Chapter 8 summary

• Concurrent processes contain two, or more, independently executing threads.

• The Java Thread class can be extended to implement an application specific thread.

• When a Thread's start() action is called it causes the instance's run() action to be started in a concurrent manner.

• Actions, or parts of actions, can be made "thread safe" by declaring them as synchronized

• A running Thread can be temporarily stopped by calling its suspend() action and restarted by calling its resume() action.

• A Thread can be suspended for a period of time by calling its sleep() action.

• Two or more threads can co-ordinate their actions by suspending and resuming each other.

• Concurrent programs require much more care in their design than non-concurrent programs and are subject to a number of very elusive bugs.

Exercises for Chapter 8.

8.4 Problems with concurrency.