Method Overloading - Java baisics

Method Overloading is a feature that allows a class to have more than one method having the same name, if their argument lists are different. It is similar to constructor overloading in Java, that allows a class to have more than one constructor having different argument lists.

The same method name but different number of parameters.

public class Main {

    public static void main(String[] args) {
        // no return value
        calculateScore("Pawel",100);
        //we use returned variable score and put to the new variable
        int newScore = calculateScore("John",100);
        System.out.println("New score is "+ newScore);

        //results of method overloading
        calculateScore(100);

        // result of method overloading

        calculateScore();

        // data type of return variable does not overload method
    }
    public static int calculateScore (String playerName, int score){
        System.out.println("Player " + playerName +" scored "+score + " points");
        return score*1000;
    }
    // method overloading
    public static int calculateScore (int score){
        System.out.println("Unnamed Player scored "+score + " points");
        return score*1000;
    }
    // method overloading
    public static int calculateScore (){
        System.out.println("Unnamed Player no player score");
        return 0;
    }
}

• Example 1: Overloading – Different Number of parameters in argument list
• Example 2: Overloading – Difference in data type of parameters
• Example 3: Overloading – Sequence of data type of arguments