Creating Objects

                 Creating objects means to allocate memory space for all the instance variables of the objects. Step to create an object are,

1. Declare an object.

2. Define the object using new operator. The new operator dynamically allocates memory for an object and returns a reference to it.

The general form is

1. Declare an object.

2. Define the object using new operator. The new operator dynamically allocates memory for an object and returns a reference to it.

The general form is

classname obj; obj=new classname();

Where

                classname           -              defined classname

                obj                         -              name of the object

                new                       -              keyword

Example

Student s1;  //this declares an object s1 of type student.

S1=new Student(); //this allocates memory space for object s1.

                 

The following figure shows the representation of student object in the memory.

Statement                                           Effect

Student s1;                                         s1

S1=new Student();                         

                The above two steps can be combined into one step as,

                Student s1=new Student();