Thread: Single Server Queue Problem

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How do you execute the code for testing? I don't see a main() method.

The code hangs when I start its execution? There is no output.

Here's what I get with that input:

Running: java.exe -cp . SingleServerQueueTest

Time updated by 2 time units and time is now 2.
No customer is being served at the present time of 2.
A customer entered system at time 2. Number waiting in queue is 0.
Time updated by 4 time units and time is now 6.
A customer entered system at time 6. Number waiting in queue is 1.
Time updated by 1 time unit and time is now 7.
A customer entered system at time 7. Number waiting in queue is 2.
Customer C1/T2 finished at time 7. Number waiting is 2.
Program Error!

1 error(s)

Here is the statement I use to automate input:

      stdin = new Scanner("T 2\nC\nA\nT 4\nA\nT 1\nA\nC\n"); //<<<<<<<<<<System.in);

Why is the last line wrong?

Did the output from my version look like what you get?

Do the values in the Scanner class's constructor I posted work for you and give you the output showing the problem?

Why is the last line wrong?

For testing you should put a String in the Scanner class's constructor like I showed earlier so everyone that tries testing will easily get the same results. I find typing in responses prone to error besides being a waste of time.

You need to add some debug output to show the status of the queue as the code executes to see what is happening.