Kuidas saab tõestada, et abstraktse klassi meetodid on kohustuslikud üle kirjutada?

In Android (Java/Kotlin), an abstract class can contain abstract methods, which are methods without implementation that must be overridden in subclasses. If a subclass does not implement these methods, the code will not compile.

Example in Java:

abstract class Animal {
    // Abstract method, mandatory to override
    abstract void makeSound();
}

class Dog extends Animal {
    @Override
    void makeSound() {
        System.out.println("Woof-woof");
    }
}

// If you try to create a class without implementing makeSound(), there will be a compilation error

Thus, the presence of an abstract method forces all subclasses to implement it, ensuring polymorphism and adherence to SOLID principles.