Overloading

Definition

Overloading Overloading a function is to use the same function name, but give it different parameters.

Lecture Code

Note in the lecture code below how funct1() has different parameters passed to it. It first has String data passed to it, then double data, followed by int data, and then both String and int data. Same function name with different data types.

Overloading a function is used mostly in creating JAVA constructors when building classes.

public class Overload_demo {


    //func1 with no parameters
    static void func1() {
        System.out.println("This is function 1 with no arguments");
        return;
    }
    //func1 with a string parameter
    static void func1(String mydata) {
        System.out.println("This is function 1 with a string");
        return;
    }
    //func1 with a double parameter
    static void func1(double mydata) {
        System.out.println("This is function 1 with a double");
        return;
    }
    //func1 with an int parameter
    static void func1(int mydata) {
        System.out.println("This is function 1 with a double");
        return;
    }
    //func1 with a string and int parameter
    //note that this one also returns a string
    //where the other one did not.
    static String func1(String mystring, int mydata) {
        String Ans = "";
        Ans = ("This is function 1 with a string and an int");
        return Ans;
    }
    //add2 - add two doubles
    static double add2(double num1, double num2)
    {
        return (num1 + num2);
    }
    //add2 - concatenate two strings
    static String add2(String text1,String text2)
    {
        return (text1 + " " + text2 + " - is great!");
    }
            
    public static void main(String[] args) {
        //func1 examples
        func1();
        func1("Bubba");
        func1(22.5);
        func1(999);
        System.out.println(func1("Bob", 59));

        //add2 examples
        System.out.println(add2(100.00,6000.00)); 
        System.out.println(add2("hot","dog"));
         
    }
}

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End Of Topic