File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Programmer Certification (SCJP/OCPJP) and the fly likes Threads Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Certification » Programmer Certification (SCJP/OCPJP)
Bookmark "Threads" Watch "Threads" New topic


Sudipta Das

Joined: Apr 05, 2001
Posts: 18
This question is also from the mock exam The correct answers are given as 'a' & 'b'. Is only 'b' not enough ? Please advise me.
What can you write at the comment //A in the following code so that this program writes the word "running" to the standard output?
1. class RunTest implements Runnable {
2. public static void main(String args[]) {
3. RunTest rt = new RunTest();
4. Thread t = new Thread(rt);
5. //A
6. }
7. public void run() {
8. System.out.println("running");
9. }
10. void go() {
11. start(1);
12. }
13. void start(int i) {
14. }
15. }
Select all valid answers.

Ans :
a. System.out.println("running");
b. t.start();
c. rt.start();
d. rt.start(1);
Sean Casey
Ranch Hand

Joined: Dec 16, 2000
Posts: 625
In this code answer b is fine. You are implementing the interface Runnable which contains one method to override public void run(). In this definition the run method is properly overridden. A thread object is created and given an instance of the class implementing runnable as it's target, so t.start will move the thread to the runnable state.
I agree. Here's the link:
subject: Threads
It's not a secret anymore!