Threads not working together well !

Question

Dear People,
The following line of code gives an error message:
while(inTray.size() != 0)
The error message says:
current thread not owner, Exception in thread "main"
Thank you for your advice
Stan

Answer 1

Dear Dubwai,
Here is the entire output. (Except for entire list
t of credits and debits posted by the bank. )
Start debit of A//C No. 2 : $971 amount: 45
Start credit of A//C No. 1 : $624 amount: 71
End credit of A//C No. 1 : $695 amount: 71
java.lang.IllegalMonitorStateException: current thread
not owner
     at java.lang.Object.wait(Native Method)
     at java.lang.Object.wait(Object.java:426)
     at stan_ch15p638.Clerk.isBusy(Clerk.java:80)
at
stan_ch15p638.TryBankOperation.main(TryBankOperation.j
va:75)
End debit of A//C No. 2 : $926 amount: 45
Start debit of A//C No. 2 : $926 amount: 48
Exception in thread "main"
I would post the entire program but the last time I
did that
I received a negative response. The error message
speaks of
line 75 which is the line posted previously.No it isn't.
This is what you posted.
while(inTray.size() != 0)
In the above stack trace the following appears...
Clerk.isBusy...
That is where the problem occurs in your code.