Yes it is possible to call on constructor from another. But there is a rule to it. If a call is made from one constructor to another, then

that new constructor call must be the first statement in the current constructor

public class Product { private int productId; private String productName; private double productPrice; private String category; public Product(int id, String name) { this(id,name,1.0); } public Product(int id, String name, double price) { this(id,name,price,"DEFAULT"); } public Product(int id,String name,double price, String category){ this.productId=id; this.productName=name; this.productPrice=price; this.category=category; } } 

So something like below will not work.

public Product(int id, String name, double price) { System.out.println("Calling constructor with price"); this(id,name,price,"DEFAULT"); } 

Yes it is possible to call one constructor from another. But there is a rule to it. If a call is made from one constructor to another, then

that new constructor call must be the first statement in the current constructor

public class Product { private int productId; private String productName; private double productPrice; private String category; public Product(int id, String name) { this(id,name,1.0); } public Product(int id, String name, double price) { this(id,name,price,"DEFAULT"); } public Product(int id,String name,double price, String category){ this.productId=id; this.productName=name; this.productPrice=price; this.category=category; } } 

So, something like below will not work.

public Product(int id, String name, double price) { System.out.println("Calling constructor with price"); this(id,name,price,"DEFAULT"); } 

Also, in the case of inheritance, when sub-class's object is created, the super class constructor is first called.

public class SuperClass { public SuperClass() { System.out.println("Inside super class constructor"); } } public class SubClass extends SuperClass { public SubClass () { //Even if we do not add, Java adds the call to super class's constructor like // super(); System.out.println("Inside sub class constructor"); } } 

Thus, in this case also another constructor call is first declared before any other statements.

Yes it is possible to call on constructor from another. But the rule is that, if a call is made from one constructor another, then

the Constructor call must be the first statement in the constructor

public class Product { private int productId; private String productName; private double productPrice; private String category; public Product(int id, String name) { this(id,name,1.0); } public Product(int id, String name, double price) { this(id,name,price,"DEFAULT"); } public Product(int id,String name,double price, String category){ this.productId=id; this.productName=name; this.productPrice=price; this.category=category; } } 

So something like below will not work.

public Product(int id, String name, double price) { System.out.println("Calling constructor with price"); this(id,name,price,"DEFAULT"); } 

Yes it is possible to call on constructor from another. But there is a rule to it. If a call is made from one constructor to another, then

that new constructor call must be the first statement in the current constructor

public class Product { private int productId; private String productName; private double productPrice; private String category; public Product(int id, String name) { this(id,name,1.0); } public Product(int id, String name, double price) { this(id,name,price,"DEFAULT"); } public Product(int id,String name,double price, String category){ this.productId=id; this.productName=name; this.productPrice=price; this.category=category; } } 

So something like below will not work.

public Product(int id, String name, double price) { System.out.println("Calling constructor with price"); this(id,name,price,"DEFAULT"); }