can i tell the kotlin compiler that it should not allow to use jdk methods that are not in jdk 1.8? ...

# announcements

[christophsturm]

can i tell the kotlin compiler that it should not allow to use jdk methods that are not in jdk 1.8? (that have a @since 9 annotation for example). or do i have to use 1.8 to build?

[hho]

You can point the compiler to the JDK classes to use with the -jdk-home <path> parameter.
Just using 1.8 is probably the easier way.

[christophsturm]

good idea, thanks!

[christophsturm]

btw one reason why i want this is that some jdk 9+ methods are similar to kotlin methods (InputStream.readAllBytes vs InputStream.readBytes)

[Nikky]

you can set

java {
    sourceCompatibility = JavaVersion.VERSION_1_8
    targetCompatibility = JavaVersion.VERSION_1_8
}

that should disallow 9+

[Nikky]

if i misunderstood that then i might be missing the point of that configuration though

[christophsturm]

i think thats for syntax and not for jdk