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I have been trying to solve a problem involving thread communication using wait() and notify(). Basically i have 2 threads T1 and T2 and i want them to be executed in the following order
T1 , T2, T1, T2 ….. How can i achieve that?
Actual Problem: There are 2 threads T1 – which prints odd numbers (say 1 – 100) and T2 – which prints even numbers (1 – 100). Now, the output should be 1, 2, 3, 4 , 5 , …. 100
You describe a Producer-Consumer pattern.
It’s java implementations described in numerous java books including M.Grand “Patterns in Java. Volume I” and “Java 2: The Complete Reference” by Naughton and Schildt.
Basic idea: both threads should use 1 monitor (i.e. their code should be inside
synchronized(monitor) {}blocks). You also need some flag variable which should indicate which of two threads should work at the moment.When one of your threads is inside synchronized block it should check flag variable whether it’s his turn to do the job. If yes, let it work and then change flag value and then notify all waiting threads. If no, then it should wait.