Hands-On Automation Testing with Java for Beginners by Rahul Shetty

Author:Rahul Shetty
Language: eng
Format: epub
Tags: COM051280 - COMPUTERS / Programming Languages / Java, COM051000 - COMPUTERS / Programming / General, COM051330 - COMPUTERS / Software Development and Engineering / Quality Assurance and Testing
Publisher: Packt Publishing
Published: 2018-09-28T11:23:45+00:00

Function overloading

Function overloading happens when a class has multiple methods with the same name. If we define a getData method twice in our class, we can say that the getData function is overloaded, as shown in the following code:

package coreJava;

//function overloading

public class childlevel extends childClassDemo {

public void getData(int a)

{

}

public void getData(String a)

{

}

public static void main(String[] args) {

childlevel cl=new childlevel();

cl.getData(2);

cl.getData("hello")

}

}

There are a few rules that we need to remember while using multiple instances of a function with the same name. The first rule is that the number of arguments present in the function-overloaded method should be different, and the second is that the argument data type should be different. If we keep both the getData methods with the int a argument, it will throw an error, so we need to have a different number of arguments for each method. Now, when you print these, you'll get the outputs of 2 and hello. We can see that two different arguments are printed, but with the same method name. Let's add one more getData instance with two arguments, as follows:

public void getData(int a, int b)

{

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