All Questions
15 questions
-1
votes
1
answer
103
views
Make a `Callable` of my `Runnable` in Java
I have some tasks defined as Runnable objects. I want to invoke those tasks by using the invokeAll or invokeAny methods on ExecutorService.
The problem is that those methods take a collection of ...
- 336k
1
vote
1
answer
538
views
Why do threads through a loop give an error when with Executor
The sample code is taken from the Java Philosophy 2015 book and it used Java SE5/6. I used JDK11, maybe this code is not suitable for the new version, but why?
public static void main(String[] args) { ...
3
votes
1
answer
690
views
Android Thread Execution Slows Down when screen locks
Iam running this procedure to download some data and insert them into the database. The total procedure takes around 5 minutes. I noticed that while downloading, when the phone locks the screen and ...
- 2,928
9
votes
1
answer
2k
views
"Runnable::run" - How is this creating an Executor instance?
I'm working on a project where the following line is used to create a test Executor member variable instance:
private Executor executor = Runnable::run;
The code runs and compiles but I don't ...
- 171
0
votes
1
answer
1k
views
Executors not completing all the task
Hi I am trying to run below code, and after executor is terminated I am expecting the count of remaining task to be 0, but for some reason it's more then 100 when it satisfy below condition.
while(...
- 1,996
3
votes
1
answer
293
views
Method reference as an Executor implementation
I have been studying an example java code written by someone and faced the following snippet:
Runnable runnable = () -> System.out.println("Thread name: " + Thread.currentThread().getName());
...
- 43
0
votes
0
answers
308
views
Executor in java with Runnable Object
I was trying to learn the Executors and is having doubts.
Assuming that I has 2 Runnable objects Socket1Write and Socket2Write which have a run method. Run methods have an infinite loop which will ...
- 35
2
votes
1
answer
150
views
Java - ExecutorService : How to re run "wait state" thread
I'm using ExecutorService like,
ExecutorService executorService = Executors.newFixedThreadPool(5);
for(int i = 0 ; i < 5 ; i ++){
executorService.submit(new MyRunnable());
}
and my Runnable ...
- 348
1
vote
0
answers
269
views
recycle Runnable object, how can i do it?
in my Android App I'm using a single thread executor and every 300 milliseconds I create a new MyRunnable and I call the method execute() of my SingleThreadExecutor.
Now my goal is to recycle the ...
- 1,074
0
votes
0
answers
75
views
Android Threads are automatically suspended
I'm trying to make some calculations using Multi threading. At maximum I will have to make 100 different calculations. Even when I tried to balance the start of threads from 10 each time, I am having ...
- 23
3
votes
2
answers
13k
views
java executor delay not working
Ok so I have tried 3 different options of delayed executors for a void/runnable/timertask that I want to run after 5 seconds but all the codes I used didn't work. They would immediatly run the code.
...
- 47
0
votes
1
answer
286
views
Android: Make threads run queued one by one in AlarmBroarcastReceiver
Kindly ask for your advice, i'm new to Android programming.
I'm writing an alarm-clock-like software, and use public class AlarmManagerBroadcastReceiver extends BroadcastReceiver
to catch alarms set ...
- 3
1
vote
2
answers
4k
views
How to know when a thread stops or is stopped?
I have the next code:
Executor exe = Executors.newFixedThreadPool(20);
while (true) {
try {
exe.execute(new DispatcherThread(serverSocket.accept()));
continue;
} catch (...
- 309
2
votes
4
answers
2k
views
Should I use an Executor to run only 1 Runnable? When to use an executor?
I am making a server, and the server creates a thread for each client that connects. That thread will have an open inputstream which it will monitor for incoming messages. The Runnable of that thread ...
- 23
6
votes
6
answers
14k
views
Schedule Java task for a specified time
I would like to be able to schedule a task at a specific time in Java. I understand that the ExecutorService has the ability to schedule at periodic intervals, and after a specified delay, but I am ...
- 4,869