I'm getting UnsupportedOperationException crash on live app. All the crashes are associated with Samsung Fold Android 14 devices. But still no clue how to reproduce or fix this. Any help would be a...

I try to add objects to a List<String> instance but it throws an UnsupportedOperationException. Does anyone know why? My Java code: String[] membersArray = request.getParameterValues('membe...

I'm having trouble with Java FX i'm currently trying to serialize an object and for that i'm creating a class that convert object from javaFX to serializable object. But when i'm trying to load bac...

Regarding the Map<K,V> interface: Why does keySet() return a Set that supports the remove operation but doesn't support add() and addAll() operations?

I have this: import java.util.Arrays; import java.util.List; import java.util.ArrayList; public class ListTest { public static void main(String[] args) { String[] values = { "yes", "no"}; L...

I am using Java 7 File API. I wrote a class that is working fine on Ubuntu creating directories perfectly, but when I run same code on Windows then it is throwing error: Exception in thread "main"...

I had quite a big list of numbers. I needed to apply some operation on them, then take only those results that satisfy some condition. The list is sequential, so once I find the number that does no...