Answer Posted / ajay kumar sharma

Web-based applications:
Those are developed for web services or register on Web
like a website.These apps run on public domain.

Client- Server applications: A application that is
developed to run on a Local network like LAN or just
working on a local domain.

Both can be pronounced as Distributive Applications.

What is a static class in java?

1014

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Name four container classes.

994

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What are the files generated after using IDL to java compiler?

1151

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Is a method a function?

1068

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Who is founder of java?

999

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What an i/o filter?

1021

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The following program reads data (details of students) from a file named students.txt and converts it into e-mail addresses. The results are written to a file named studentemail.txt. students.txt consists of a number of lines, each containing the data of a student in colon delimited format: Last Name:First Name:Student Number Each input record is converted to an e-mail address and written to studentemail.txt in the following format: the first character of the last name + the first character of the first name + the last four digits of the student number + “@myunisa.ac.za” import java.io.*; public class EmailConverter { public static void main(String[] args) throws IOException { BufferedReader input = new BufferedReader(new FileReader ("students.txt")); PrintWriter output = new PrintWriter(new FileWriter ("studentemail.txt")); String line = input.readLine(); while (line != null) { // Extract the information for each student String[] items = line.split(":"); // Generate the email address String email = "" + items[0].charAt(0) + items[1].charAt(0) + items[2].substring(4,8) + "@myunisa.ac.za"; email = email.toLowerCase(); // Output output.println(email); line = input.readLine(); } input.close(); output.close(); } } Rewrite the class so that it handles possible errors that may occur. In particular, it should do the following: • It should catch at least three appropriate exceptions that might occur, and display suitable messages. • At this stage, the program will not run correctly if there is an empty line in the input file. Change the program so that if an empty line is encountered, an exception is thrown and the empty line is ignored. This exception should be handled with the display of a suitable error message. • Before the e-mail address is added to the output file, check if the student number has 8 digits. If not, throw an InvalidFormatException (which the program should not handle itself)

1947

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Differentiate between stringbuffer and string?

1033

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How does list work in java?

921

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can I implement my own start() method? : Java thread

994

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What are parameters in a method?

1110

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What are the advantages of passing this into a method instead of the current class object itself?

1675

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What is general methodology?

1041

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Explain the public class modifier?

958

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Can we assign integer value to char in java?

1034

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