How to print exception message in Kotlin - kotlin

Question

I have defined an exception in Kotlin but when I do e.message it prints fully qualified exception name followed by message but I want to print only exception message.
public final class AbcException extends Exception {
private static final long serialVersionUID = 1L;
public AbcException() {
}
public AbcException(String message) {
super(message);
}
public AbcException(String message, Throwable cause) {
super(message, cause);
}
public AbcException(Throwable cause) {
super(cause);
}
}
I am matching asserting it in tests and want to do
assertEquals(e.message, "CaseItem delete failed: item token=token1")
But I am doing this because it prints fully qualifies exception name too
assertTrue(e.message?.contains("Case Item tokens=token2 does not exist.")!!)
Expected
"Some message"
Actual
"exceptionClass: Some message"

Answer 1

That's not Kotlin, it's Java.
The equivalent Kotlin exception would look something like this:
class AbcException(
message: String? = null,
cause: Throwable? = null
) : Exception(message, cause) {
// Bit odd to have an exception that wraps a cause with no message, but ok.
constructor(cause: Throwable): this(null, cause)
}
The playground test does as expected, only prints the message, excluding the exception type name:
fun main() {
try {
throw AbcException("Hello")
} catch(e: Exception) {
println(e.message)
}
}
Hello