线程（继承Thread类实现）

package HowToRun;

public class DemoThread extends Thread {

public void run(){

for(int i=0;i<10;i++){

System.out.println("DemoThread-------->"+i);

}

}

public static void main(String[] args) {

DemoThread demoThread=new DemoThread();

demoThread.start();

for(int i=0;i<10;i++){

System.out.println("-----main------>"+i);

}

}

}