Getting the name of a method parameter

by

Parameter names are available if you have told the compiler to include them (compile with debug information). Spring has ParameterNameDiscoverer which can help you obtain the names. The default implementation uses asm ClassReader to do so.

With javac you should include the -g argument to include debug information. With Eclipse I think it is there by default; it can be configured using the preferences: Java -> Compiler and then enable “Store information about method parameters (usable via reflection)” (see also this answer).

Some frameworks use this. For example spring-mvc has @RequestParam which defaults to the param name, if resolvable. It also supports explicit naming – @RequestParam("foo") in case no debug information is provided.

More Related Contents:

  1. How do I programmatically compile and instantiate a Java class?
  2. Modify a class definition’s annotation string parameter at runtime
  3. Java Reflection Performance
  4. Can I obtain method parameter name using Java reflection?
  5. How to solve InaccessibleObjectException (“Unable to make {member} accessible: module {A} does not ‘opens {package}’ to {B}”) on Java 9?
  6. Get all of the Classes in the Classpath
  7. List of useful environment settings in Java
  8. How to convert a Java object (bean) to key-value pairs (and vice versa)?
  9. Copy all values from fields in one class to another through reflection
  10. Getting Class type from String
  11. Getting value of public static final field/property of a class in Java via reflection
  12. Running a java program from another java program
  13. How can I compile and deploy a java class at runtime?
  14. Generic support for ISO 8601 format in Java 6
  15. String replacement in java, similar to a velocity template
  16. Accessing Java static final variable value through reflection
  17. Dumping a java object’s properties
  18. Java Reflection: Why is it so slow?
  19. Find out which classes of a given API are used
  20. Disable Java reflection for the current thread
  21. Where is the “server log” for Tomcat when running externally from IntelliJ Ultimate?
  22. What’s the best way to get a Class object for an array type?
  23. Runtime.exec on argument containing multiple spaces
  24. Java getMethod with subclass parameter
  25. How JVM stack, heap and threads are mapped to physical memory or operation system
  26. Using reflection in Java to create a new instance with the reference variable type set to the new instance class name?
  27. How to invoke a method in java using reflection
  28. Using reflection to change static final File.separatorChar for unit testing?
  29. Create new object using reflection?
  30. Get the class instance variables and print their values using reflection

Leave a Comment