Abstraction is the basis for good Object-Oriented design that is modular, reusable, and maintainable.

Interfaces and Abstract classes are two mechanisms in Java that provide high-level abstractions. An interface or abstract class is something which is not concrete, something which is incomplete.

For this discussion, what do you think is meant by “Programming to an interface”? What are some differences between Abstract Classes and Interfaces? Provide a simple example application with an interface definition and a class which implements the interface.

please, solve this problem.:

implementing with java language

create a bank account management system according to the following specifications:

BankAccount Abstract Class contains the following constructors and methods:

BankAccount(name, balance): a constructor that creates a new account with a name and starting balance.

getBalance(): a method that returns the balance of a specific account.

abstract deposit(amount): abstract method to be implemented in both Checking and SavingAccount classes.

abstract withdraw(amount): abstract method to be implemented in both Checking and SavingAccount classes.

messageTo Client (message): used to print a specific message to a client.

toString(): a method for printing accounts information.

CheckingAccount Class: A class that inherits from the Abstract Class BankAccount and implements both deposit () and withdraw ().

Deposit process in checking account has some constrains. Client can deposit any amount using checks and limit of $10,000.00 of cash deposit.

Client can withdraw any amount he wants.

SavingAccount Class: A class that inherits from the Abstract Class BankAccount and implements both deposit () and withdraw ().

A client can deposit any amount using checks and a limit of $5,000.00 of cash deposit. A 5% interest should be calculated on the total.

Client can only withdraw 20% of the total balance every 3 months.

Use interfaces for both checkingAccount and savingAccount classes.

BankAccountDriver class: this class is to test your code. The test should be done by creating an array of type BankAccount that stores different bank accounts types for different clients and perform some processing by calling the implemented methods on these accounts.

Java - Write an abstract class called Shape with a string data field called colour. Write a getter and setter for colour. Write a constructor that takes colour as the only argument. Write an abstract method called getArea()

This violates Liskov Substitution Principle (LSP), can someone explain why and refactor it so it does not?

  
public abstract class Bird
    {
        public abstract void LayEgg();
        public abstract void FlyAway();
    }
    public class Penguin : Bird
    {
        public override void LayEgg()
        {
            //Make husband penguin do all the incubation work.
        }
        public override void FlyAway()
        {
            //Penguins can't fly.
            throw new NotImplementedException();
        }

        public void SwimAway()
        {
            //Swimming is way more fun.
        }
    }

What can parents do to increase a child’s social cognitive skills and foster moral maturity? Your answers need to be specific and reflect the capabilities of the child's stage of development. (For example, you cannot expect a 6 year old to be able to construct hypothetical and abstract thought.)

1. What are some of the factors that a researcher should consider in developing the recommendations for a research study?
2. What is the difference between a recommendation and a conclusion in a research study?
3. What is the difference between an abstract and an introduction in a research study?
4. What is the role of an abstract in a research study?

Create a short program in Java which contains the below information:

- Has one abstract and two regular classes

- Has two interfaces (the two regular classes have to implement at least one interface

- At least one regular class must implement both interfaces

- The two classes have to extend the abstract class

- The abstract class must have a method

- At least one interface must have a method

- At least two fields in each class, this includes the superclass

- All the fields are instantiated within the constructor

Select one of the choices below:

A mental model of the behavior of a function or algorithm is called a(n):

A: Abstract data type

B: Abstract data type implementation

C: Data abstraction

D: Encapsulation

E: Function Declaration

F: None of the above

DO THIS PROGRAM IN JAVA Write a complete Java console based program following these steps: 1. Write an abstract Java class called Shape which has only one abstract method named getArea(); 2. Write a Java class called Rectangle which extends Shape and has two data membersnamed width and height.The Rectangle should have all get/set methods, the toString method, and implement the abstract method getArea()it gets from class Shape. 3. Write the driver code tat tests the classes and methods you write above.