February 2014
Beginner
1248 pages
62h 25m
English
Content preview from Java™ How To Program (Early Objects), Tenth Edition
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Implementing the Runnable Interface
Class PrintTask (Fig. 23.3) implements Runnable (line 5), so that multiple PrintTasks can execute concurrently. Variable sleepTime (line 8) stores a random integer value from 0 to 5 seconds created in the PrintTask constructor (line 17). Each thread running a PrintTask sleeps for the amount of time specified by sleepTime, then outputs its task’s name and a message indicating that it’s done sleeping.
1 // Fig. 23.3: PrintTask.java 2 // PrintTask class sleeps for a random time from 0 to 5 seconds 3 import java.security.SecureRandom; 4
5 public class PrintTask implements Runnable 6 { 7 private static final SecureRandom generator = new SecureRandom(); 8 private ...
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