java.lang.reflect.Method.getParameterTypes() Method Example

Description

The java.lang.reflect.Method.getParameterTypes() method returns an array of Class objects that represent the formal parameter types, in declaration order, of the method represented by this Method object. Returns an array of length 0 if the underlying method takes no parameters.

Declaration

Following is the declaration for java.lang.reflect.Method.getParameterTypes() method.

public Class<?>[] getParameterTypes()

Returns

the parameter types for the method this object represents.

Example

The following example shows the usage of java.lang.reflect.Method.getParameterTypes() method.

package com.tutorialspoint;

import java.lang.reflect.Method;

public class MethodDemo {
   public static void main(String[] args) {

      Method[] methods = SampleClass.class.getMethods();
      Class[] parameterTypes = methods[1].getParameterTypes();

      for(Class parameterType: parameterTypes){
         System.out.println(parameterType.getName());   
 
      }
   }
}

class SampleClass {
   private String sampleField;

   public String getSampleField() {
      return sampleField;
   }

   public void setSampleField(String sampleField) {
      this.sampleField = sampleField;
   } 
}

Let us compile and run the above program, this will produce the following result −

java.lang.String