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Re: Overloading Methods

on Mon Aug 20, 2018 3:21 pm
Overloading a Method Example C#

class ch03_12
{
static void Main()
{
System.Console.WriteLine("Here's the area of the square: {0}",
Math2.Area(10));
System.Console.WriteLine("Here's the area of the rectangle: {0}",
Math2.Area(10, 5));
}
}

public class Math2
{
// This one's for squares
public static double Area(double side)
{
return side * side;
}

// This one's for rectangles
public static double Area(double length, double height)
{
return length * height;
}
}

output.

C:\>ch03_12
Here's the area of the square: 100
Here's the area of the rectangle: 50
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Re: Overloading Methods

on Mon Aug 20, 2018 3:26 pm
Some Python does not supports method overloading. We may overload the methods but can only use the latest defined method.
In Python you can define a method in such a way that there are multiple ways to call it. Given a single method or function, we can specify the number of parameters ourself. Depending on the function definition, it can be called with zero, one, two or more parameters.
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Re: Overloading Methods

on Mon Aug 20, 2018 3:28 pm
ex.Python

# First product method.
# Takes two argument and print their
# product
def product(a, b):
p = a * b
print(p)

# Second product method
# Takes three argument and print their
# product
def product(a, b, c):
p = a * b*c
print(p)

# Uncommenting the below line shows an error
# product(4, 5)

# This line will call the second product method
product(4, 5, 5)

output
100

n the above code we have defined two product method, but we can only use the second product method, as python does not supports method overloading. We may define many method of same name and different argument but we can only use the latest defined method. Calling the other method will produce an error. Like here calling product(4, 5) will produce an error as the latest defined product method takes three arguments.
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Re: Overloading Methods

on Mon Aug 20, 2018 3:34 pm
Overloading in PHP provides means to dynamically "create" properties and methods. These dynamic entities are processed via magic methods one can establish in a class for various action types.In other terms creating properties/methods at run-time is called property overloading/method overloading.
The overloading methods are invoked when interacting with properties or methods that have not been declared or are not visible in the current scope. The rest of this section will use the terms "inaccessible properties" and "inaccessible methods" to refer to this combination of declaration and visibility.

All overloading methods must be defined as public.
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Re: Overloading Methods

on Mon Aug 20, 2018 3:37 pm
In php, property overloading can be done by magic methods like __set, __unset, __isset, __get method overloading can be done by magic methods like __call and __call_static PHP's interpretation of "overloading" is different than most object oriented languages. Overloading traditionally provides the ability to have multiple methods with the same name but different quantities and types of arguments.
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Re: Overloading Methods

on Mon Aug 20, 2018 3:56 pm
Three ways to overload a method
1. Number of parameters.
2. Data type of parameters.
3. Sequence of Data type of parameters.
SHARE KO LANG.
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Re: Overloading Methods

on Mon Aug 20, 2018 4:05 pm
Hyegi wrote:Can overloaded methods be synchronized?

Multithreading: Since java is multithreaded language, synchronization is a good way to achieve mutual exclusion on shared resource(s). Instance and Static Methods: Both synchronized instance methods and synchronized static methods can be executed concurrently because they are used to lock different Objects.
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Re: Overloading Methods

on Mon Aug 20, 2018 4:44 pm
Why Method Overloading is not possible by changing the return type of method only?
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Re: Overloading Methods

on Mon Aug 20, 2018 4:47 pm
Can we overload methods on return type?
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Re: Overloading Methods

on Mon Aug 20, 2018 4:47 pm
Does Java support Operator Overloading?
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Re: Overloading Methods

on Mon Aug 20, 2018 4:48 pm
What is the advantage of Overloading Methods?
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Re: Overloading Methods

on Mon Aug 20, 2018 4:49 pm
what is the difference between Method Overloading: changing no. of arguments and Method Overloading: changing data type of arguments?

can you site some examples? thankyou
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Re: Overloading Methods

on Mon Aug 20, 2018 4:50 pm
Why method overloading?
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Re: Overloading Methods

on Wed Aug 22, 2018 2:35 pm
athenakenji wrote:Why Method Overloading is not possible by changing the return type of method only?

Actually return type is not a part of method signature, so changing return type only, is not sufficient, which method should be picked since all other things are same in both the methods.
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Re: Overloading Methods

on Wed Aug 22, 2018 2:37 pm
athenakenji wrote:Why method overloading?

we perform method overloading to figure out the program quickly.
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Re: Overloading Methods

on Wed Aug 22, 2018 2:55 pm
athenakenji wrote:what is the difference between Method Overloading: changing no. of arguments and Method Overloading: changing data type of arguments?

can you site some examples? thankyou

Overloading by changing number of arguments

class MethodOverloading {
private static void display(int a){
System.out.println("Arguments: " + a);
}

private static void display(int a, int b){
System.out.println("Arguments: " + a + " and " + b);
}


public static void main(String[] args) {
display(1);
display(1, 4);
}
}

output.
Arguments: 1
Arguments: 1 and 4

Method Overloading: changing data type of arguments
class Adder{
static int add(int a, int b){return a+b;}
static double add(double a, double b){return a+b;}
}
class TestOverloading2{
public static void main(String[] args){
System.out.println(Adder.add(11,11));
System.out.println(Adder.add(12.3,12.6));
}}
Output:

22
24.9
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Re: Overloading Methods

on Wed Aug 22, 2018 2:57 pm
athenakenji wrote:What is the advantage of Overloading Methods?

Advantages of method overloading in java

1.Overloading in Java is the ability to create multiple methods of the same name, but with different parameters.
2.The main advantage of this is cleanliness of code.
3.Method overloading increases the readability of the program.
4.Overloaded methods give programmers the flexibility to call a similar method for different types of data.
5.Overloading is also used on constructors to create new objects given different amounts of data.
6.You must define a return type for each overloaded method. Methods can have different return types
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Re: Overloading Methods

on Wed Aug 22, 2018 3:00 pm
athenakenji wrote:Does Java support Operator Overloading?

Java doesn't support "user defined Operator overloading". The only aspect of Java which comes close to "custom" operator overloading is the handling of + for strings, which either results in compile-time concatenation of constants or execution-time concatenation using StringBuilder/StringBuffer.
Java only allows arithmetic operations on elementary numeric types. It's a mixed blessing, because although it's convenient to define operators on other types (like complex numbers, vectors etc), there are always implementation-dependent idiosyncrasies
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Re: Overloading Methods

on Wed Aug 22, 2018 3:03 pm
athenakenji wrote:Can we overload methods on return type?
No, you can't overload by return type; only by parameter types, and const/volatile qualifiers. One alternative would be to "return" using a reference argument: void get(int, int&); void get(int, char&);.
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Re: Overloading Methods

on Wed Aug 22, 2018 3:05 pm
Method overloading properties in Java

In overloading methods are binded During compilation process called static binding, compiler bind method call to actual method.
The overloaded methods are fast because they are bonded during compile time and no check or binding is required during runtime.
Necessary rule of overloading in Java is that two overloaded method must have different signature. The below points brief what does method signature means in Java
1. Return type of method is not part of method signature in Java.
2. Number of argument to a method is part of method signature.
3. Type of argument to a method is also part of method signature
4. Order of argument also forms part of method signature provided they are of different type.
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Re: Overloading Methods

on Wed Aug 22, 2018 3:08 pm
Different ways of Method Overloading in Java
By changing the number of parameters.
import java.io.*;

class Addition{

// adding two integer values.
public int add(int a, int b){

int sum = a+b;
return sum;
}

// adding three integer values.
public int add(int a, int b, int c){

int sum = a+b+c;
return sum;
}

}

class GFG {
public static void main (String[] args) {

Addition ob = new Addition();

int sum1 = ob.add(1,2);
System.out.println("sum of the two integer value :" + sum1);
int sum2 = ob.add(1,2,3);
System.out.println("sum of the three integer value :" + sum2);

}
}

Output:

sum of the two integer value :3
sum of the three integer value :6


By changing the Data types of the parameters
import java.io.*;

class Addition{

// adding three integer values.
public int add(int a, int b, int c){

int sum = a+b+c;
return sum;
}

// adding three double values.
public double add(double a, double b, double c){

double sum = a+b+c;
return sum;
}
}

class GFG {
public static void main (String[] args) {

Addition ob = new Addition();

int sum2 = ob.add(1,2,3);
System.out.println("sum of the three integer value :" + sum2);
double sum3 = ob.add(1.0,2.0,3.0);
System.out.println("sum of the three double value :" + sum3);


}
}

Output:

sum of the three integer value :6
sum of the three double value :6.0


By changing the Order of the parameters
import java.io.*;

class Geek{

public void geekIdentity(String name, int id){

System.out.println("geekName :"+ name +" "+"Id :"+ id);
}

public void geekIdentity(int id, String name){

System.out.println("geekName :"+ name +" "+"Id :"+ id);
}
}

class GFG {
public static void main (String[] args) {

Geek geek = new Geek();

geek.geekIdentity("Mohit", 1);
geek.geekIdentity("shubham", 2);

}
}

Output:

geekName :Mohit Id :1
geekName :shubham Id :2

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Re: Overloading Methods

on Wed Aug 22, 2018 3:29 pm
wheein wrote:
Hyegi wrote:Can we declare overloaded methods as final?

When a method is declared as final, then that method can be overloaded but can't be overridden in the sub classes. Though they are available to use in sub classes through the subclass object as shown below. No, you cannot override final method in Java.
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Re: Overloading Methods

on Wed Aug 22, 2018 4:08 pm
janna wrote:
ekkoekko wrote:What Does Method Signature Mean in Java?

a method signature is part of the method declaration in java. It's the combination of the method name and the parameter list.

Method Signature

public void setMapReference(int xCoordinate, int yCoordinate)
{
//method code
}
The method signature in the above example is setMapReference(int, int). In other words, it's the method name and the parameter list of two integers.

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Re: Overloading Methods

on Wed Aug 22, 2018 4:12 pm
kathrynmoto wrote:
janna wrote:What is the difference between method overloading and method overriding in Java?

Overloading occurs when two or more methods in one class have the same method name but different parameters while Overriding means having two methods with the same method name and parameters

Differences Between Overloading and Overriding
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Re: Overloading Methods

on Wed Aug 22, 2018 4:17 pm
johnarnold wrote:
athenakenji wrote:Why method overloading?

we perform method overloading to figure out the program quickly.

1.Overloading is very useful in Java. In overloading we can overload methods as long as the type or number of parameters (arguments) differ for each of the method. 2.Suppose you need to perform a complex mathematical operation, but sometimes need to do it with two numbers and sometimes three, etc. 3.In overloading a class can have multiple methods with the same name that can be differentiated by the number and type of arguments passed into the method. For example, to simplify your calls, by using the method with the least number of arguments when all defaults are acceptable. Or you can use it when you have more than one way of identifying the same thing, like (String) name and (Long) ID.
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