Method overloading in java is based on the number and type of the parameters passed as an argument to the methods. We can not define more than one method with the same name, Order, and type of the arguments. It would be a compiler error. The compiler does not consider the return type while differentiating the overloaded method. But you cannot declare two methods with the same signature and different return types. It will throw a compile-time error. If both methods have the same parameter types, but different return types, then it is not possible. Show
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Java can distinguish the methods with different method signatures. i.e. the methods can have the same name but with different parameters list (i.e. the number of the parameters, the order of the parameters, and data types of the parameters) within the same class. Parameters should be different means
Javaimport java.io.*; void add(int, int); void add(double,double); class Adder{ void add(int a, int b){ System.out.println(“sum =”+(a+b)); } void add(double a, double b){ System.out.println(“sum=”+(a+b)); } public static void main(String[] args){ Adder ad=new Adder(); ad.add(5,6); ad.add(5.4,7.2); }} 2. Number of parameter should be different
Javaclass Adder{ void add(int a, int b){ System.out.println(“sum =”+(a+b)); } void add(int a, int b,int c){ System.out.println(“sum=”+(a+b+c)); } public static void main(String[] args){ Adder ad=new Adder(); ad.add(5,6); ad.add(5.4,7.2); }} Geeks, now you would be up to why do we need method overloading? If we need to do some kind of operation in different ways i.e. for different inputs. In the example described below, we are doing the addition operation for different inputs. It is hard to find many meaningful names for a single action. Ways of Overloading MethodsMethod overloading can be done by changing:
Let us propose examples in order to illustrate each way while overloading methods. They are as follows: Method 1: By changing the number of parameters. Javaimport java.io.*; class Addition { public int add(int a, int b) { int sum = a + b; return sum; } 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 :6Method 2: By changing the Data types of the parameters Javaimport java.io.*; class Addition { public int add(int a, int b, int c) { int sum = a + b + c; return sum; } 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 :6.0Method 3: By changing the Order of the parameters Javaimport 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("Id :" + id + " " + "geekName :" + name); } } class GFG { public static void main(String[] args) { Geek geek = new Geek(); geek.geekIdentity("Mohit", 1); geek.geekIdentity(2, "shubham"); } } Output geekName :Mohit Id :1 geekName :shubham Id :2
Example 4 Javaimport java.io.*; class Addition { public int add(int a, int b) { int sum = a + b; return sum; } public double add(int a, int b) { double sum = a + b + 0.0; return sum; } } class GFG { public static void main(String[] args) { try { 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); System.out.println( "sum of the three integer value :" + sum2); } catch (Exception e) { System.out.println(e); } } } Output: Related Articles:
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article is contributed by Nitsdheerendra. If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to . See your article appearing on the GeeksforGeeks main page and help other Geeks. What is the process of defining two or more methods within same class that have same name but different parameters declaration a method overloading?In Java, two or more methods may have the same name if they differ in parameters (different number of parameters, different types of parameters, or both). These methods are called overloaded methods and this feature is called method overloading. What is the process of defining more than one method in a class differentiated by method?If a class has multiple methods having same name but parameters of the method should be different is known as Method Overloading. Is process that can create multiple methods of the same name in the same class?Having two or more methods named the same in the same class is called overloading. Which method has the same name as that of its class?A constructor is a method that initializes an object immediately upon creation. It has the same name as that of class in which it resides. What is the process of defining two or more methods?The practice of defining two or more methods within the same class that share the same name but have different parameters is called overloading methods.
What is a signature in java?The method signature in java is defined as the structure of the method that is designed by the programmer. The method signature is the combination of the method name and the parameter list. The method signature depicts the behavior of the method i.e types of values of the method, return type of the method, etc.
What is method signature in java Mcq?What is method signature in java ? – Method signature in java includes only method name and parameters. Method return types are not included in method signature. For example, in below class method declaration only “foo(String str)” is the method signature that contains method name and parameters.
What is the process of defining a method in a subclass?If subclass (child class) has the same method as declared in the parent class, it is known as method overriding in Java. In other words, If a subclass provides the specific implementation of the method that has been declared by one of its parent class, it is known as method overriding.
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