From the course: Parallel and Concurrent Programming with Java 1
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Reentrant lock: Java demo - Java Tutorial
From the course: Parallel and Concurrent Programming with Java 1
Reentrant lock: Java demo
- [Instructor] In Java, there are three classes that implement the lock interface, a basic reentrant lock and two types of reentrant read write locks for reading and writing which we'll cover later. Notice that all three of those have the word reentrant in their name, and that's because Java does not have a standard non-reentrant lock. So for this video, I won't be able to compare a non-reentrant and a reentrant lock, so I'll just be using a reentrant lock to demonstrate its behavior. This is a variation of the previous example I used to demonstrate a data race and implementing mutual exclusion, with two shopper threads that concurrently increment the amount of items to buy on a shared shopping list. In this version, the shopper class has a private method on line 12 called addGarlic which uses the reentrant lock named Pencil to enforce mutual exclusion around a call to increment the class variable named Garlic on line 14. A related method on line 18 named addPotato performs a similar…
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