简单了解Java创建线程两种方法

public class MutliThreadDemo {
  public static void main(String[] args) {
    
    //创建Thread子类的实例，即创建了线程对象
    MutliTread mt1 = new MutliTread("Thread");
      
    //不立即执行多线程代码，而是使得该线程变为就绪态（Runnable）
    mt1.start();
  }  
}

//通过扩展Thread类来创建线程
class MutliTread extends Thread{
  
  public MutliTread(String name) {
    this.setName(name);
    //或super(name)
  }
  public void run() {
    for(int i = 0; i < 10; i++) {
      System.out.println(Thread.currentThread().getName() + ":" + i);
    }  
  }
}

public class MutliThreadDemo3 {
  
  public static void main(String[] args) {
     
    //创建一个Runnable接口实现类
    MutliTread3 m = new MutliTread3();
    
    //实例化线程对象
    Thread t1 = new Thread(m, "甲");
    Thread t2 = new Thread(m, "乙");
    Thread t3 = new Thread(m, "丙");
    t1.start();
    t2.start();
    t3.start();
  }  
}

class MutliTread3 implements Runnable{
  
  public void run() {
    for(int i = 0; i < 10; i++) {
      System.out.println(Thread.currentThread().getName() + ":" + i);
    }  
  }
}

public class MutliThreadDemo3 {
  
  public static void main(String[] args) {
    
    Runnable r = () -> {  
      for(int i = 0; i < 10; i++) {
        System.out.println(Thread.currentThread().getName() + ":" + i);
      }  
    };
    
    //实例化线程对象
    Thread t1 = new Thread(r, "甲");
    Thread t2 = new Thread(r, "乙");
    Thread t3 = new Thread(r, "丙");
    t1.start();
    t2.start();
    t3.start();
  }  
}