JAVA OBJECTS

   An Object in Java is essentially a block of memory that contains space to store all instance variables. Creating an object is also referred as instantiating an object.

    Obtaining object of a class is a two step process:

o   First, declare a variable of the class type.

o   Second, acquire an actual, physical copy of the object and assign it to the variable. This can be done by using the new operator.

o   Ex:Myclass c= new Myclass();

The above statement combines two steps as shown below:

Myclass c;//Declarereference to object

c= new Myclass(); //allocate a Myclass object

   














The advantage of using the new operator is allocate memory at run time is that the program can create as many or as few objects as it needed during the execution of the program.

o   Since the memory is finite, it is possible that new will not be able to allocate memory for an object because insufficient memory exists. If this happens a run time exception will occur.

   Assigning Object Reference Variables:In Java it is possible to create two or more references to the same object:

Myclass c1=new Myclass(); 

Myclass c2=c1;