Using Reflection API for getting fields name and type of objects in Java

Program to demonstrate Usage of Reflection API for getting fields name and type in Java

package com.hubberspot.example;

import java.lang.reflect.Field;

class Employee {
 public String firstname;
 protected String lastname;
 private String email;
 static int counter;
}

public class EmployeeTest {

   public static void main(String[] args) {

 // Create a test object. We can create
 // and apply reflection on any class 
 // we want without knowing which fields
 // it has. We are taking Employee here. 
 Employee employee = new Employee();

 // Getting Class associated with Employee
 Class employeeClass = employee.getClass();  

 System.out.println("-----------------------------------");

 try {
 // Using Field class we can get field of any
 // class we want. Here we are getting field
 // firstname by calling getField method of the
 // Class associated with Employee with public specifier 
 Field singleField = employeeClass.getField("firstname");

 // getName returns the name of the field
 System.out.println("Field name = " + singleField.getName());

 // getType().getName() returns the type of the field
 System.out.println("Field type = " + singleField.getType().getName());

 System.out.println("-----------------------------------");

 // getDeclaredFields methods returns array of fields which
 // involve all fields irrespective of access specifier such as
 // public, private, protected and default
 Field[] declaredFields = employeeClass.getDeclaredFields();
 System.out.println("Number of fields = " + declaredFields.length);

 for (Field field : declaredFields) {
           System.out.println("Field name = " + field.getName());
    System.out.println("Field type = " + field.getType().getName());   
 }

 System.out.println("-----------------------------------");

 // getFields methods returns array of fields which
 // involve fields only with access specifier as public
 Field[] fields = employeeClass.getFields();
 System.out.println("Number of fields = " + fields.length);

 for (Field field : fields) {
    System.out.println("Field name = " + field.getName());
    System.out.println("Field type = " + field.getType().getName());
 }

    } catch (SecurityException e) {

  e.printStackTrace();
    } catch (NoSuchFieldException e) {

  e.printStackTrace();
    }

  }

}

Output of the program :