****i);}}public Mythread(String name) {super(name);}public static void main(String[] args) {Mythread mtnew Mythread(线程1);mt.start();Mythread ssnew Mythread(线程2);ss.start();}
}4.获得线程对象
在runnable中可以获取线程对象名字
public class MyRunnable implements Runnable {Overridepublic void run() {for (int i 0; i 50; i) {System.out.println(Thread.currentThread().getName()runningi);}}public static void main(String[] args) {
// MyRunnable myRunnablenew MyRunnable();
// Thread threadnew Thread(myRunnable);
// thread.setName(666);
// thread.start();String name Thread.currentThread().getName();System.out.println(name);}
}
5.线程休眠
Thread.sleep(3000); Overridepublic void run() {for (int i 0; i 50; i) {System.out.println(Thread.currentThread().getName()runningi);try {Thread.sleep(3000);} catch (InterruptedException e) {e.printStackTrace();}}}
6.线程调度[线程的优先级] public class MyCallable implements CallableString {Overridepublic String call() throws Exception {for (int i 0; i 50; i) {System.out.println(Thread.currentThread().getName()***i);}return 线程执行结束;}public static void main(String[] args) {MyCallable mcnew MyCallable();FutureTaskString ftnew FutureTask(mc);Thread threadnew Thread(ft);thread.start();thread.setPriority(2);thread.setName(飞机);
// System.out.println(thread.getPriority());MyCallable mc2new MyCallable();FutureTaskString ft2new FutureTask(mc2);Thread t2new Thread(ft2);t2.start();t2.setPriority(10);t2.setName(坦克);
// System.out.println(t2.getPriority());}
}
7.后台线程/守护线程
普通线程结束 守护线程也随之结束
public class MyThread extends Thread {Overridepublic void run() {for (int i 0; i 10; i) {System.out.println(getName()****i);}}public MyThread(String name) {super(name);}public static void main(String[] args) {MyThread mtnew MyThread(女神);mt.start();MyThread2 t2new MyThread2(备胎);t2.setDaemon(true);t2.start();}
}
public class MyThread2 extends Thread {Overridepublic void run() {for (int i 0; i 100; i) {System.out.println(getName()****i);}}public MyThread2(String name) {super(name);}
}
