Types of Constructor in Java | Chain of Constructor

Last Updated on 5 years ago by ICT Byte

Types of Constructor

• Default Constructor
  • Doesn’t have any parameter
  • Example

Class rectangle{

rectangle(){

System.out.println(“Default Constructor”);

• No argument constructor
• Parameterized Constructor
  • Has parameter
  • When object is initialized, parameters are taken
  • Example

Class rectangle{

Int length, breadth;

rectangle(int l, int b){

length=l;

breadth=b;

}

int area(){

Destructor

• There is no destructor in java as of C++
• There is automatic garbage collector – it frees the dynamically allocated memory when there is no use

Finalize() Methods

• Works like destructor
• Opposite of constructor
• Finalize method is used – for removing object

Chain of Constructor

• Process of calling constructor from another constructor
• Can be done in two ways
  • Within same class: Using this() keyword
  • From base class : Using super() keyword
• It goes with inheritance