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What is default specifier ??? Use of default specifier ???
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Answer / hemanta paudel
Java provide a default access specifier which is apply when
programmer does not use other specifier.
The default specifier allow to access only with in the same
package. If class A and class B are in same package
(Mypackage) then class A can access class B and vice-verse.
class A
{
-----------
----------
---------
}
class B
{
A a=new A();
--------
--------
}
| Is This Answer Correct ? | 12 Yes | 2 No |
Answer / david sandyp
default is the access given to the class when no access specifier is mentioned ..
Default is not public but it is almost like public.
| Is This Answer Correct ? | 5 Yes | 3 No |
Answer / prativa mohapatra
Java provides a default specifier which is used when no
access modifier is present. Any class, field, method or
constructor that has no declared access modifier is
accessible only by classes in the same package. The default
modifier is not used for fields and methods within an
interface.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / malli
default specifier:
with out mention any access specifier (private,
public,protect) is called default specifier.
ex://default// class Manager
{
}
use:
we can assign any default access specifier to particular
classes those classes we can use with in same package.
| Is This Answer Correct ? | 0 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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