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 …
Tag: python
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: I also tried setting the classpath of the jars also .bash_profile: I had many jars in my_jars but still didn’t get it to work. I keep gett…
Kivy on Android, JVM exception occurred: Attempt to invoke virtual method … on a null object reference
We’re trying to access the Android camera in the Kivy app we’re building. We first opted to use plyer but we were getting a ClipData.Item.getUri() error. We ended up trying to follow the details described here: https://github.com/kivy/plyer/issues/500#issuecomment-565532048 Now there seems to be a…
Chaquopy in Android Studio module not found
I have implemented Chaquopy into my Android app to make use of pre-trained Neural Network models in python. Trying to call the python code, I am encountering; “com.chaquo.python.PyException: ModuleNotFoundError: No module named ‘DataLoader’ I am unsure if I have wrongly implemented the file …
Passing parameters from Java to Python using Jython
I am passing string values to a python script using Jython. In my program, I do this several times. However, during a test I am running to see if the class that sends the parameters is working properly, I see that the python script outputs the same string values as the initial inputs. Here is the Java class: …
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: …
How to get a jar file from nexus using Jenkins?
I have a Jenkins job which contains 3 parameters: ARTIFACT_ID, GROUP_ID, and APP_VERSION. I would like to use those 3 params to download any specific jar file from Nexus. Note that the Nexus URL is provided in the Jenkins config, so it will automatically know from where to lookup. Do you have an idea how to d…
Python very slow as compared to Java for this algorithm
I’m studying algorithms and decided to port the Java Programs from the textbook to Python, since I dislike the Java overhead, especially for small programs, and as an exercise. The algorithm itself …
Efficient implementation for: “Python For Else Loop” in Java
In Python there is an efficient for .. else loop implementation described here Example code: In Java I need to write more code to achieve the same behavior: Is there any better implementation similar to Python for .. else loop in Java? Answer It’s done like this:
Call and receive output from Python script in Java?
What’s the easiest way to execute a Python script from Java, and receive the output of that script? I’ve looked for different libraries like Jepp or Jython, but most appear out of date. Another problem with the libraries is that I need to be able to easily include a library with the source code (t…