Does `kotlin-stdlib-jre8` always include `kotlin-s...

# announcements

[roberto.guerra]

Does kotlin-stdlib-jre8 always include kotlin-stdlib-jre7, and if so, does it do any harm to use excludes to leave out jre7 from the runtimeClasspath?

runtimeClasspath - Runtime classpath of source set 'main'.
+--- org.slf4j:slf4j-api:1.7.22
+--- org.jetbrains.kotlin:kotlin-stdlib-jre8:1.1.4
|    +--- org.jetbrains.kotlin:kotlin-stdlib:1.1.4
|    |    \--- org.jetbrains:annotations:13.0
|    \--- org.jetbrains.kotlin:kotlin-stdlib-jre7:1.1.4
|         \--- org.jetbrains.kotlin:kotlin-stdlib:1.1.4 (*)

[robinho]

Why do you need to remove it?

[roberto.guerra]

Just finding ways to slim down the jar file.

[roberto.guerra]

And it also puzzles me that jre8 includes jre7.

[Ruckus]

Why does it puzzle you? Java 8 includes all the changes to Java 7

[roberto.guerra]

Exactly

[roberto.guerra]

so why include both if jre8 includes jre7?

[Ruckus]

The kotlin-stdlib-jreN does not include the the JRE, just some helpful methods to interface with the changes. If they already have all the changes for Java 7 in the jre7 library, why would they write them all again when they can just include them with the jre8 library?

[roberto.guerra]

Thanks, that explains it. I knew it wasn’t the JRE itself, but was just confused. I assumed that just like the JRE, the kotlin-stdlib-jreN would “look” the same. For example, when I install the jre8, I don’t need to also install the jre7. But your explanation clarifies my confusion.