I’m writting an JavaFX application, where i use UTM32 coordinates for my geometries, i have a dynamic stroke width dependent on my zoom level. The issue is that i can’t trigger events when my stroke width is decreased at a certain factor. If you use Intellij you can start a new fx-project and copy following code to reproduce this behaviour:
Object is modified implicitly in one method and used by another
I have two methods meth1 and meth2. meth1 takes in an input of a set set1, returns a value, and also modifies set1. Now meth2 uses this set1 to compute another return value. The issue I see with this code is that the set modification is implicit and would be missed by a coder who is not careful enough. I
Concat new characters to StringBuilder object atomically
My problem is: I have class: I need to add new characters to StringBuilder concurrently and atomically. But problem is, only last 128 characters should be in this object. I can’t use StringBuffer, because operation should be non-blocking. So,there are two operations: First: check if StringBuilder already has 128 chars. Second: if it has not -> add new char, if
How can i pass values from sqlite database to viewpager?
There is my model. (Card with two questions) This is my Activity. Adapter pass values from ArrayList to the ViewPager. In this class I create DataBase and try to pass values from cursor to ArrayList in MainActivity, but, when I start to debug, the debugger shows me that ArrayList in MainActivity is not filled with values. What I should do
Implementing a printAnimals method
I am trying to implement a printAnimals() method that prints the ArrayList for dogs or prints the ArrayList for monkeys, or prints all animals whose training status is “in service” and whose is Not reserved, depending on the input you enter in the menu. I am trying to correctly write a for loop for both ArrayList that contains if statements,
java_home is not read by hadoop
I installed java8 with brew install –cask adoptopenjdk/openjdk/adoptopenjdk8 but i think i messed things up, when i type echo $JAVA_HOME it gives /usr/bin/java when i type java -version it gives java version “1.8.0_311” Java(TM) SE Runtime Environment (build 1.8.0_311-b11) Java HotSpot(TM) 64-Bit Server VM (build 25.311-b11, mixed mode) when i type /usr/libexec/java_home it gives /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home when i try to
Parsing Avro messages in flink , giving null pointer exception if field is nullable in Avro Schema
I need to parse the messages from confluent Kafka stored in Avro. But while applying filter it is giving null pointer exception, without filter i was able to write back into kafka but while applying filter, it is giving null pointer exception. Here is the Schema: Answer When you have null vallue in your topic for col3 and you trying
CommandLineRunner overridden run() method not executing
The problem: overridden run() method from CommandLineRunner class is not being executed. Folder structure: Code: Main class: CommandLineRunner class: As it says in the println() method, this is not printing anything, only this startup logs: There are couple existing questions on this topic on Stackoverflow, but nothing helped. Does anyone have an idea what might be causing the problem? Thanks
Make order of responses match order of requests in Netty
Context I am writing a Netty application (Netty 4) in which the processing of each message might take some time. As an example of what I mean I have created an EchoHandler that responds with the original message, though sometimes after a short delay: Problem Using this code, the order of the responses is not guaranteed to be the same
Bundle is null when starting an activity from a listener using intent
The bundle is null when I use this code. The Logcat shows: MyListenerService.java MainActivity.java I have this working in a similar module of another project and have been comparing them. The only notable difference is that the working MainActivity extends Activity, and this one extends AppCompatActivity. I looked at this, but code seems consistent as it does use a bundle.