List集合中，启动线程的功能该如何做呢？

郭小贱

public class MYThread extends Thread {
private int beg;
private int end;

public MYThread (int beg,int end){
    this.beg=beg;
    this.end=end;   }

@Override
public void run() {
    this.gramDis();
}

   public void gramDis(){
//写具体打印代码
}

}
//调用
public class StartThread(){
public static void main(String[] args) {
MYThread th1=new MYThread (1,1000);
MYThread th2=new MYThread (1,1000);
th1.start();
th2.start();
}
}