线程的创建两种方式

创建线程有四种方式，今天主要演示的是两种：继承Thread，实现Runable接口

继承Thread创建线程

import lombok.extern.slf4j.Slf4j;@Slf4j
class MyThread extends Thread{private  int count=0;@Overridepublic void run(){for(int i=0;i<10;i++){if(count<10){log.info("{} :counter ={}",this.getName(),count++);}}}}
@Slf4j
public class ThreadTest {public static void main(String[] args) {MyThread m1=new MyThread();MyThread m2=new MyThread();m1.start();m2.start();}
}

测试结果

2019-07-24 14:25:22,725   [Thread-0] INFO  MyThread  - Thread-0 :counter =0
2019-07-24 14:25:22,725   [Thread-1] INFO  MyThread  - Thread-1 :counter =0
2019-07-24 14:25:22,725   [Thread-1] INFO  MyThread  - Thread-1 :counter =1
2019-07-24 14:25:22,725   [Thread-1] INFO  MyThread  - Thread-1 :counter =2
2019-07-24 14:25:22,725   [Thread-0] INFO  MyThread  - Thread-0 :counter =1
2019-07-24 14:25:22,725   [Thread-0] INFO  MyThread  - Thread-0 :counter =2
2019-07-24 14:25:22,725   [Thread-1] INFO  MyThread  - Thread-1 :counter =3
2019-07-24 14:25:22,725   [Thread-0] INFO  MyThread  - Thread-0 :counter =3
2019-07-24 14:25:22,725   [Thread-1] INFO  MyThread  - Thread-1 :counter =4
2019-07-24 14:25:22,725   [Thread-1] INFO  MyThread  - Thread-1 :counter =5
2019-07-24 14:25:22,725   [Thread-1] INFO  MyThread  - Thread-1 :counter =6
2019-07-24 14:25:22,725   [Thread-1] INFO  MyThread  - Thread-1 :counter =7
2019-07-24 14:25:22,725   [Thread-1] INFO  MyThread  - Thread-1 :counter =8
2019-07-24 14:25:22,725   [Thread-1] INFO  MyThread  - Thread-1 :counter =9
2019-07-24 14:25:22,725   [Thread-0] INFO  MyThread  - Thread-0 :counter =4
2019-07-24 14:25:22,741   [Thread-0] INFO  MyThread  - Thread-0 :counter =5
2019-07-24 14:25:22,741   [Thread-0] INFO  MyThread  - Thread-0 :counter =6
2019-07-24 14:25:22,741   [Thread-0] INFO  MyThread  - Thread-0 :counter =7
2019-07-24 14:25:22,741   [Thread-0] INFO  MyThread  - Thread-0 :counter =8
2019-07-24 14:25:22,741   [Thread-0] INFO  MyThread  - Thread-0 :counter =9Process finished with exit code 0

说明

两个线程，各自的变量，交替运行

实现Runable接口创建线程

import lombok.extern.slf4j.Slf4j;@Slf4j
public class RunableTest {public static void main(String[] args) {//内部类寄生于外部类，需要先创建外部类的对象RunableTest test = new RunableTest();MyThread m1 = test.new MyThread();//两个线程共享一个对象Thread t1 = new Thread(m1);Thread t2 = new Thread(m1);t1.start();t2.start();}class MyThread implements Runnable {public int count = 0;@Overridepublic void run() {for (int i = 0; i < 10; i++) {//runable只继承了getClass方法if(count<10){log.info("{} :counter ={}", Thread.currentThread().getName(), count++);}}}}}

测试结果

2019-07-24 14:26:40,722   [Thread-1] INFO  RunableTest  - Thread-1 :counter =1
2019-07-24 14:26:40,722   [Thread-0] INFO  RunableTest  - Thread-0 :counter =0
2019-07-24 14:26:40,737   [Thread-0] INFO  RunableTest  - Thread-0 :counter =3
2019-07-24 14:26:40,737   [Thread-0] INFO  RunableTest  - Thread-0 :counter =4
2019-07-24 14:26:40,737   [Thread-0] INFO  RunableTest  - Thread-0 :counter =5
2019-07-24 14:26:40,737   [Thread-0] INFO  RunableTest  - Thread-0 :counter =6
2019-07-24 14:26:40,737   [Thread-0] INFO  RunableTest  - Thread-0 :counter =7
2019-07-24 14:26:40,737   [Thread-0] INFO  RunableTest  - Thread-0 :counter =8
2019-07-24 14:26:40,737   [Thread-0] INFO  RunableTest  - Thread-0 :counter =9
2019-07-24 14:26:40,737   [Thread-1] INFO  RunableTest  - Thread-1 :counter =2Process finished with exit code 0

说明

两个线程，共享一个对象，交替运行。