Checking for memory usage by stack using this command: I can see that reserved memory is different from committed. Reserved is about 1MB (default for stack). Committed in fact is physical reserved. I read that java save memory for stack while is not totally used. Running command like top I can see just commit…
How do I increase the default timeout in the Cassandra Java driver using the DriverConfigLoader?
Small question regarding a Spring Webflux Reactive Cassandra application please. On a setup Spring Boot 2.6.4 with Webflux and reactive Cassandra, I am using the app to insert some data in Cassandra tables. Things works fine, until when there is a higher load, I am seeing an issue (stack trace attached) The t…
how do I break a while loop when asking for user input?
i need to try to break the while loop when a user enters an empty line instead of countries. Here is the code I have done so far and it does not seem to want to end the loop of asking for countries: the user input should look as follows: Answer Your checking for hasNext() but should be checking for
Custom jackson deserializer only for nested class
I have a vehicle Java class defined like this: TimeWindow is defined like this: Now, the JSON I am getting, does not define latitude and longitude for the location (start and end); this information is encoded as just an array, see e.g.: How can I write a custom deserializer for just Location (same problem wit…
How do I approach this recursively in Java?
In this program I need to get input from the user that indicates the length of the numbers with this quality: The number should be prime and if you delete each digit from the right the number that is left should still be prime. i.e. 2399 is such a number. Because 2399 is prime, and also 239, and 23, and
Is webElement being called by passing the variable of WebElement into constructor of another “Actions” class?
I didn’t understand the last step. Answer The answer is definitely not. You can see this by debugging the test script you wrote It will take that element’s ‘By locator’ data (In this case it is By.cssSelector(“a[id=’nav-link-accountList’]”) ) add pass it to the …
Java sorting list of array vs sorting list of list
I have a list of points where each point is a tiny list of size 2. I want to sort the list of points in increasing order of x and if x values are equal, I break tie by sorting in decreasing order of y. I wrote a custom comparator to sort the points like this: Here’s the input before
Generic Method in Java with out parameters
I am trying to implement something similar to EventBus implemented in eshopOnContainers. Is it Possible to define a method like this in java & read the meta data about T and TH at runtime ? There can be multiple classes extending IntegrationEvent(e.g. PriceChangedEvent) & we should be able to Identify…
Why is the number of threads in a java process different from the actual size of non-heap memory?
The sentences may be strange due to my lack of English knowledge Thanks to everyone who reads the question. Hello? I am running a java process on Centos7 and monitoring it with jconsole, but the number of threads currently created is different in non-heap memory size. I know that one thread occupies 1mb by de…
XPath doesn’t locate element
I want to scrape links from this page. https://www.youtube.com/results?search_query=food+recepies None of these works for me. Answer This should work for the title. However, there are 27 of them. So, you might want to use Another thing is that you might want to wait until the elements are visible, enabled, cl…