请阅读下面程序 public class ThreadTest{ public static void main(String 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.prinfin('Hello'+i++) if(i=5) break } } } 该程序创建线程使用的方法是