Liskov Substitution Principle

LiskovSubstitutionPrinciple.java

public class somebody {
    public static void main(String[] argv) {
        Store store = new Store();
        List<Cellphone> cellphones = store.getCellphones();
        for (int i = 0; i < cellphones; i++) {
            cellphones[i].power(false);
        }

        iPhone iphoneX = new iPhone();
        cellphones.add(iphoneX);
    }

    public void callMom(Cellphone cellphone) {
        cellphone.call(mom)
    }
}


// Cellphone 
public interface Cellphone {
    void call(People people);
    void textMessage(String text);
    void power(boolean powerOn);
}

public abstract class Cellphone {}

// Entity
public class Nokia3310 implement Cellphone {
    
    public void strong() { /* WOWOWOWOWOW */ }

    @Override
    public void call(People people) { /*do something */ }
    @Override
    public void textMessage(String text) { /* do something */ }
    @Override
    public void power(boolean powerOn) { /* do something */ }
}

public class iPhone implement Cellphone {

    public void surfingInternet() { /* I's so cool!!!! */ }
    public void installApp() { /* I's so cool!!!!! Again */ }

    @Override
    public void call(People people) { /*do something */ }
    @Override
    public void textMessage(String text) { /* do something */ }
    @Override
    public void power(boolean powerOn) { /* do something */ }
}