Hello, I'm getting a very strange error when trying to call a function. In a certain function I've w...

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[SirNapkin1334]

Hello, I'm getting a very strange error when trying to call a function. In a certain function I've written, I've wrapped my Kotlin Strings in Java Strings to benefit from the significant speedup in java.lang.String#repeat(int) compared to kotlin.text.repeat(CharSequence, int). When I run the code in IJ, it works fine, when I call the function from Java for testing purposes, it works fine, but when I compile the jar and run it via java -jar , it throws a NoSuchMethodError , saying that there is no method java.lang.String#repeat(int). Does anyone know the cause?

[SirNapkin1334]

The function I'm calling uses Java strings so:

kt
```fun cls(size: Int) = print(java.lang.String(
	java.lang.String(" ").repeat(size * 2 + 3) + "[1F"
).repeat(size + 2))

[SirNapkin1334]

Ooops, looks like Slack doesn't support syntax highlighting for code blocks

[ephemient]

https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html#repeat(int)

Since: 11

[ephemient]

if you are running with an older Java you can't use String.repeat

[ephemient]

also, Kotlin strings are Java strings, you don't need to wrap

[SirNapkin1334]

ah, oops, i had forgotten to set my system java back version to 15!

[ephemient]

(" " as java.lang.String).repeat(10)

[SirNapkin1334]

ah, thanks, i probably should have tried that.

[ephemient]

no worries, the way in which platform types are aliased can be a bit confusing

[SirNapkin1334]

my question is, why they don't use the java implementation of that if it's available

[SirNapkin1334]

i benchmarked it and the speedup is on the order of 5x

[ephemient]

kotlin-stdlib-jvm only depends on Java 6

[SirNapkin1334]

ah