Answer / pranab dutta

If a class defines a method using the same name, return
type, and arguments in its super class, then it is called
Overriding. Methods are overridden to make them more
public. The method in the class overrides the method in the
super class.
When the method is invoked for an object of the class, it
is the new definition of the method that is called, and not
the method definition from super class.

Answer / gopalramana

To define method in subclass having same method name as
method in superclass having same return type,same
parameters,then method in subclass should be override
method in superclass.

used in code repalcement.

Answer / siddu

overriding is nothing to change behaviour of super class
method in subclass with same singature of method

Answer / ashish sharma

overriding comes with two class ( base and drived class )

function in the base class is like

public virtual void Display();

function in the drived class is like

public override void Display();

this function overrides the base class .

Answer / vikneswarank

the class and it sub contain one method with same name and
same signature and same return type also
sub class in method will override in super class.

in case of overridding during run time jvm knows which
method it will call.

Answer / sajith

If class define method using same name,parameter,return
type,argument in its superclass then it is called overriding.
sub class should be override parentclass

Answer / arvind wagh

Overriding means same name methods in different classes

When the method is invoked for an object
of the class, it is the new definition of the method that is
called, and not the method definition from super class

Is java still relevant?

0 Answers  

why are wait(), notify() and notifyall() methods defined in the object class? : Java thread

0 Answers  

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)

0 Answers  

What is java virtual machine? Explain

0 Answers  

How to validate the request (Eg:user name and password) in session(http session)? not in LDAP server ?

1 Answers   Saksoft,

What is arraylist class in java?

0 Answers  

What is the driver class?

0 Answers  

Difference between string, string builder, and string buffer?

0 Answers  

Considering notepad/ie or any other thing as process, what will happen if you start notepad or ie 3 times? Where 3 processes are started or 3 threads are started?

0 Answers  

What is the file type?

0 Answers  

what are the boundaries of jdk and jre?

0 Answers   CoreObjects,

Is there any difference between synchronized methods and synchronized statements?

0 Answers