How to inverting a function in sort and searching?

935

Describe the working of 1φ fully controlled bridge converter in the rectifying mode and inversion mode. And derive the expressions for average output voltage and rms output voltage?

1248

What is RPA UiPath?

252

What is the difference in the way microstrategy handles custom group and consolidations?

958

What are best features of Apache Avro?

52

all interview questions regarding digital image processing

12876

What is service host factory in wcf?

798

Is artificial intelligence ethical?

905

What is the use of WSDL.exe utility?

709

What is oracle database client?

994

What is com, com+ and dcom ?

1007

What is meant by analogous system?

1249

How can an individual use spreadsheets?

601

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)

1914

Explain the difference between optical zoom, digital zoom and smart zoom?

924