单选题
请阅读下面程序 public class ThreadTest public static vodi main(Sting args[]) Thread t1=new Thread(new Hello()); Thread t2=new Thread(new Hello()); t1.start(); t2.start();
class Hello implements Runnable int i; public void run() while (true) System.out.printIn("Hello"+i++); if(i==5) break;