By GokiSoft.com| 15:31 21/09/2022|

Java Basic

Java Basic- OOP - Interface - Quản lý động vật java - đề tiếng anh

Question1:

Create an interface named as IAnimal with the below method:

void input(): input data from keyboard

void display(): display information

Question2:

Create a class named as Animal which implements the IAnimal interface, and have attributes:

private String name;

private double weight;

+ Create two constructors, in which

- Default constructor

- Constructor with arguments used to assign value for Animal’s attributes.

+ Create get/set methods

+ Implement all methods from IAnimal to input data and display information of Animal

Question3:

Create a class named as Cat which extends from Animal and have an extra attribute:

private String color;

+ Create two constructors, in which

- Default constructor

- Constructor with arguments used to assign value for Cat’s attributes and attributes extended from Animal.

+ Create get/set methods

+ Override all methods from Animal to input data and display information of Cat

Question3:

Create a class named as Chicken which extends from Animal and have some extra attribute:

private int numberOfLeg;

+ Create two constructors, in which

- Default constructor

- Constructor with arguments used to assign value for Chicken’s attributes and attributes extended from Animal.

+ Create get/set methods

+ Override all methods from Animal to input data and display information of Chicken

Question4:

Create the test class named as AnimalTest to do the following action:

1) Create an array for classes: Animal, Cat and Chicken with length 3.

2) Create only one menthod inputDataForAnimal(): used to input data for array of Animal, Cat and Chicken

3) Create only one menthod displayDataOfAnimal(): used to display information of all items in array of Animal, Cat and Chicken.

4) Create main() method to test the above methods

Phản hồi từ học viên

5

(Dựa trên đánh giá ngày hôm nay)

Nguyễn Tiến Đạt

2021-02-28 17:38:13

#Animal.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lesson7.QuanLyDongVat;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;

/**
 *
 * @author MyPC
 */
public class Animal implements IAnimal{
    private String name;
    private double weight;
    ArrayList<Animal> list = new ArrayList<>();
    
    Animal animal;
    int select, countAnimal = 0, countCat = 0 , countChicken = 0;
    public void inputDataForAnimal(){
        selectAnimal();
        animal.input();
        list.add(select,animal);
    }
    String a;
    public void displayDataOfAnimal(){
        int checkAnimal = countAnimal, checkCat = countCat, checkChicken = countChicken;
        for (Animal x : list) {
            if(checkAnimal == countAnimal){
                System.out.println("List of Animal:");
            }
            else if(checkAnimal == 0 && checkCat == countCat){
                System.out.println("List of Cat:");
            }
            else if(checkCat == 0 && checkChicken == countChicken){
                System.out.println("List of Chicken:");
                checkChicken--;
            }
            x.display();
            if( checkAnimal > 0 ){
                checkAnimal--;
                continue;
            }
            if(checkCat > 0 && checkAnimal == 0 ){
                checkCat--;
                continue;
            }
            if(checkChicken > 0 && checkCat == 0){
                checkChicken--;
                continue;
            }
        }
    }
    
    public void selectAnimal(){
        Scanner scan = new Scanner(System.in);
        System.out.println("1.Animal");
        System.out.println("2.Cat");
        System.out.println("3.Chicken");
        System.out.println("Select animal:");
        int choose = Integer.parseInt(scan.nextLine());
        if(choose == 1 ){
            select = 0;
            animal = new Animal();
            countAnimal++;
        }
        else if(choose == 2 ){
            select = 1;
            animal = new Cat();
            countCat++;
        }
        else if(choose == 3 ){
            select = 2;
            animal = new Chicken();
            countChicken++;
        }
    }

    public Animal() {
    }

    public Animal(String name, double weight) {
        this.name = name;
        this.weight = weight;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getWeight() {
        return weight;
    }

    public void setWeight(double weight) {
        this.weight = weight;
    }
    
    

    @Override
    public void input() {
        Scanner scan = new Scanner(System.in);
        System.out.println("Name:");
        name = scan.nextLine();
        System.out.println("Weight:");
        weight = Double.parseDouble(scan.nextLine());
    }

    @Override
    public void display() {
        System.out.println("Name: " + name);
        System.out.println("Weight: " + weight);
    }

    
    
    
}

#AnimalTest.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lesson7.QuanLyDongVat;

import java.util.ArrayList;
import java.util.Scanner;

/**
 *
 * @author MyPC
 */
public class AnimalTest {
    public static void main(String[] args) {
        Animal animal = new Animal();
        Scanner scan = new Scanner(System.in);
        int choose;
        do{
            showMenu();
            System.out.println("Select program:");
            choose = Integer.parseInt(scan.nextLine());
            switch(choose){
                case 1:
                    animal.inputDataForAnimal();
                    break;
                case 2:
                    animal.displayDataOfAnimal();
                    break;
                default:
                    System.err.println("Wrong command!!");
                    break;
            }
        }while( choose != 2 );
    }
    
    static void showMenu(){
        System.out.println("1. Input data for Animal");
        System.out.println("2. Display data of Animal");
    }
}

#Cat.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lesson7.QuanLyDongVat;

import java.util.Scanner;

/**
 *
 * @author MyPC
 */
public class Cat extends Animal{
    private String color;

    public Cat() {
    }

    public Cat(String color) {
        this.color = color;
    }

    public Cat(String color, String name, double weight) {
        super(name, weight);
        this.color = color;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    @Override
    public void input() {
        Scanner scan = new Scanner(System.in);
        super.input();
        System.out.println("Color:");
        color = scan.nextLine();
    }

    @Override
    public void display() {
        super.display(); //To change body of generated methods, choose Tools | Templates.
        System.out.println("Color: " + color);
    }
    
    
    
}

#Chicken.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lesson7.QuanLyDongVat;

import java.util.Scanner;

/**
 *
 * @author MyPC
 */
public class Chicken extends Animal{
    private int numberOfLeg;

    public Chicken() {
    }

    public Chicken(int numberOfLeg) {
        this.numberOfLeg = numberOfLeg;
    }

    public Chicken(int numberOfLeg, String name, double weight) {
        super(name, weight);
        this.numberOfLeg = numberOfLeg;
    }

    public int getNumberOfLeg() {
        return numberOfLeg;
    }

    public void setNumberOfLeg(int numberOfLeg) {
        this.numberOfLeg = numberOfLeg;
    }

    @Override
    public void input() {
        Scanner scan = new Scanner(System.in);
        super.input(); //To change body of generated methods, choose Tools | Templates.
        System.out.println("Number of legs:");
        numberOfLeg = Integer.parseInt(scan.nextLine());
    }

    @Override
    public void display() {
        super.display(); //To change body of generated methods, choose Tools | Templates.
        System.out.println("Number of legs: " + numberOfLeg);
    }
    
    
}

#IAnimal.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lesson7.QuanLyDongVat;

/**
 *
 * @author MyPC
 */
public interface IAnimal {
    void input();
    void display();
}

Đỗ Văn Huấn

2020-03-17 12:30:50

package BaiTapNgay6_3_2020.Bai58;

public interface IAnimal {
    void input();
    void output();
}

package BaiTapNgay6_3_2020.Bai58;

import java.util.Scanner;

public class Cat extends Animal {
    private String color;

    public Cat() {
    }

    public Cat(String name, double weigth, String color) {
        super(name, weigth);
        this.color = color;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    @Override
    public void input() {
        System.out.println("Nhap thong tin meo:");
        super.input();
        Scanner can = new Scanner(System.in);
        System.out.println("Nhap color: ");
        color = can.nextLine();
        System.out.println("");
    }

    @Override
    public void output() {
        super.output();
        System.out.println(toString());
    }

    @Override
    public String toString() {
        return "Cat{" +
                "color='" + color + '\'' +
                '}';
    }
}

package BaiTapNgay6_3_2020.Bai58;

import java.util.Scanner;

public class Chicken extends Animal {
    private int numberOfLeg;

    public Chicken() {
    }

    public Chicken(String name, double weigth, int numberOfLeg) {
        super(name, weigth);
        this.numberOfLeg = numberOfLeg;
    }

    public int getNumberOfLeg() {
        return numberOfLeg;
    }

    public void setNumberOfLeg(int numberOfLeg) {
        this.numberOfLeg = numberOfLeg;
    }
    @Override
    public void input() {
        System.out.println("thong tin ga:");
        super.input();
        Scanner can = new Scanner(System.in);
        System.out.println("Nhap numberOfLeg: ");
        numberOfLeg = Integer.parseInt(can.nextLine());
        System.out.println("");
    }

    @Override
    public void output() {
        super.output();
        System.out.println(toString());
    }

    @Override
    public String toString() {
        return "Chicken{" +
                "numberOfLeg=" + numberOfLeg +
                '}';
    }
}

package BaiTapNgay6_3_2020.Bai58;

import java.util.Scanner;

public class Animal implements IAnimal {
   private String name;
   private double weigth;

    public Animal() {
    }

    public Animal(String name, double weigth) {
        this.name = name;
        this.weigth = weigth;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getWeigth() {
        return weigth;
    }

    public void setWeigth(double weigth) {
        this.weigth = weigth;
    }

    @Override
    public void input() {

        Scanner can = new Scanner(System.in);
        System.out.println("nhap name:" );
        name = can.nextLine();
        System.out.println("Nhap weidth: ");
        weigth = Double.parseDouble(can.nextLine());
        System.out.println("");
    }

    @Override
    public void output() {
        System.out.println(toString());
    }

    @Override
    public String toString() {
        return "Animal{" +
                "name='" + name + '\'' +
                ", weigth=" + weigth +
                '}';
    }
}

package BaiTapNgay6_3_2020.Bai58;

public class AnimalTest {

    public static void main(String[] args) {
        inputDataForAnimal();
        displayDataForAnimal();
    }

    private static void inputDataForAnimal() {
        Animal[] animals = new Animal[3];
        animals[0] = new Animal();
        animals[0].input();

        animals[1] = new Chicken();
        animals[1].input();

        animals[2] = new Cat();
        animals[2].input();
    }

    private static void displayDataForAnimal() {
        Animal[] animals = new Animal[3];
        animals[0].output();
        animals[1].output();
        animals[2].output();

    }


}

Java Basic- OOP - Interface - Quản lý động vật java - đề tiếng anh

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Phản hồi từ học viên

5

Nguyễn Tiến Đạt

#Animal.java

#AnimalTest.java

#Cat.java

#Chicken.java

#IAnimal.java

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