下列程序的功能是在监控台上每隔一秒钟显示一个字符串"Hello!",能够填写在程序中下划线位置,使程序完整并能正确运行的语句是【 】public class Test implements Runnable{ public static void main(String args[]){ Test t=new Test(); Thread tt=new Thread(t); tt.start(); } public void run(){ for(;;){ try{ ; }catch(e){} System.out.println("Hello"); } } }
A.sleep(1000) InteruptedException
B.t.sleep(1000)InterruptedException
C.Thread.sleep(1000)RuntimeException
D.Thread.sleep(1000) InterruptedException