Java identifiers and variable class, JAVA Programming

1. Which of the following are not valid Java identifiers, and why?

(a) wolVes

(b) United(there is only one)

(c) 87

(d) 5 3

(e) Real ale

(f) isFound?by

2. A class Television has the following fields:

private TelevisionManufacturer supplier;

private String code

private int screenSize; // in inches

private String type; // e.g. plasma screen

Assume that the class TelevisionManufacturer is available and that this class contains an equals method.

(a) Define a class variable, totalTVs, whose purpose is to keep track of the total number of Television objects constructed during execution of a program that uses the Television class.

(b) Declare a default constructor for this class.

(c) Declare a constructor for this class which has a formal parameter corresponding to each field.

(d) Declare an accessor method called getScreenSize whose purpose is to return the value of the screenSize field of this Television.

(e) Declare a mutator method that sets the type of this Television to a given value.

(f) Declare a method to determine whether or not this Television has been supplied by a given manufacturer.

Lab work

1. An electronics company needs to implement a simple stock control system. You are required to write a Java application which contains a class called StockItem together with a main method class called StockDemo. Information for each type of stock item consists of:

1.  inventory identifier (e.g. A654Y);

2.  quantity in stock (e.g. 350);

3.  demand rate (quantity removed from stock each working day, assumed constant, e.g. 50);

4.  re-order quantity (the size of an ordered batch of items, assumed constant, e.g 1000);

5.  lead-time (number of working days delay between placing and receiving an order for a batch, e.g. 5).

The class StockItem should include fields for each of the above data items and should also include each of the following:

1.  a default constructor that sets all fields to null or zero as appropriate;

2.  a constructor with arguments for all fields;

3.  set methods for all fields;

4.  accessor methods for each of the fields;

5.  a method to update the stock quantity when a batch is received;

Posted Date: 3/9/2013 5:48:23 AM | Location : United States







Related Discussions:- Java identifiers and variable class, Assignment Help, Ask Question on Java identifiers and variable class, Get Answer, Expert's Help, Java identifiers and variable class Discussions

Write discussion on Java identifiers and variable class
Your posts are moderated
Related Questions
Object Oriented Programming   Java is basically object oriented. Each line of code you write in java should be inside a class (not counting import directives). OOP fundamental

What are Access Specifiers available in Java? Java has four access specifiers, which are enlisted below: Public: public methods, classes and fields can be accessed by ever

For your project, you will be designing a payroll system for a company. The company will use the system to generate payroll reports based on different kinds of employees in the com


Both Java and C++ use same syntax and are Object Oriented, but there are several differences between Java and C++:   1.    Java does not use pointers. Pointers are inherently

write a java program to board coloring

A socket is one end-point of a two-way communication link among two programs running on the network. A socket is bound to a port number so that the TCP layer can recognize the appl

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

Illustrate an example of static variables System. out .println("some text"); -- out is a static variable JOptionPane. showMessageDialog (null, "some text"); -- showMessageDi

We need a serious programmer who will code Java and Javascript in Liferay - open to bidding Project Description: Big Data project Prototype in Liferay. Big Data + User onl