- Java supports parallel concepts.
- Class Thread implements this concept.
- Every program has at least one thread.
- Every program can have unlimited threads.
- Threads will run concurrrent (if possible, otherwise round robin)
- Storage class synchronized is used to block functions that must not be parallel (e.g. access to resources or static variables should be synchronized)
- Classes that shall start an extra thread extend
Thread or must pass an implementation of a Runnable class to a thread constructor.
- Used for:
- Applets running permanently in the background such as animations.
- Parallel calculations.
- Listeners (e.g. for events or for input).
- Use
yield() or sleep() at busy waiting routines!
|
