Constructors in Java (Rules)

Ø  Name of the constructor should be same as class name.

Ø  Constructor can have arguments.

Ø  New operator is use to create memory at run time.

Ø  Compiler placed a default constructor in class if user does not write any constructor in class.

Ø  Constructor does not have any return type though it returns the instance of a class.

Ø  Default constructor is provided by compiler.

Ø  If user provide any constructor, then compiler will not generate default constructor.

Ø  Constructor are auto executed when we want to execute a particular code whenever we create and object.

Ø  Constructor are used to initialize instance variable.

Ø  Constructor chaining will be achieve with the help of THIS keyword and THIS should be the first line In the constructor.