Is there a way to typecast interface using Jpype?

I am trying to call Java code from Python using Jpype and trying to implement Interface using JProxy for callbacks. It is giving me error that “TypeError: Cannot create Java interface instances&…

trying to convert Java RSA-PSS signature verification code (with SHA256 hash, SHA1 MGF hash) to Python

Here’s my Java code, which successfully verifies the signature, as expected. Signature sig = Signature.getInstance(“RSASSA-PSS”); PSSParameterSpec pssParams = new PSSParameterSpec( “…

Algorithm to show how far away a value is from another

Disclaimer: This is a very very difficult question about mathematics and algorithms (in my opinion) – so respect to anyone who makes this. I admire you. I would like to evaluate the performance of my …

How to run python voice recognition script in Java (Android Studio)?

I’ve searched quite a bit on this topic, looking at options like Jython and Chaquopy, but whatever I do, there is always an error. What I’m looking to do is, when a button on my Android app is clicked,…

How to use ElasticSearch JSON DSL in Java?

I’m working on a springboot project and having some trouble with ElasticSearch. The user will put some JSON-format elasticsearch DSL query strings in the database and they are black-box to me. What I …

Extract values from complicated JSON based on a specific condition using Java or Python [closed]

I am totally new to JSON. I have a JSON file that contains the following format: {“A”: {“B”:[ {“C”:{“text”:”Command X”,”meaning&…

Java sort string array using Array.sort() like python’s sorted with key=lambda x:

I’m occasionally learning Java. As a person from python background, I’d like to know whether there exists something like sorted(iterable, key=function) of python in java. For exmaple, in python I can …

Avoid using extends and implements in my class

I am brand new to Java and need to use one of the following class definitions in my project. import androidx.fragment.app.Fragment; public class ScannerFragment extends Fragment implements …

How to resolve (java.lang.ClassNotFoundException: com.mongodb.spark.sql.DefaultSource.DefaultSource) in pyspark i’m using pycharm

With Pycharm I’m getting this error: java.lang.ClassNotFoundException: com.mongodb.spark.sql.DefaultSource.DefaultSource How can I resolve this issue? I tried: spark = SparkSession.builder.config(&…

How to make this recursive function faster in Python or Java?

I have this recursive function: F(n)=4F(n-1)+F(n-2), for all n>=2, where F(0)=0 and F(1)=1. This is my code in python def f(n): res = 0; if n == 0: return 0 elif n == 1: …