Dumping an object in Java. I'm just simulating the var_dump method from PHP.

MainClass.java

package com.vicabreu.test;
 
import java.lang.reflect.Field;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
 
public class MainClass {
 
    private String firstName;
	private String lastName;
	private int age;
	private String birthDay;
	
	public static void main(String[] args) throws ParseException, IllegalArgumentException, IllegalAccessException{
		String firstName = "Victor";
		String lastName = "Abreu";
		String birthDay = "1983-04-11";
		
		MainClass obj = new MainClass(firstName, lastName, birthDay);
		
		// getting object dumped
		Field[] fields = obj.getClass().getDeclaredFields();
		System.out.println("\n" + obj.getClass().getSimpleName());
		for (int i=0; i<fields.length; i++)
		{
		    System.out.println("\t[" + fields[i].getName() + "] (" + fields[i].getType() + ") = " + fields[i].get(obj));
		}
		/*System.out.println("You name is " + obj.getFirstName() + " " + obj.getLastName());
		System.out.println("Your birthday is on " + obj.getbirthDay());
		System.out.println("Your age is " + obj.getAge());*/	
	}
	
	public MainClass(String firstName, String lastName, String birthDay) throws ParseException{
		this.setFirstName(firstName);
		this.setLastName(lastName);
		this.setbirthDay(birthDay);
		this.calculateAge();
	}
	
	private void calculateAge() throws ParseException{	
		Calendar todayDate = GregorianCalendar.getInstance();
	  	Calendar birthDay = GregorianCalendar.getInstance();
	  	SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
	  	todayDate.setTime(new Date());
	  	birthDay.setTime(formatter.parse(this.getbirthDay()));
	  	birthDay.add(Calendar.DAY_OF_YEAR, - todayDate.get(Calendar.DAY_OF_YEAR));
	  	int age = todayDate.get(Calendar.YEAR) - birthDay.get(Calendar.YEAR);
		this.setAge(age);
	}
 
	public String getFirstName() {
		return firstName;
	}
 
	public void setFirstName(String firstName) {
		this.firstName = firstName;
	}
 
	public String getLastName() {
		return lastName;
	}
 
	public void setLastName(String lastName) {
		this.lastName = lastName;
	}
 
	public int getAge() {
		return age;
	}
 
	private void setAge(int age) {
		this.age = age;
	}
 
	public String getbirthDay() {
		return birthDay;
	}
 
	public void setbirthDay(String birthDay) {
		this.birthDay = birthDay;
	}
	
}