Additional Notes
Why can using MethodHandle.invokeExact with an incorrect method signature become a real problem?
Track: Java
Topic: Reflection API
Focus: MethodHandles
Java: MethodHandles
Answer
A WrongMethodTypeException is thrown. Frame the concept in practical terms so you can explain it during interview discussion.
MethodHandle.invokeExact requires that the method's signature matches exactly the expected parameter types and return type. This strictness ensures that there's no ambiguity or runtime type conversion, contributing to its performance benefits. For example, if you expect a method to take an integer and a string, both types must match perfectly at invocation time.
MethodHandle.invokeExact requires that the method's signature matches exactly the expected parameter types and return type. This strictness ensures that there's no ambiguity or runtime type conversion, contributing to its performance benefits. For example, if you expect a method to take an integer and a string, both types must match perfectly at invocation time.
Topics: Java MethodHandles Reflection API