Polymorphism is one of the most important OOPs concepts. Its is a concept by which we can perform single task in multiple ways. There are two types of polymorphism one is Compile-time polymorphism and another is run-time polymorphism.
Method overloading is the example of compile time polymorphism and method overriding is the example of run-time polymorphism.
| Sr. No. | Key | Compile-time polymorphism | Runtime polymorphism |
|---|---|---|---|
| 1 | Basic | Compile time polymorphism means binding is occuring at compile time | R un time polymorphism where at run time we came to know which method is going to invoke |
| 2 | Static/Dynamic Binding | It can be achieved through static binding | It can be achieved through dynamic binding |
| 4. | Inheritance | Inheritance is not involved | Inheritance is involved |
| 5 | Example | Method overloading is an example of compile time polymorphism | Method overriding is an example of runtime polymorphism |
Example of Compile-time Polymorphism
public class Main {
public static void main(String args[]) {
CompileTimePloymorphismExample obj = new CompileTimePloymorphismExample();
obj.display();
obj.display("Polymorphism");
}
}
class CompileTimePloymorphismExample {
void display() {
System.out.println("In Display without parameter");
}
void display(String value) {
System.out.println("In Display with parameter" + value);
}
}Example of Runtime Polymorphism
public class Main {
public static void main(String args[]) {
RunTimePolymorphismParentClassExample obj = new RunTimePolymorphismSubClassExample();
obj.display();
}
}
class RunTimePolymorphismParentClassExample {
public void display() {
System.out.println("Overridden Method");
}
}
public class RunTimePolymorphismSubClassExample extends RunTimePolymorphismParentExample {
public void display() {
System.out.println("Overriding Method");
}
}