Attempting to run java app from gdb results in segfault, yet running app alone does not. This app is a .JAR which uses JOGL and a bit of memory-mapping to talk to the GPU. Stacktrace below hints at …
RealmObject AND Parcelable
I’m new to Realm for Android so I’m not sure I’m approaching this the right way. I have a class which looks like this: The problem is the Parcelable interface contains methods like describeContents() writeToParcel() and RealmObjects aren’t supposed to have methods other than getters an…
Java 8 stream map on entry set
I’m trying to perform a map operation on each entry in a Map object. I need to take a prefix off the key and convert the value from one type to another. My code is taking configuration entries from a Map<String, String> and converting to a Map<String, AttributeType> (AttributeType is just a …
Matlab filtfilt() function implementation in Java
Has anyone tried implementing matlab’s filtfilt() function in Java (or at least in C++)? If you guys have an algorithm, that would be of great help. Answer Here is my implementation in C++ of the filtfilt algorithm as implemented in MATLAB. Hope this helps you.
Access static method from classes loaded by different ClassLoaders
I have two classes (A and B) which are loaded by different ClassLoaders. Furthermore, I have a third class, which providers static getter and setter methods. I hope following picture can clarify the situation: The Data class looks as following: In class A, I want to set the static value of Data and in B I wan…
Are lambdas garbage collected?
If I’m not mistaken, under certain situations a lambda in Java is generated as an anonymous class instance. For example, in this code the lambda needs to capture a variable from the outside: Does it means that the garbage collector will claim the lambda as an object? Answer No it won’t; this is no…
contains() method not working as expected
I am building a voice assistant for android, here this method retrieves contact names one by one and compares it to to SpeechToText input. I am successfully getting the contact names, but when I am comparing it with my input text, nothing is happening. Here is the code Here for example I sending “call k…
Unexpected runtime error placement in simple Java code
I generated the following code for a multiple choice question on an exam: The output I expected was: The output I received was very close to that, but out of order: It did get that last true value, but it got it after the exception began. And while, on some level I suppose this is a silly question (because th…
How to set a Spring profile to a package?
I want to set a profile name to a whole package and I don’t know how. If where is no easy way then I have to mark every class in the package and sub packages with @Profile annotation. <context:component-scan/> tag does not support attribute like profile so I have no idea. Answer If you don’t…
GSON Integer to Boolean for Specific Fields
I’m dealing with an API that sends back integers (1=true, other=false) to represent booleans. I’ve seen this question and answer, but I need to be able to specify which field this should apply to, since some times an integer is actually an integer. EDIT: The incoming JSON could possibly look like …