Hi All ,I just started my career as backend engineer, what all things should I learn and where can I find best advance java documentation/ course. Also I believe in learning through application and project. where can I search for open source projects to which I can contribute and learn.🙂 Thanks

Hey, I just added an awesome day-night mode switch in my Android Library toggle, must have a look : https://github.com/Angads25/android-toggle

If someone could help with this: If someone could help with this: https://stackoverflow.com/questions/52791713/roomandroid-foreign-key-constraint-failed-on-deletion

Does anyone know how

tailrec

keyword works . I mean how it converts the tail call optimised recursion to iterative one

Can’t we access Inline Value class fields from Java? In the below example I don’t get any compiler error but fails at runtime with

error: cannot find symbol

# Kotlin Value class

import io.vavr.control.Either
import io.vavr.kotlin.right

@JvmInline
value class Name(val s: String) {
    val length: Int
        get() = s.length
}

fun getAsName(): Either<String, Name> = right(Name("Kotlin"))

# Java Client

@Test
void testValueClass() {
  final var name = getAsName().get();
  Assertions.assertEquals(0, name.getLength());
}

# Error

error: cannot find symbol
    Assertions.assertEquals(0, name.getLength());
                                   ^
  symbol:   method getLength()
  location: variable name of type Name

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If anybody facing this issue ContentResolver Cursor value returns a NULL In Android Stock OS throws SecurityException: Permission Denial: opening provider

I have a problem receiving a media file from the Gallery app or any file manager to my app.

Can someone help me understand what does this exception mean. I am trying to use

CollectionsKt

method directly in java and run this in a unit test. However this static import is causing this exception

import static kotlin.collections.CollectionsKt.chunked;

However, if I use

CollectionsKt.chunked(…)

without the static import, I don’t get this exception:

java.lang.IllegalAccessError: failed to access class kotlin.collections.CollectionsKt___CollectionsKt from class billing.batch.invoice.services.tax.TaxIntegrator (kotlin.collections.CollectionsKt___CollectionsKt and billing.batch.invoice.services.tax.TaxIntegrator are in unnamed module of loader org.powermock2.core.classloader.javassist.JavassistMockClassLoader @5443d039)

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Hi guys, have any of you an experience working on a project (maybe a project consisting of multiple of microservices) with mix of Java and Kotlin? How would this work in a long run? Would that be a great or rather horrible mix of languages in one code base? Would you recommend using Kotlin and Java side by side, rewrite everything to Java or rewrite everything to Kotlin?

Hey has someone ever caught this error?

java.lang.InternalError: java.io.FileNotFoundException: /Library/Java/JavaVirtualMachines/adoptopenjdk-11.jdk/Contents/Home/lib/currency.data (No such file or directory)

I’ve looked at this but couldn’t find much

Hi there. is there a way to force kotlin to not use getter convention when accessing a property? I have a transitive depenency that has

getLogging()

in 1 version and just a property called

logging

in the next, and when i compile against the former, running against the latter fails b/c its looking for a getter method still

Hey , i have a data class and it is complaining about no default constructer for entity , i tried of having jpa plugin but none worked for me

Hi all. I have a legacy Java library, which targets Java 8, and which has methods taking Map arguments. How can I patch this library so that when using it from kotlin, the Map arguments are seen as immutable maps?

Hi, Can some one help with foreign api in java 22 ? This code is working in with java 21.

var POINT_2D: MemoryLayout = MemoryLayout.structLayout(
    JAVA_DOUBLE.withName("x"),
    JAVA_DOUBLE.withName("y")
)

val handle_x: VarHandle = POINT_2D.varHandle(PathElement.groupElement("x"))
val handle_y: VarHandle = POINT_2D.varHandle(PathElement.groupElement("y"))

// This doesn't work in java 22
fun main() {
    Arena.ofConfined().use { arena ->
        val point = arena.allocate(POINT_2D)
        handle_x.set(point, 11)
        handle_y.set(point, 22)

        handle_x.get(point).also { println(it) }
        handle_y.get(point).also { println(it) }

    }
}