Page 186 - CTS - CSA TP - Volume 2

COMPUTER SOFTWARE APPLICATION - CITS

public void performTask() {
System.out.println(“Performing a task...”);

}
// Implementation of Flyable interface method
@Override
public void fly() {
System.out.println(“Flying...”);

}
// Implementation of Swimmable interface method
@Override
public void swim() {

System.out.println(“Swimming...”);
}
// Main method
public static void main(String[] args) {
InterfaceExample example = new InterfaceExample();
// Calling methods from implemented interfaces

example.print();
System.out.println(“Area: “ + example.calculateArea());
example.greet();
example.farewell(); // Calling default method

example.performTask();
example.fly();
example.swim();
}
}

Explanation:
1 Basic Interface (Printable):
• Declares a single abstract method print().
2 Interface with Constant (Shape):

• Declares a constant PI and an abstract method calculateArea().
3 Interface with Default Method (Greeting):
• Declares an abstract method greet() and a default method farewell() with an implementation.
4 Interface with Static Method (Utility):
• Declares an abstract method performTask() and a static method showInfo() with an implementation.
5 Interface Inheritance (Flyable and Swimmable):

• Two interfaces with different methods.
• A third interface (FlyingSwimmingCreature) inherits from both Flyable and Swimmable.
6. Main Class (InterfaceExample):

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CITS : IT & ITES - Computer Software Application - Exercise 111 CITS : IT & ITES - Computer Software Application - Exercise 111