See java.lang.Thread about threads.
Java applications can have multiple threads of execution running concurrently. (It depends on the thread scheduling of a computer if it has only one CPU.)
＜Implemetation＞
Extend the java.lang.Thread class.
Implement the java.lang.Runnable interface.
＜Life cycle of a thread＞
Generation → Executable → Execution → Finalization
＜How to make a thread unexecutable＞
Use these methods.
sleep
wait
＜How to make a waiting thread executable＞
Use these methods.
notify
notifyAll
＜How to have a running thread back to an executable state＞
Use this method.
yield
＜Synchronization＞
Use the synchronize keyword to synchronize multiple threads if necessary.
