What is overloading explain with an example, JAVA Programming

Assignment Help:

What is Overloading explain with an example?

Overloading is while the similar method or operator can be used on several different kinds of data. For example the + sign is used to add ints as well as concatenate strings. The plus sign behaves differently depending on the kinds of its arguments. Thus the plus sign is inherently overloaded.

Methods can be overloaded as well. System.out.println() can print a double, a float, an int, a long, or a String. You don't do anything various depending on the type of number you need the value of. Overloading takes care of it.

Programmer-defined classes can overload methods as well. To do this easily write two methods with the similar name but different argument lists. For instance last week you saw several different versions of the Car constructor, one that took three arguments and one that took two arguments, and one in which took no arguments. You can use all of these in a single class, by here I only use two because there really aren't any high-quality default values for licensePlate and maxSpeed. Instead, 0 is a perfectly reasonable default value for speed.

public class Car {

private String licensePlate; // e.g. "New York A456 324"
private double speed; // kilometers per hour
private double maxSpeed; // kilometers per hour

// constructors
public Car(String licensePlate, double maxSpeed) {

this.licensePlate = licensePlate;
this.speed = 0.0;
if (maxSpeed >= 0.0) {
this.maxSpeed = maxSpeed;
}
else {
maxSpeed = 0.0;
}

}

public Car(String licensePlate, double speed, double maxSpeed) {

this.licensePlate = licensePlate;
if (maxSpeed >= 0.0) {
this.maxSpeed = maxSpeed;
}
else {
maxSpeed = 0.0;
}

if (speed < 0.0) {
speed = 0.0;
}

if (speed <= maxSpeed) {
this.speed = speed;
}
else {
this.speed = maxSpeed;
}

}

// other methods...

}
Generally a single identifier refers to precisely one method or constructor. While as above, one identifier refers to more than one techniques or constructor, the method is said to be overloaded. You could argue that this should be known as identifier overloading rather than method overloading since it's the identifier that refers to more than one method, not the method in which refers to more than one identifier. Therefore in common usage this is known as method overloading.

Which method an identifier describes to depends on the signature. The signature is the number, type, and order of the arguments passed to a method. The signature of the first constructor in the above program is Car(String, double). The signature of the second techniques is Car(String, double, double). Thus the first version of the Car() constructor is called when there is one String argument followed through one double argument and the second version is used while there is one String argument followed through two double arguments.

If there are no arguments to the constructor, or two or three arguments in which aren't the right type in the right order, then the compiler produces an error because it doesn't have a techniques whose signature matches the requested method call. For instance
Error: Method Car(double) not found in class Car.


Related Discussions:- What is overloading explain with an example

Client for nokia symbian platform, Project Description: I need Team spea...

Project Description: I need Team speak 3 client for Nokia Symbian platform. Project for Nokia E72, but should work on all Java/Symbian mobiles. Feature list should include

Describe the benefits of threads, Question 1: a) What is an "Operating...

Question 1: a) What is an "Operating System"? b) Describe the four main computer system components. c) Describe and compare "Parallel Systems" and "Distributed Systems

Explain switch statement in java language, Explain switch statement in java...

Explain switch statement in java language? Switch statements are shorthands for a certain type of if statement. It is not common to see a stack of if statements all related

What is an intelligent system, What is an intelligent system? Intellige...

What is an intelligent system? Intelligent system is a SW programs or SW and HW systems designed to perform complex tasks employing strategies in which mimic some aspect of hum

Object oriented programming language, what are the steps of object oriented...

what are the steps of object oriented programming language?

Explain pop, SMTP (Simple Mail Transfer Protocol) permits two mail servers ...

SMTP (Simple Mail Transfer Protocol) permits two mail servers to communicate using a easy language, and gives a step-by-step protocol for exchanging information. SMTP delivers m

Develop a adobe air native extension, Develop a Adobe Air Native Extension ...

Develop a Adobe Air Native Extension Project Description: We are seeking someone that must create an adobe native extension for the subsequent SDK: Develop a Adobe Air Nat

Android apk for 3g dongles support, ANDROID APK for 3G dongles support P...

ANDROID APK for 3G dongles support Project Description: We want someone who will modify this Android app or code a similar one. The App function is to let Android tablet P

Vigenere Cipher decryption unknown key, I need help writing this code eithe...

I need help writing this code either in java or in python. basically the steps are described here in this youtube video or">https://www.youtube.com/watch?v=LaWp_Kq0cKs or this is

Program to calculates the number of unique shapes, 1. Write the code for th...

1. Write the code for the method that calculates the number of unique shapes for a binary search tree with n nodes. Use the formula  where b n is the number of possible sh

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd