Thread stop, daemon thread, join () method

One, the thread stops:
There is a stop () method, which, while still available, is obsolete, and therefore recommends the following methods.
1, stop a thread: we generally will be controlled by a variable.

2, if you need to stop a thread in the waiting state, then we need to use the variable with the Notify method or interrupt ().
Prerequisite: A thread that is in a waiting (blocking) state may keep the program running.

1) Notify (): Occasionally can stop.

2) Interrupt (): The thread's waiting state is forced to clear, the purged state of the thread will receive a Interruptedexception exception.

Second, the Guardian thread

1, daemon thread (background thread): If only a daemon thread is left in a process, then the daemon will die.

2, note: A thread default is not a daemon thread.

3, demand: Analog QQ download update package.

Three, join () method Detailed:
1, join (): Join.

2. Demand:

3, the solution: