Firstly apologies for such a bad title, kindly suggest a good title. Here are the details on my issue that I am facing: Website: https://www.desmos.com/calculator/lzidy3m70r Steps: Click on + button on top left Select images and upload any image update values in fields center, width and height Issue: Not able…
Tag: java
Selenium screenshot performance
I am processing animations taking place in a webpage in a video software. I am currently using Selenium 4 with Chrome and I’d like to achieve a better performance. I could not find a way to leverage the Page.startScreencast method via Selenium, so my current approach is simply taking periodic screenshot…
Flat tree of objects while keeping father and child
I have a class Employee which has a tree structure with property team Using Java lambdas I need to flat this tree into same level list while converting Employee class into the following ConvertedEmployee while storing names in dedicated lead and subordinates properties. So ConvertedEmployee is in some sense a…
JFR: OutOfMemoryError while reading .jfr file
I’m trying to analyze a large Flight Recorder file (1.5 GB) that I created previously. When executing the jfr print command, the tool runs into an OutOfMemoryError: Is there a way to increase the heap size (-Xmx) for the jfr tool itself? I haven’t found a corresponding option in the documentation.…
BluetoothAdapter StartDiscovery does not work in Foreground Service
My application starts a service that detects phone shaking. When the service detects a shake, it searches for a BT device within range and if a suitable device is found, it connects to it and sends data to it. To check if the system is killing the service, I turn on the vibration when it detects shaking. Ever…
How can I use merge method in Java to append elements to the list value in map<Character,List>?
I am trying to understand the merge method. I have a map of <Character, List<Integer>>. I want to add the indices to the list of the appropriate key. I want to use the merge method to do so. I tried the following method. I am getting UnsupportedOperationException. What is the best way to do so usi…
Connecting to ES with Spring Data Elasticsearch (reactive) gives error host not reachable
I’m running on an aws-elasticsearch (with OpenSearch 1.1.x) service and im trying to connect with it from a spring application using spring-data-elasticsearch, according to the doc i configured the bean as it says. on my local i used a ssh tunnel from my aws account. i used this command: so i can connec…
Initial heap size set to a larger value than the maximum heap size
Im trying to start a .jar file with these args: and I get the error: Answer Override the current JAVA_OPTS value I am suggesting to keep on rate 1 to 2 between Xms and Xmx
Java, my own copy() method would not work
I am learning java and came upon a small problem, my copy() method will not work. I work based on a UML diagram and I am pretty sure that I’m doing everything correctly. Here is the code: Constructor: copy() method: The error flashes at the parantheses FileName() it says: ‘FileName(java.lang.Strin…
Checking if an object exists in a list Java Stream
I have 2 entity. One of them User, and the other one is Followers. I’m trying to make a follower system like Twitter. User can follow another user but, i want to check if user followed, don’t do it again. This is my Follower Entity : And this is the Service class : As you can see, I got the