Answer Posted / lavanya
methods that r not in use now though they were defined
initially . this is done in order to provide a secure and
robust language
Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
What does snprintf return?
What is your platform?s default character encoding and how to know this?
How are the elements of a gridbaglayout organized in java programming?
What is volatile data type?
What is meant by binding in rmi?
Lowest Common ancestor in a Binary Search Tree and Binary Tree.
What is internal iteration in java se 8?
What is the lifetime and scope of a variable?
Can an interface have a class?
How can we create a synchronized collection from given collection?
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)
What is nested interface?
Who developed java?
How will you communicate between two applets?
How do you create a null object?