From the course: Parallel and Concurrent Programming with Java 2
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Condition variable: Java demo - Java Tutorial
From the course: Parallel and Concurrent Programming with Java 2
Condition variable: Java demo
- [Instructor] This Java program, to demonstrate using condition variables, defines a class named HungryPerson on line seven, which has three variables, an instance variable named personID on line nine, which is a unique ID number that gets passed to the HungryPerson constructor method, a static class variable named slowCookerLid, which is the reentrant lock that protects access to the third variable on line 11, representing the number of servings in the slow cooker, which gets initialized to 11. When a HungryPerson thread starts, the run method uses a while loop on line 18 to keep taking servings of soup until there's none left. For each iteration of the loop, the HungryPerson takes the slowCookerLid by locking it on line 19, then they check to see if it's their turn to take the next serving by comparing their ID number to the number of servings left, modulo two since there are two people in this example. If it is their turn, and there's soup left in the pot, then they take a serving…
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