Java Reflection for Fields

Create Entity Class

Create entities package and create new class named Student as below:

package entities;

public class Student {

	private String id;
	private String name;
	private int age;
	public String address;
	public String email;

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public Student() {
	}

	public Student(String id) {
		this.id = id;
	}

	public Student(String id, String name) {
		this.id = id;
		this.name = name;
	}

	public Student(String id, String name, int age) {
		this.id = id;
		this.name = name;
		this.age = age;
	}

}

Run Application

package reflection;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import entities.Student;

public class Main {

	private static void displayAllFields(Student student) {
		Class studentClass = student.getClass();
		Field[] fields = studentClass.getFields();
		System.out.println("Count Fields: " + fields.length);
		for (Field field : fields) {
			System.out.println("Field Name: " + field.getName());
			System.out.println("Field Type: " + field.getType().getName());
			System.out.println("============================");
		}
	}

	public static void main(String[] args) {

		Student student = new Student();
		displayAllFields(student);

	}

}

Output

Count Fields: 2
Field Name: address
Field Type: java.lang.String
============================
Field Name: email
Field Type: java.lang.String
============================