Method Overloading in Java | Java Programming Tutorial | Core Java Certification Training | Uplatz

Method overloading is a feature in Java that allows a class to have multiple methods with the same name but different parameter lists. It provides a convenient way to define methods that perform similar operations but with different input parameters. The compiler determines which method to call based on the number or type of arguments provided during the method invocation.

To overload a method in Java, the methods must have:

1. The same name
2. Different parameter lists (number or type of parameters)
The return type of the method is not considered when overloading, meaning that two methods with the same name and parameter list but different return types cannot coexist.

Here's an example to illustrate method overloading:
public class MathOperations {
// Method to add two integers
public int add(int a, int b) {
return a + b;
}

// Method to add three integers
public int add(int a, int b, int c) {
return a + b + c;
}

// Method to add two double values
public double add(double a, double b) {
return a + b;
}

// Method to concatenate two strings
public String add(String str1, String str2) {
return str1 + str2;
}
}

public class Main {
public static void main(String[] args) {
MathOperations math = new MathOperations();

}
}

In this example, the MathOperations class contains four overloaded add methods. The first two methods perform addition for integer data types, while the third method performs addition for double data types. The fourth method concatenates two strings.

During the method invocation, Java determines the appropriate method to call based on the number and type of arguments passed. For example:

Method overloading enhances code readability and provides flexibility when working with different types of data or different numbers of arguments for similar operations.

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