Java™ How To Program (Early Objects), Tenth Edition

Class Consumer

Class Consumer (Fig. 23.11) also implements interface Runnable, allowing the Consumer to execute concurrently with the Producer. Lines 11–14 initialize Buffer reference sharedLocation with an object that implements the Buffer interface (created in main, Fig. 23.13) and passed to the constructor as the parameter shared. As we’ll see, this is the same UnsynchronizedBuffer object that’s used to initialize the Producer object—thus, the two threads share the same object. The Consumer thread in this program performs the tasks specified in method run (lines 17–39). Lines 21–34 iterate 10 times. Each iteration invokes Thread method sleep (line 26) to put the Consumer thread into the timed waiting state for up to 3 seconds. Next, line ...