Method Overload

Method overloading in programming refers to the ability to define multiple methods with the same name but different parameter lists within a class. This allows developers to provide different implementations for the same operation depending on the types or number of arguments passed to the method. Method overloading enhances code readability and maintainability by allowing developers to use a single method name for related functionalities, making the code more intuitive and self-explanatory. A common use case for method overloading is in constructors, where multiple constructors can be defined to initialize objects with different sets of parameters, providing flexibility and convenience for object instantiation. Additionally, method overloading is useful for providing default parameter values or handling variations in input data types, allowing for more versatile and adaptable code.

Select Languages

Examples

C

// No Native Support or Implementation

C#

class UserForm {
  public string formA = "alpha";
  public string formB = "beta";
  public string formC = "gamma";
  public string formD = "epsilon";
  
  public string getForm(int age) {
    if (age > 65) {
      return formA;
    }
    return formB;
  }

  public string getForm(string id) {
    if (id == "1FE") {
        return formA;
    }
    return formC;
  }
  
  public string getForm(
    bool isMilitary,
    bool isNasa
  ) {
    if (isMilitary || isNasa) {
      return formD;
    }
    return formA;
  }
}

UserForm form = new UserForm();
      
int myAge = 67;
string myId = "1FE";
bool veteran = false;
bool nasa = true;

string form1 = form.getForm(myAge);
string form2 = form.getForm(myId);
string form3 = form.getForm(veteran, nasa);

Console.WriteLine(form1 + "\n");
Console.WriteLine(form2 + "\n");
Console.WriteLine(form3 + "\n");

C++

#include <iostream>
using namespace std;

class UserForm {
  public:
    string formA = "alpha";
    string formB = "beta";
    string formC = "gamma";
    string formD = "epsilon";
    
    string getForm(int age) {
      if (age > 65) {
        return formA;
      }
      return formB ;
    }

    string getForm(string formId) {
        if (formId == "gamma") {
            return formD;
        }
        return formA;
    }

    string getForm(
      bool isMilitary,
      bool isNasa
    ) {
      if (isMilitary || isNasa) {
        return formD;
      }
      return formA;
    }
};

UserForm form;
int myAge = 67;
string myId = "1FE";
bool veteran = false;
bool nasa = true;

string form1 = form.getForm(myAge);
string form2 = form.getForm(myId);
string form3 = form.getForm(veteran, nasa);
    
cout << form1 << endl;
cout << form2 << endl;
cout << form3 << endl;

Go

// No Native Support or Implementation

Java

class UserForm {
  public String formA = "alpha";
  public String formB = "beta";
  public String formC = "gamma";
  public String formD = "epsilon";
  
  public String getForm(int age) {
    if (age > 65) {
      return formA;
    }
    return formB;
  }
  
  public String getForm(String id) {
    if (id == "1FE") {
        return formA;
    }
    return formC;
  }
  
  public String getForm(
    boolean isMilitary,
    boolean isNasa
  ) {
    if (isMilitary || isNasa) {
      return formD;
    }
    return formA;
  }
}

UserForm form = new UserForm();
int myAge = 67;
String myId = "1FE";
boolean veteran = false;
boolean nasa = true;

String form1 = form.getForm(myAge);
String form2 = form.getForm(myId);
String form3 = form.getForm(veteran, nasa);

System.out.println(form1 );
System.out.println(form2 );
System.out.println(form3 );

JavaScript

// No Native Support or Implementation

Kotlin

class UserForm {
  val formA:String = "alpha";
  val formB:String = "beta";
  val formC:String = "gamma";
  val formD:String = "epsilon";
  
  fun getForm(age:Int):String {
    if (age > 65) {
      return formA;
    }
    return formB;
  }
  
  fun getForm(id:String):String {
    if (id == "1FE") {
        return formA;
    }
    return formC;
  }
  
  fun getForm(
    isMilitary:Boolean,
    isNasa:Boolean
  ):String {
    if (isMilitary || isNasa) {
      return formD;
    }
    return formA;
  }
}

val form =UserForm();
val myAge = 67;
val myId = "1FE";
val veteran = false;
val nasa = true;

val form1 = form.getForm(myAge);
val form2 = form.getForm(myId);
val form3 = form.getForm(veteran, nasa);

println(form1 );
println(form2 );
println(form3 );

MatLab

// No Native Support or Implementation

PHP

// No Native Support or Implementation

Python

// No Native Support or Implementation

R

// No Native Support or Implementation

Ruby

// No Native Support or Implementation

Rust

// No Native Support or Implementation

Scala

class UserForm {
  val formA:String = "alpha";
  val formB:String = "beta";
  val formC:String = "gamma";
  val formD:String = "epsilon";
  var selectForm:String = "";
  
  def getForm(age:Int) {
    if (age > 65) {
      selectForm = formA;
    }
    selectForm = formB;
  }
  
  def getForm(id:String) {
    if (id == "1FE") {
        selectForm = formA;
    }
    selectForm = formC;
  }
  
  def getForm(
    isMilitary:Boolean,
    isNasa:Boolean
  ) {
    if (isMilitary || isNasa) {
      selectForm = formD;
    }
    selectForm = formA;
  }
}

val form = new UserForm();
val myAge = 67;
val myId = "1FE";
val veteran = false;
val nasa = true;

form.getForm(myAge);
val form1 = form.selectForm;

form.getForm(myId);
val form2 = form.selectForm;

form.getForm(veteran, nasa);
val form3 = form.selectForm;

println(form1);
println(form2);
println(form3);

Swift

class UserForm {
  var formA:String = "alpha";
  var formB:String = "beta";
  var formC:String = "gamma";
  var formD:String = "epsilon";
  
  func getForm(age: Int) -> String {
    if (age > 65) {
      return formA;
    }
    return formB;
  }
  
  func getForm(id: String) -> String {
    if (id == "1FE") {
        return formA;
    }
    return formC;
  }
  
  func getForm(
    isMilitary: Bool,
    isNasa: Bool
  ) -> String {
    if (isMilitary || isNasa) {
      return formD;
    }
    return formA;
  }
}

var form = UserForm();
var myAge = 67;
var myId = "1FE";
var veteran = false;
var nasa = true;

var form1 =
  form.getForm(age: myAge);
var form2 =
  form.getForm(id: myId);
var form3 =
  form.getForm(
    isMilitary: veteran,
    isNasa: nasa
  );
  
print(form1);
print(form2);
print(form3);

TypeScript

// No Native Support or Implementation

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