java并发（一）：初探线程的创建
2024-09-01 20:19:21
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;
@Override
public 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 =9
Process 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;
@Override
public 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 =2
Process finished with exit code 0
说明
两个线程，共享一个对象，交替运行。
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