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what Data encapsulation in java?
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Answer / satyanarayana
Encapsulation means binding the data and code into a single
entity.
| Is This Answer Correct ? | 20 Yes | 2 No |
Answer / ddd
grouping of data in a class.such methods varibles etc
| Is This Answer Correct ? | 10 Yes | 3 No |
Answer / swapna kumari arava
Wrapping up of the data members and member functions into a
classs is nothing but encapsulation.
| Is This Answer Correct ? | 7 Yes | 2 No |
Answer / sanjay
designing comprises of code and data.Data is enclosed with
memory wheras code is enclosed with functions.
Thus Data encapsulation is encapsulating the Data to Code
to perform certain functions.
Also Data encapsultion is required for hiding the actual
functios of the objects
| Is This Answer Correct ? | 4 Yes | 3 No |
Answer / sudheer nath
data encapsulation means the data member and the member function can remains inside the class ,only those member function which is the part of the class can only access thw data member of a class .tise is used for security purpuse .
| Is This Answer Correct ? | 1 Yes | 0 No |
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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)
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