阅读下面程序public cmass ThreadTest { public static void main(String args[]) { Thread t1=
阅读下面程序 public cmass 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.println("Hello"+i++); it(i==5) break; } } } 此程序创建线程所使用的方法是
A.继承Thread类
B.实现Runnable接口
C.t1.start()
D.t2.start()