1. What is a Thread?

1. What is a Thread?
	Chapter 7. Threads

1.1. Definition

A thread is a single sequential flow of control within a program.
A thread runs within the context of a program's process and takes advantage of the resources allocated for that process and the it's environment.

1.2. Multiple threads

Multiple threads can run at the same time in the same process performing different tasks.
Multiple threads can share the resources of the process they share.

1.3. Example

class TwoThreadsTest {
   public static void main (String[] args) {
      new SimpleThread("Jamaica").start();
      new SimpleThread("Fiji").start();
   }
}
class SimpleThread extends Thread {
   public SimpleThread(String str) {
      super(str);}
   public void run() {
      for (int i = 0; i < 10; i++) {
         System.out.println(i + " " + getName());
         try {
            sleep((int)(Math.random() * 1000));
         }
         catch (InterruptedException e) {}
      }
      System.out.println("DONE! " + getName());
   }
}

1.3.1. Output

0 Jamaica
0 Fiji
1 Fiji
1 Jamaica
2 Jamaica
2 Fiji
...
8 Fiji
9 Fiji
8 Jamaica
DONE! Fiji
9 Jamaica
DONE! Jamaica

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