q1 : restaurant.java
You have been assigning a task to develop a software to keep track of customer for a restaurant, menu detail of the restaurant. For auditing purpose you also want to keep record of the order history of customer and total sale of the restaurant.
q2 : spindle.java
Design of Spindle Speeds of Machine Tools:
The rotational speed, that is, revolution per minute, of spindles of machine tools such as drilling machines or a lathe is designed in geometric progression. Let us assume S1, is the minimum speed, S2 the maximum speed, and n is the number of speeds. The ratio of any two consecutive speeds is the constant geometric ratio R. Thus the n speeds may be written as:
In program, the user has to enter the values of s1=minspeed, s2=maxspeed, and n. The user may make a mistake while entering the values; for example, user may enter zero or less than zero for s1 or s2 or may enter n=1 or less than one. The program takes care of these by throwing appropriate exception. Since the exception are the programmer’s exception, we define the class MyException that extends the standard exception class and defines the exception.
q3 : book_isbn.java
Design a class called ISBN to represent an International Standard Book Number, or ISBN for short. The ISBN consists of 10 digits divided into 4 parts. For example, the ISBN 0 941831 39 6 represents the following information: The first part: The first digit "0" signifies the book is from an English-speaking country. The second part: "941831" identifies the publisher. The third part: "39" is the title number for the book. The fourth part: "6" is a check digit to indicate that the sum of the ISBN digits is 10. The class should have a constructor and methods to set and get the ISBN as a string. Design a Book class that represents relevant information about a book, including the book's title, author, publisher, city and date of publication, and price. The class should also include the field ISBN isbnNum; where ISBN is the class defined above. This class should include a constructor and the following methods:
- setBookISBN: to set the ISBN for the book.
- getAuthor: to return the author of the book.
- getBookISBN: to get the ISBN of the book.
- printDetails: to print the information of a book in the following form:
Book Title: Object First with Java
Book Author: David j. Barnes and Michael Kolling
Publisher: Prentice Hall
ISBN: 0 941831 39 6
q4 : graduation.java
/**
* The Student class represents a student in a student administration system.
* It holds the student details.
*/
public class Student
{ private String name; // the student's full name
private String id; // the student ID
private int credits; // the amount of credits for study taken so far
// Create a new student with a given name and ID number.
public Student (String fullName, String studentID)
{ name = fullName;
id = studentID;
credits = 0;
}
// Return the full name of this student.
………….
// Set a new name for this student.
………….
// Return the student ID of this student.
………….
// Add some credit points to the student's accumulated credits.
………….
/* Check the number of credit points this student has accumulated.
* If it is less than 132, then print “Not yet grdauated”, otherwise print “Graduated”.
*/
………….
// Print the student's name and ID number to the output terminal.
…………..