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“你好!”,能够填写在程序中画线位置,使程序完整并能正确运行的语句是 public class Exam implements Runnable public static void main(String args[]) Exam t=new Exam(); Thread tt=new Thread(t); tt.start(); public void run() for(;;) try ; catch(e) System.out.println( 你好! );
A.sleep(1)
RuntimeException
B.sleep(1000)
InterruptedException
C.Thread.sleep(1)
InterruptedException
D.Thread.sleep(1000)
InterruptedException