hello, I have a question which java bytecode does ...

# android

[mingkangpan]

hello, I have a question
which java bytecode does kotlin compiler targets per default? java 6?
does it make the compiler faster if I say I target java 8?
with

compileKotlin {
    kotlinOptions {
        jvmTarget = "1.8"
    }
}

our android app supports min android SDK 21

[gildor]

Java 6 by default

[gildor]

No it will not be faster, I don’t know any potential improvement 6 vs 8

[gildor]

also SDK 21 doesn’t support any Java 8 features (neither bytecode level nor library level)

[kenkyee]

java version also doesn't matter unless you use specific features that require SDK24 like default interface methods in Java. Doesn't affect Kotlin at all though.

[gildor]

With sdk24 and java you also can use @JvmDefault annotation, but this make sense only for compatibility with some java code usually useful only for libraries and java interop