Threads

• Read http://download.oracle.com/javase/1.4.2/docs/api/java/lang/Thread.html
• Read http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Thread.State.html
• Read http://www.roseindia.net/java/thread/life-cycle-of-threads.shtml
• Lab:
  1. Run test1.java a few times. Describe its behaviour.
  2. Try CounterOne.java. Every time the Start button is pressed the counter starts again at one. Why is this? What happens if you click the stat button twice or more times?

  3. Describe the behaviour of tryIt.java.
  4. Rewrite the run method, above, so it blocks the main thread and repeatedly allows the user to enter Strings until the user enters ok at which point the main thread is allowed to procede. See tryIt2.java for solution.

  5. Write a program which is similar to CounterOne.java which has a textfield where the numbers cycle round between 0 and 9. But this time when you press the stop button the numbers stop cycling, and when you press the start button they carry on. Answer: CounterTwo.java.