Streams should be built in collections, not a .stream().map(…).toList() convolution. In know its incompatible with weird frameworks who already overloaded the .map() method, but well… let them recompile.

That was in 2008, we’d be happy by now; and Java had no qualms asking everyone to change the package names from javax’ to jakartax’ in Java 21, so they should have issued a java.collections package and deprecated the lists i java.utils.

If v’s type can be inferred, you don’t need to give that extra hint to the type checker, likewise for 1..5. And Java Streams’ toList produces an immutable list.