In Java, Generics are erased ("type erasure") at compile time. This concept introduces a problem where an abstract super class containing generics <T> will be compiled to abstract super class with "Object".
In which case implementation of this abstract class with specific Generics (say for example <String>) will cause the compiler to create Bridge Methods, in this case the someMethod(Object o) will call someMethod(String o) with an appropriate cast.
Reference [1] and [2] has a much better explanation
You won't find it in the JLS, as it is an implementation detail. But interesting none the less.
References
- [1] Medium - Bridge Methods in Java
- https://medium.com/@rohitsingh341/bridge-methods-in-java-21a9d06b6b1b
- [2] The Java Tutorials - Effects of Type Erasure and Bridge Methods
- https://docs.oracle.com/javase/tutorial/java/generics/bridgeMethods.html
