This question already has answers here:
What does java.lang.Thread.interrupt() do?
(10 answers)
Closed 4 years ago.
I know how to interrupt a thread. But I want to know how interrupt method works internally in java multi threading ?
Here's a simplistic answer. If the thread is in a wait condition, an InterruptedException is thrown. If the thread is active, the thread's interrupted flag is set.
Related
This question already has answers here:
How do you kill a Thread in Java?
(17 answers)
Force kill, stop or destroy thread in java [duplicate]
(1 answer)
Closed 3 months ago.
This post was edited and submitted for review 3 months ago and failed to reopen the post:
Original close reason(s) were not resolved
I have a thread that is running a runnable with just one command like this:
mainRunnable = new Runnable(){
public void run(){
startClient();
}
};
This is not a normal thread where I am doing something over and over again (this would be easy to stop), but a thread were the command is running constantly and is blocking execution of further code in the runnable. So I basically, cannot implement the stop I believe.
This one command startClient is running all the time, is there a way I could stop it using the Thread object?
This question already has answers here:
Simple Swing Delay
(3 answers)
Closed 6 years ago.
In Java, I can use sleep(x) to delay some code from running for x seconds. But, if I'm using Swing, that makes my GUI freeze, so it's not an ideal solution.
How can one create a delay before running a sequence of code in Java?
To start, you probably shouldn't be doing whatever you're doing
in the display thread. If it were in your own thread, the GUI
wouldn't freeze. But short of revisiting your entire thread
strategy, the usual workaround is to add a queue of tasks to
be run later.
This question already has answers here:
"implements Runnable" vs "extends Thread" in Java
(42 answers)
Closed 8 years ago.
I have studied that we can create threads in two ways in java :
By extending Thread Class
By implementing Runnable interface under which we have to implement run()
Now my question is what is the difference b/w the two?
Is any 1 faster or efficient than other? something related to binding here or linking?
A Thread is a resource for performing work.
A Runnable is a unit of work.
Are you creating a new type of resource, or defining work? It's almost always the later.
In the simplest case there isn't really any functional performance difference. However, creating Runnables allows you to utilize Thread pools without changing your code much, which is a huge boost over using new Thread() in many cases.
This question already has answers here:
What is a deadlock?
(19 answers)
Closed 9 years ago.
What is deadlock in programming Object Oriented ?
I had knew deadlock in transaction of Database Systems. But in programming I'm not clear.
I want to know when deadlock occur and how to resolve it.
Thanks!
A deadlock is when you have two or more processes that are each waiting for the other to finish. When this happens, neither one can continue and the program essentially stalls.
There is a basic example here
http://docs.oracle.com/javase/tutorial/essential/concurrency/deadlock.html
well documented.
but, a deadlock occurs when you wait for a object to be freed but that condition is never achieved.
This question already has answers here:
Do spurious wakeups in Java actually happen?
(7 answers)
Closed 8 years ago.
What is the meaning of spurious wakeups in Java? Why they are so dangerous? Can you explain it with an example?
The JVM is allowed to wake a waiting thread without another thread calling its notify() method - a so called "spurious wakeup".
If you don't consider this possibility, you may proceed with processing when the wait state has not been achieved, leading to incorrect behaviour.
The correct approach when woken up is to first check that the state your thread is waiting on has actually been achieved, otherwise return to waiting by immediately calling wait()