An Introduction To Network Programming With Java 3rd Edition Jan Graba - Solutions

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Using a text editor or word processor, create a text file holding a series of surnames and payroll numbers (at least five of each). For example:Now write a Java program that uses a while loop to read values from the above text file and displays then in a table under the headings ‘Surname’ and
Modify the above code to use the alternative method for multithreading (i.e., implementing the Runnable interface). Name your main class RunnableHelloBye and your subsidiary classes Hello and Goodbye respectively. The first should display the message ‘Hello!’ ten times (with a random delay of
Take a copy of the above program, rename the class and modify the appropriate line so that the program accepts input from the standard input stream (i.e., using a Scanner around the standard input stream, System.in). Then use redirection to feed the values from your payroll text file into your
Write a (very short) program that creates a serial text file holding just two or three names of your own choosing. After compiling and running the program, use the MS-DOS command type (or the equivalent command for your platform) to display the file’s contents. For example:type names.txt
Making use of class Results shown below, repeat the above program, this time writing/reading objects of class Result. (When displaying the names and marks that have been read, of course, you must make use of the methods of class Result.) Once again, redirect initial input to come from your text
(i) Write a program to display the stock code, unit price and current level for all items in table Stock. (ii) Modify the above code to display description, current level and reorder level for all items whose current level is at or below reorder level.
Take a backup of your database. Then create a program (using SQL strings) that will insert one record, increase by 10 % the unit price of each item of stock and delete one record with specified stock code. The program should display stock codes and prices of all items both before and after the
Write a simple GUI-driven program that will allow the user to retrieve the current stock level of any item whose stock code he/she enters (repeatedly, for as many items as the user wishes).
(i) Modify the above Web page and servlet so that the POST method is used to send both the user’s name and his/her email address. The Web page returned should display the user’s email address below the original message. (ii) Once the servlet has been compiled without error, execute the command
Extend the above application to cater for selection of bananas, as well as apples and pears.
Compile ImageServer.java and ImageClient.java from the first example in this chapter. Make sure that file beesting.jpg is accessible to the server and then run this application.Example:This example creates (a) a server process that transmits a fixed graphics file to any client that makes contact
Modify MediaClient.java so that it creates an ImageIcon from the byte array received from the server and then uses a JLabel to display the image received. Compile the source code for the two program files (MediaClient.java and MediaServer.java) and then run the application.
Modify the code for SimpleSound.java so that the user can specify the number of ‘cuckoos’ when ‘play’ is pressed. (For separate chimes, you will need to insert an empty delay loop with a very large upper count value.)
(i) Compile and run the MediaPlayer program from the end of the chapter, experimenting with the video and sound files supplied on the CD-ROM. (ii) Modify the above program so that the user can repeatedly specify further sound and/or video files (without necessarily waiting for the previous file to
Create an applet with a single button that holds an image. (Use the JButton constructor that takes an ImageIcon as its single argument.) Whenever the button/image is pressed a single ‘cuckoo’ should sound.
Specifying an area of size 300 pixels × 300 pixels in your HTML file, create an applet that holds an image that is positioned and scaled so that it occupies an area 40 pixels in from each side of the applet window. In order that the applet window can be distinguished from the Web page, change the
Create an applet that displays a simple drawing of a house.
This exercise converts the above files into a simple email server and email client respectively. The server conversion has been done for you and is contained in file EmailServer.java, a printed version of which appears on the following pages for ease of reference. Some of the code for the client
If you haven’t already done so, compile programs TCPEchoServer and TCPEchoClient from Sect. 2.2.1 and then run them as described at the end of that section.Sect. 2.2.1A communication link created via TCP/IP sockets is a connection orientated link. This means that the connection between server and

An Introduction To Network Programming With Java 3rd Edition Jan Graba - Solutions

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