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
Test Driven Development (TDD) TDD process gives your confidence in the delivered code for the following things. 1. TDD can remove duplication of code and also disciplines t

Why do we need wrapper classes? It is sometimes simpler to deal with primitives as objects. Moreover most of the collection classes keep objects and not primitive data types. A

JDBC Assignment Banking Database System:  BankCustomer CUST_ID  CUST_NAME ADDRESS ACC_TYPE CUST_ID

how can i implement Mid-Square hashing?

Computer application and program. Project Description: I require a project done. It is a computer desktop application program. It is not very hard. Skills required: Any

Polymorphism - defines the ability of a single variable of a provided type to be used to reference objects of different types, and automatically call the method that is specific

When MalformedURLException and UnknownHostException throws? Ans) When the particular URL is not connected then the URL throws MalformedURLException and If InetAddress? methods g

How do I write a program a bout Rotor cipher?