— Scott McNealy, Sun Microsystems Chairman, President and ceo

Thread_t_=_new_Thread();_t.start();'>Thread t = new Thread();
t.start();
That’s it. By creating a new Thread object, 
you’ve launched a separate thread of 
execution, with its very own call stack.
Except for one problem.
That thread doesn’t actually do anything, 
so the thread “dies” virtually the instant 
it’s born. When a thread dies, its new 
stack disappears again. End of story.
So we’re missing one key component—
the thread’s job. In other words, we need 
the code that you want to have run by a 
separate thread.
Multiple threading in Java means we 
have to look at both the 
thread and the job 
that’s run by the thread. And we’ll also 
have to look at the Thread class in the 
java.lang package. (Remember, java.lang 
is the package you get imported for 
free, implicitly, and it’s where the classes 
most fundamental to the language live, 
including String and System.)

---

490
 
chapter 15
Java has multiple threads but only 
one Thread class
We can talk about thread with a lower-case ‘t’ and Thread 
with a capital ‘T’. When you see thread, we’re talking 
about a separate thread of execution. In other words, 
a separate call stack. When you see Thread, think of 
the Java naming convention. What, in Java, starts with a 
capital letter? Classes and interfaces. In this case, Thread 
is a class in the java.lang package. A Thread object 
represents a thread of execution; you’ll create an instance of 
class Thread each time you want to start up a new thread 
of execution.
thread
run( )
doStuff( )
go( )