Method: It is a set of statements that collectively perform a specific task and can be invoked any number of times by using its name. In other words, these lines of code are grouped together to form a method and this defined method can be used any number of time. It reduces the length of the code and improves readability.
Polymorphism: It refers to ability to take multiple forms. In Java, method overloading and overriding are the ways to implement polymorphism.
Method Overloading
Overloading is a feature that allows a class to have multiple methods having same name. In order to achieve this, one can change number of method arguments or argument datatypes.
Syntax:
class A {
void show () {
// body
}
// overloading
void show (int x) {
// body
}
...
}
Method Overriding
Overriding is a feature that allows a subclass to have a method that is already defined in parent class, with same name and signature, but different implementation.
Syntax:
class A {
void show () {
// body
}
}
class B extends A {
// overriding
@override
void show () {
// body
}
...
}
Difference between method overloading and overriding in Java in tabular form
[wpsm_comparison_table id=”22″ class=”center-table-align”]
Java Overriding Example:
public class PUBG {
void demageAWM (){
System.out.println("1 shot damage 100 % ");
}
}
class PUBGUpdatedVersion extends PUBG {
// overriding demageAWM()
@Override
void demageAWM() {
System.out.println("1 shot damage 95%");
}
}
class test {
public static void main(String[] args) {
PUBGUpdatedVersion gun = new PUBGUpdatedVersion();
gun.demageAWM();
}
}Output:
1 shot damage 95%
Java Overloading Example
public class PUBG {
// overloading attachments()
void attachments (String scope){
System.out.println("This is pistal with "+scope);
}
void attachments (String scope, String mag,String extender){
System.out.println("This is Auto Gun with "+scope+","+mag+", "+extender);
}
}
class test {
public static void main(String[] args) {
PUBG gun = new PUBG();
gun.attachments("Red dot");
gun.attachments("6x","AWM mag","AWM extender");
}
}Output:
This is pistal with Red dot This is Auto Gun with 6x,AWM mag, AWM extender
