A class with getters and setters in Java in order to use it as an Object in an Array of them

Person.java

public class Person {
  
  //attributes of the class
  private String FirstName,
                LastName;
                
  private Integer Age, 
                 Phone;
  
//Constructors for this class
  public Person(){
    this.FirstName = null;
    this.LastName  = null;
    this.Age       = null;
    this.Phone     = 0;
  }

  public Person(String FirstName, String LastName, Integer Age, Integer Phone){
    this.Firstname = Firstname;
    this.LastName  = LastName;
    this.Age       = Age;
    this.Phone     = Phone;
  }
  
  //Methods for the full name
  public void setName(String FirstName, String LastName){
    this.FirstName = FirstName;
    this.LastName  = LastName;
  }
  
  public String getName(){
  	return this.FirstName + " " + this.LastName;
  }
  
  //Setters for the attributes
  
  public void setFirstName(String FirstName){
  	this.Firstname = FirstName;
  }
  
  public void setLastName(String LastName){
  	this.LastName = LastName;
  }
  
  public void setAge(Integer Age){
  	this.Age = Age;
  }
  
  public void setPhone(Integer Phone){
  	this.Phone = Phone;
  }

// Getters for each of them

  public String getFirstName(){
  	return this.FirstName;
  }
  
  public String getLastName(){
  	return this.LastName;
  }
  
  public Integer getAge(){
  	return this.Age;
  }
  
  public Integer getPhone(){
  	return this.Phone;
  }
  
  //Overwriting the method toString
  
  public String toString(){
  	return this.Firstname + " " + this.LastName + " | " + " Age: " this.Age + " | " + " Phone: " + this.Phone;
  }
  
// The use of the keyword "this" is very important because it refers to the attribute of the object not a variable
  
}