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| Articles > Misc > How to get method parameter names using Java reflection | |
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How to get method parameter names using Java reflection
Author: Venkata Sudhakar
The below example shows how to get method parameter name using Java reflection. In Java 8 and above you can include debugging information about method parameters by compiling with -parameters compiler flag.
01 | package com.bethecoder.java.reflection; |
03 | import java.lang.reflect.Method; |
04 | import java.lang.reflect.Parameter; |
06 | public class ParamNamesExample { |
08 | public static void main(String[] args) throws Exception { |
09 | for (Method declaredMethod : Calculator.class.getDeclaredMethods()) { |
10 | for (Parameter parameter : declaredMethod.getParameters()) { |
11 | System.out.println(parameter.getName()); |
16 | private static class Calculator { |
17 | public static int add (int first, int second) { |
18 | return first + second; |
Output without -parameters compiler flag,
arg0
arg1
Output with -parameters compiler flag,
javac -parameters ParamNamesExample.java
first
second
Maven users can try the following compiler plugin configuration
01 | <groupId>org.apache.maven.plugins</groupId> |
02 | <artifactId>maven-compiler-plugin</artifactId> |
03 | <version>3.7.0</version> |
07 | <encoding>UTF-8</encoding> |
09 | <arg>-parameters</arg> |
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