下列代码编译或执行结果的描述中，正确的是：
class Test{
public static void main(String args[]){
TestThread pm1 = new TestThread("One");
pm1.start();
TestThread pm2 = new TestThread("Two");
pm2.start();
}
}
class TestThread extends Thread{
private String sTname="";
TestThread(String s){
sTname = s;
}
public void run(){
for(int i=0;i<2;i++){
try {
sleep(1000);
} catch (InterruptedException e) {}
System.out.println(sTname+" ");
}
}
}