Fall 2016
Assignment No. 01
Semester: Fall 2016
Web Design and Development -CS506 
Total Marks: 20

Due Date: November 21,

Please read the following instructions carefully before submitting assignment:
§  You should submit your assignment before or on due date on VULMS.
§  Your assignment should be your own work. It should not be copied from internet, handouts or books.
§  You are suggested to use Netbeans IDE for developing your assignment.
§  You should import java swing and math packages in your classes.
§  You should create project with your Roll No. in Netbean IDE and create required classes.
§  You should zip your complete project (along with .java,.class and .jar files etc.) and upload on VULMS as a single file.
§  Your zipped file should be in .zip or .rar file format only. Any compressed format other than .zip or .rar of your programs will be considered the incorrect files and rewarded by zero. 
§  Assignment sent via Email will not be replied and accepted in any case.
If the submitted assignment does not open or file is corrupt, it will not be marked and awarded Zero marks.

To build understanding towards building classes along with its related methods
To know how to write default and parameterized constructors
To write user-defined methods in classes and invoke them To take user input using Graphical User Interface (GUI)

                   For any query about the assignment, contact at CS506@vu.edu.pk

Question:   20 marks

Write a java program to prompt the user to take the input in a double variable for the radius of a sphere, and call method sphereVolume() to calculate the volume of the sphere. 

Use the following statement to calculate the sphere volume:

Double volume = (4.0 /3.0) * Math.PI * Math.pow(radius, 3)


You should define two public classes Sphere and SphereTest. The Sphere class will contain the calculation procedure of sphere along with data members and getter / seyter methods. SphereTest class will contain the main method and use the object of first class to call its method. 

Your program should have a separate print() method for displaying the volume of the sphere. 

You should ensure that input value for radius should not be negative nor 0. In such cases, re-prompt 

user to input again.

You should parse the input into related primitive data type using Wrapper classes, if required.

You should pass the user input to parameterized constructor. 

You should write a default constructor that would set the value for radius to 1.0 for Sphere class.


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