How to check Daemon Thread status in java?

Question

In myprogram I need to check if daemon thread is finished or not. Can I use isAlive() method for Daemon thread?

Answer 1

Actually you can ask the Thread for its current status by calling:

Thread.State ts = thread.getState();

and you should get one of the follwing:

A thread state. A thread can be in one of the following states:

• NEW A thread that has not yet started is in this state.

• RUNNABLE A thread executing in the Java virtual machine is in this state.

• BLOCKED A thread that is blocked waiting for a monitor lock is in this state.

• WAITING A thread that is waiting indefinitely for another thread to perform a particular action is in this state.

• TIMED_WAITING A thread that is waiting for another thread to perform an action for up to a specified waiting time is in this state.

• TERMINATED A thread that has exited is in this state.

Answer 2

根据Java文档 ， isAlive()方法并不关心您的线程是否是守护程序，守护程序仍然是线程，因此可以回答您的问题，可以。