Generic type of local variable at runtime

Question

Is there a way in Java to reflect a generic type of a local variable? I know you can do that with a field - Get generic type of java.util.List. Any idea how to solve, for instance:

public void foo(List<String> s){
  //reflect s somehow to get String
}

Or even more general:

public void foo<T>(List<T> s){
  //reflect s somehow to get T
}

Answer 1

No. Due to Java's Type Erasure, all generics are stripped during the compile process.

You can however use instanceOf or getClass on elements in the list to see if they match a specific type.