为了使下面的程序能够输出“Thread is running”，请在在空格处填上相应的代码。public class B implements Runnable {public static void main(String[] args) {Thread t = new Thread(new B());_______________________ //此处填空}public void run() {System.out.println("Thread is running");}public void go() {start(1);}public void start(int i) {}}