Methods, like variables, are given unique names. Trying to create a second identical method as another method in your class would cause an error. However, if the parameters are different, a method name can be reused. This process is called Method Overloading.

Valid/Invalid Overloading

Only certain changes to a method declaration allow a method to be overloaded. Consider the following four cases:

Case 1: The number of parameters is different(valid)

public static int myMethod(int x, int y)  
{ 
}

public static int myMethod(int x)  
{ 
}

Case 2: The data type of parameters is different(valid)

public static int myMethod(int x)  
{ 
} 

public static int myMethod(double x)  
{ 
}

Case 3: The variable letter is different(Invalid)

public static int myMethod(int x) 
{ 
}

public static int myMethod(int y) 
{ 
}

Case 4: The return type is different(Invalid)

public static int myMethod(int x) 
{ 
} 

public static void myMethod(int x)  
{ 
}