I am trying to pull specific items out of massive zip files in S3 without downloading the entire file. A Python solution here: Read ZIP files from S3 without downloading the entire file appears to work. The equivalent underlying capabilities in Java appear to be less lenient in general so I’ve had to ma…
JDialog not focused on OSX when Java is not on top
My JDialog is not focused when the Java program is not in the front in OSX. How do I achieve this? I have the following test program to illustrate the scenario (at the bottom), running using javac Test.java && java Test from a terminal. When the terminal output “Started first”, it will cha…
ClassNotFoundException: Failed to find data source: bigquery
I’m trying to load data from Google BigQuery into Spark running on Google Dataproc (I’m using Java). I tried to follow instructions on here: https://cloud.google.com/dataproc/docs/tutorials/bigquery-connector-spark-example I get the error: “ClassNotFoundException: Failed to find data source:…
How to send a valid result of an arithmetic operation through DataOutputStream
I have a subprocess class that calculate the sum of two integers and then put it in a DataOutputStream: when writing the two values of a and b like 12 and 47 respectivley the result is “ei”. In another hand the mainprocess won’t read that result like an DataInputStream through the ReadInt() …
Encrypt By javascript and decrypt by Java
I use AES encryption in my react-native app as below Out come= encrypted: aK7+UX24ttBgfTnAndz9aQ== following is the code I use in my backend using java for get the decrypt output= decryted : = 123456[][][][][][][][][][] Iam getting out put as 16 bit as above. what I want is out put should come as only 123456.…
Display output of two different Threads in two separate JavaFx TextArea’s
Hello guys so i have to make two threads that sell train tickets simultaneously and display there output on two different windows, i have create a class that generates the tickets and a Runnable but i am not sure how to display the output of the two different threads in the two different Text area boxes i hav…
Room compile problem – column references a foreign key but it is not part of an index
I’m new to android app development and am creating an app that has Trips which stores Locations. I’m getting a compile error :”trip_Id column references a foreign key but it is not part of an index. This may trigger full table scans whenever parent table is modified so you are highly advised…
Convert an existing Flutter Kotlin project to Flutter Java project
I created a Flutter project using default values, which are Kotlin for Android and Swift for iOS. Halfway through the project I needed to integrate a 3rd party Android SDK that requires Java. Can I convert a Flutter project to Java for Android after creation? I know I will need yo use Platform Channels to int…
Is it better practice to use static factory methods over an interface implemented by many different objects? [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 3 years ago. Improve this question It seems as though you could either use static factory methods or you…
How to ensure uniqueness when elasticsearch is inserted in multithreading？
We have some documents of elasticsearch . The uniqueness of the document is determined by some fields together, how to ensure uniqueness when java multi-threading determines whether it exists and is inserted. I didn’t know what good method I had before, so I wrote a method: I guess if it exists, if it d…