Question

What is method overloading and method overriding in Java?

Answer 1

Method overloading: When a method in a class having the same method name with different arguments is said to be method overloading.

Method overriding : When a method in a class having the same method name with same arguments is said to be method overriding.

Answer 2

Method overloading in Java occurs when two or more methods in the same class have the exact same name, but different parameters.

class Dog{

    public void bark(){

        System.out.println("woof ");

    }

<span class="token cComment">//overloading method</span>

<span class="token cVar">public</span> <span class="token cVar">void</span> <span class="token cMod">bark</span><span class="token cBase">(</span><span class="token cVar">int</span> num<span class="token cBase">)</span><span class="token cBase">{</span>

<span class="token cVar">for</span><span class="token cBase">(</span><span class="token cVar">int</span> i<span class="token cBase">=</span><span class="token cNum">0</span><span class="token cBase">;</span> i<span class="token cBase">&lt;</span>num<span class="token cBase">;</span> i<span class="token cBase">++</span><span class="token cBase">)</span>

<span class="token class-name">System</span><span class="token cBase">.</span>out<span class="token cBase">.</span><span class="token cMod">println</span><span class="token cBase">(</span><span class="token cString">"woof "</span><span class="token cBase">)</span><span class="token cBase">;</span>

<span class="token cBase">}</span>

}

On the other hand, method overriding is defined as the case when a child class redefines the same method as a parent class. Overridden methods must have the same name, argument list, and return type. The overriding method may not limit the access of the method it overrides.

class Dog{

public void bark(){

System.out.println("woof ");

}

}

class Hound extends Dog{

public void sniff(){

System.out.println("sniff ");

}

<span class="token cVar">public</span> <span class="token cVar">void</span> <span class="token cMod">bark</span><span class="token cBase">(</span><span class="token cBase">)</span><span class="token cBase">{</span>

    <span class="token class-name">System</span><span class="token cBase">.</span>out<span class="token cBase">.</span><span class="token cMod">println</span><span class="token cBase">(</span><span class="token cString">"bowl"</span><span class="token cBase">)</span><span class="token cBase">;</span>

<span class="token cBase">}</span>

}

public class OverridingTest{

public static void main(String [] args){

Dog dog = new Hound();

dog.bark();

}

}

Source: github.com/snowdream