The document discusses methods in Java. It defines a method as taking input, performing actions, and producing output. It notes that methods are defined within classes and have a general form of return type name(parameter list){method body}. The document provides an example of a main method with no parameters and an example of a class with a volume method that calculates and returns the volume of a box based on width, height, and depth fields.

2. Daffodil International University
 Submitted By
Niloy Biswas (171-35-225)
 Submitted to
 S A M Matiur Rahman
Associate Head
Department of SWE
Daffodil International University

3. Methods
 A program that provides some functionality can be long and
contains many statements
 A method takes input, performs actions, and produces output
 In Java, each method is defined within specific class

4. General from of Method
Int square ( int num1, int num2){
//body of method
}
Type name parameter

5. General from of Method
• The parameter list is a sequence of type and identifier pairs separated by
commas.
• Parameters are essentially variables that receives the value of the arguments
passed to the method when it is called.
• If the method has no parameters, then the parameter list will be
empty.
• Methods that have a return type other than void return a value to the calling
routine using the following form of return statement.

6. Method declaration
public static void main (String[ ] args){
System.out.println(“This is method body”);
}
ParameterModifier Modifier ReturnType Nameof Method
Methodbody

7. Adding a Method to class
class Box{
float width;
float height;
float depth;
float volume() {
return width * height * depth;
}
}