Threads - Beginning Java - page 760

Thread first = new Thread(new JumbleNames("Hopalong ", "Cassidy
", 200L));
Thread second = new Thread(new JumbleNames("Marilyn ", "Monroe ",
300L));
Thread third = new Thread(new JumbleNames("Slim ", "Pickens ",
500L));

// Set threads as daemon
first.setDaemon(true);
second.setDaemon(true);
third.setDaemon(true);
System.out.println("Press Enter when you have had enough...\n");
first.start(); // Start the

first thread
second.start(); // Start the

second thread
third.start(); // Start the

third thread
try {
System.in.read(); // Wait until

Enter key pressed
System.out.println("Enter pressed...\n");

} catch (IOException e) { // Handle IO

exception
System.err.println(e); // Output the

exception
}
System.out.println("Ending main()");
return;

}

private String firstName; // Store for

first name
private String secondName; // Store for

second name
private long aWhile; // Delay in

milliseconds
}

JumbleNames.java

How It Works
You have the same data members in this class as you had in the previous example. The constructor is al-
most the same as previously, too. You can't call setDaemon() in this class constructor because the class
isn't derived from Thread . Instead, you need to do that in main() after you've created the objects that
represent the threads and before you call the run() method. The run() method implementation is also
very similar. The class doesn't have sleep() as a member, but because it's a public static member of
the Thread class, you can call it in the run() method by using the class name as the qualifier.