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Get method parameter names in java


The getParameters() method is used to method parameters in java.

Example

TestClass.java

package com.codesjava;
 
public class TestClass {
	public void display(String message){
		System.out.println(message);
	}
}

ReflectionTest.java

package com.codesjava;
 
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
 
public class ReflectionTest {
	public static void main(String args[]){
		try {
			Class c=Class.forName("com.codesjava.TestClass");  
			Method method = c.getMethod("display", String.class);
			Parameter[] parameters = method.getParameters();
			//We can also use getParameterTypes() to get parameter type list
			for(int i=0; i<parameters.length; i++){
				System.out.println("Parameter name: " + parameters[i].getName());
				System.out.println("Parameter Type: " + parameters[i].getType());
			}
		} catch (Exception e) {
			e.printStackTrace();
		}  
	}
}

Output

Parameter name: arg0
Parameter Type: class java.lang.String
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