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Method Name
Every method should be provided with a name, so that it can be called from same class or different
classes. Method name should be a valid identifier. The method name should be meaningful and related
to the task done by it. For example,

public int sum (int i, int j)

Parameter List
One or more parameters are passed to a method within the pair of parentheses while defining the
method. There are data types along with variable names are passed to the method as parameters.
These parameters are separated by comma. For example,

public int sum (int i, int j)

The values of these parameters are passed at the time of calling the method in the same order in
the parameters are defined in the definition of the method. In some methods, there may not be any
parameter which may be known as empty parameter list. For example,

public int sum ()

Body of the Method
The body of a method is defined by the curly brackets. Inside the curly brackets, a set of statements
are defined to perform the desired task. When a method is called, the statements written inside the
curly brackets are executed. For example,

public int sum (int i, int j)
{
int s=a + b;
Body of the Method
return s;
}

INTRODUCING CONSTRUCTOR

A constructor is a type of special member method with same name as of class. However, it is different
from a member method as it does not have a return type. A constructor is used to initialize the
instance variables of the class. It is also used to initialise the object of the class. The syntax to define a
constructor is:

class <name of class>

{
Data members……
<name of class>() //constructor

{
job of the constructor like initialising the data members
}

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