By GokiSoft.com| 18:35 10/05/2024|

Java Basic

Java basic- Overview - Viết chương trình quản lý xe car bằng java

1. Create an interface Icar that has the following methods:

● Method “calculateTax()”, returns the type float: calculate the tax of the car.

● Method “calculatePrice()”, returns the type float: calculate the total cost of the car.

● Method “getInfor()”, returns the type void: display the information of the car.

2. Create a class Car inherit from interface Icar. [6]

Declare fields has access modifier as private use for properties: name, producer, year, seat and rootprice.

● Create two constructors and all method get/set for its attributes

● Implement method calculateTax() to calculate the Tax as follows:

○ If the car has under 7 seats then tax = RootPrice * 60%.

○ Else tax = RootPrice * 70%

● Implement method calculatePrice() to calculate TotalPrice as follows:

○ TotalPrice=RootPrice + Tax

● Implement method getInfor() to show the information as follows: .... car produced by ... in ... has ... seats with the total price is ....$. Variable includes :name of the car, the name of the manufacturer, year of production, seats and TotalPrice (For example: Ford car produced by Ford in 1997 has 4 seats with the total price is 20000 $).

Declaring class LuxuryCar inherits from class Car and adding follow attrubtes :

private float specialRate;

● Create two constructors and all method get/set for its attributes

● Override method calculatePrice to calculate TotalPrice as follows : TotalPrice = RootPrice + Tax + RootPrice * specialRate

● Overload method calculatePrice with 1 parameter named “transportCost” with type float. It calculates TotalCost as follows: TotalPrice = RootPrice + Tax + RootPrice * specialRate + transportCost.

Create a class named Test.

● Declare and initialize 1 instance named “myLuxuryCar” of class LuxuryCar.

○ Input Name, Producer, Year, Seat, rootPrice from the keyboard (Catch exception when input value). Display the contents of this LuxuryCar.

○ Calculate TotalPrice in case transportCost is $ 20,000, and display it.

Phản hồi từ học viên

5

(Dựa trên đánh giá ngày hôm nay)

GokiSoft.com

2021-07-23 02:00:45

#Main.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 lesson09;

/**
 *
 * @author Diep.Tran
 */
public class Main {
    public static void main(String[] args) {
        LuxuryCar myLuxuryCar = new LuxuryCar();
        myLuxuryCar.input();
        
        myLuxuryCar.getInfor();
        
        float total = myLuxuryCar.calculatePrice(20000);
        System.out.println("\nTotal Price: " + total);
    }
}

#LuxuryCar.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 lesson09;

import java.util.Scanner;

/**
 *
 * @author Diep.Tran
 */
public class LuxuryCar extends Car{
    float specialRate;

    public LuxuryCar() {
    }

    public LuxuryCar(float specialRate, String name, String producer, String year, int seat, float rootPrice) {
        super(name, producer, year, seat, rootPrice);
        this.specialRate = specialRate;
    }

    @Override
    public float calculatePrice() {
        return getRootPrice() + calculateTax() + getRootPrice() * specialRate;
    }
    
    public float calculatePrice(float transportCost) {
        return calculatePrice() + transportCost;
    }

    @Override
    public void input() {
        super.input(); //To change body of generated methods, choose Tools | Templates.
        Scanner scan = new Scanner(System.in);
        
        try {
            System.out.println("Special Rate: ");
            specialRate = Float.parseFloat(scan.nextLine());
        } catch(NumberFormatException e) {
        }
    }
}

#ICar.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 lesson09;

/**
 *
 * @author Diep.Tran
 */
public interface ICar {
    float calculateTax();
    float calculatePrice();
    void getInfor();
}

#Car.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 lesson09;

import java.util.Scanner;

/**
 *
 * @author Diep.Tran
 */
public class Car implements ICar{
    String name, producer, year;
    float rootPrice;
    int seat;

    public Car() {
    }

    public Car(String name, String producer, String year, int seat, float rootPrice) {
        this.name = name;
        this.producer = producer;
        this.year = year;
        this.seat = seat;
        this.rootPrice = rootPrice;
    }
    
    @Override
    public float calculateTax() {
        if(seat <= 7) {
            return rootPrice * 0.6f;
        }
        return rootPrice * 0.7f;
    }

    @Override
    public float calculatePrice() {
        return rootPrice + calculateTax();
    }

    @Override
    public void getInfor() {
        System.out.printf("\n%s car produced by %s in %s "
                + "has %d seats with the total price is %f$", 
                name, producer, year, seat, calculatePrice());
    }

    public String getName() {
        return name;
    }

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

    public String getProducer() {
        return producer;
    }

    public void setProducer(String producer) {
        this.producer = producer;
    }

    public String getYear() {
        return year;
    }

    public void setYear(String year) {
        this.year = year;
    }

    public int getSeat() {
        return seat;
    }

    public void setSeat(int seat) {
        this.seat = seat;
    }

    public float getRootPrice() {
        return rootPrice;
    }

    public void setRootPrice(float rootPrice) {
        this.rootPrice = rootPrice;
    }
    
    public void input() {
        Scanner scan = new Scanner(System.in);
        
        System.out.println("Name: ");
        name = scan.nextLine();
        
        System.out.println("Producer: ");
        producer = scan.nextLine();
        
        System.out.println("Year: ");
        year = scan.nextLine();
        
        try {
            System.out.println("Root Price: ");
            rootPrice = Float.parseFloat(scan.nextLine());
        } catch(NumberFormatException e) {
        }
        
        try {
            System.out.println("Seat: ");
            seat = Integer.parseInt(scan.nextLine());
        } catch(NumberFormatException e) {
        }
    }
}

Hoàng Quang Huy

2020-03-31 14:04:06



package Lesson_30_3_2020;

public interface ICar {
	public float calculateTax();
    public float calculatePrice();
    public void getInfor();
}
-------------------------------------------------------------------------------------
package Lesson_30_3_2020;

import java.util.Scanner;

public class Car implements ICar {
	private String name;
	private String producer;
	private int year;
	private int seat;
	private float rootprice;

	public Car() {
		super();
	}

	public Car(String name, String producer, int year, int seat, float rootprice) {
		super();
		this.name = name;
		this.producer = producer;
		this.year = year;
		this.seat = seat;
		this.rootprice = rootprice;
	}

	public String getName() {
		return name;
	}

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

	public String getProducer() {
		return producer;
	}

	public void setProducer(String producer) {
		this.producer = producer;
	}

	public int getYear() {
		return year;
	}

	public void setYear(int year) {
		this.year = year;
	}

	public int getSeat() {
		return seat;
	}

	public void setSeat(int seat) {
		this.seat = seat;
	}

	public float getRootprice() {
		return rootprice;
	}

	public void setRootprice(float rootprice) {
		this.rootprice = rootprice;
	}

	@Override
	public float calculateTax() {
		if (this.seat < 7 && this.seat > 0) {
			return (float) (this.rootprice * 0.6);
		} else {
			return (float) (this.rootprice * 0.7);
		}
	}

	@Override
	public float calculatePrice() {
		float totalprice = this.rootprice + calculateTax();
		return totalprice;
	}

	@Override
	public void getInfor() {
		System.out.println(this.name + " car produced by " + this.producer + " in " + this.year + " has " + this.seat
				+ " seats with the total price is " + this.calculatePrice() + "$");

	}

	public void setInfor() {
		Scanner input = new Scanner(System.in);
		System.out.println("Car Name: ");
		this.name = input.nextLine();
		System.out.println("Producer Name: ");
		this.producer = input.nextLine();
		while(true) {
			try {
				System.out.println("Year produced: ");
				this.year = Integer.parseInt(input.nextLine());
				break;
			}catch(NumberFormatException e) {
				System.out.println("Invalid Year");
			}
		}
		while(true) {
			try {
				System.out.println("Number of seats: ");
				this.seat = Integer.parseInt(input.nextLine());
				break;
			}catch(NumberFormatException e) {
				System.out.println("Invalid number of seats");
			}
		}
		while(true) {
			try {
				System.out.println("Root Price: ");
				this.rootprice = Float.parseFloat(input.nextLine());
				break;
			}catch(NumberFormatException e) {
				System.out.println("Invalid Root Price");
			}
		}
	}
}
------------------------------------------------------------------------------------
package Lesson_30_3_2020;

import java.util.Scanner;

public class LuxuryCar extends Car{
	private float specialRate;

	public LuxuryCar(float specialRate) {
		super();
		this.specialRate = specialRate;
	}

	public LuxuryCar() {
		super();
	}
	
	public float getSpecialRate() {
		return specialRate;
	}

	public void setSpecialRate(float specialRate) {
		this.specialRate = specialRate;
	}
	
	@Override
	public float calculatePrice() {
		float totalPrice = super.getRootprice() + super.calculateTax() + super.getRootprice() * this.specialRate;
		return totalPrice;
		
	}
	
	public float calculatePrice(float transportCost) {
		float totalPrice = super.getRootprice() + super.calculateTax() + super.getRootprice() * this.specialRate + transportCost;
		return totalPrice;
	}
	
	@Override
	public void setInfor() {
		Scanner input = new Scanner(System.in);
		super.setInfor();
		while(true) {
			try {
				System.out.println("Special Rate: ");
				this.specialRate = Float.parseFloat(input.nextLine());
				break;
			}catch(NumberFormatException e) {
				System.out.println("Invalid Special Rate");
			}
			
		}
	}
}
-------------------------------------------------------------------------------------
package Lesson_30_3_2020;

public class Test {
	public static void main(String[] args) {
		LuxuryCar myLuxuryCar = new LuxuryCar();
		myLuxuryCar.setInfor();
		myLuxuryCar.getInfor();
		System.out.println("Total price with transportcost: " + myLuxuryCar.calculatePrice(20000) + "$");
	}
}

Nguyễn Hoàng Anh

2020-03-31 10:03:55

/*
 * 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 CarManager;

/**
 *
 * @author Redmibook 14
 */
interface  Icar {
    public float calculateTax();
    public float calculatePrice();
    public void getInfo();
}

/*
 * 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 CarManager;

/**
 *
 * @author Redmibook 14
 */
public class Car implements Icar {

    private String name, producer;
    
    private int seat,year;
    private float rootprice;

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

    public void setProducer(String producer) {
        this.producer = producer;
    }

    public void setYear(int year) {
        this.year = year;
    }

    public void setSeat(int seat) {
        this.seat = seat;
    }

    public void setRootprice(float rootprice) {
        this.rootprice = rootprice;
    }

    public String getName() {
        return name;
    }

    public String getProducer() {
        return producer;
    }

    public int getYear() {
        return year;
    }

    public int getSeat() {
        return seat;
    }

    public float getRootprice() {
        return rootprice;
    }

    @Override
    public float calculateTax() {
        float tax;
        if (this.seat < 7) {
            tax = (this.rootprice * 60) / 100;
        } else {
            tax = (this.rootprice * 70) / 100;
        }
        return tax;
    }

    @Override
    public float calculatePrice() {
        float TotalPrice = this.rootprice + calculateTax();
        return TotalPrice;
    }

    @Override
    public void getInfo() {
        System.out.println(name + " car produced by " + producer + " in " + year + " has " + seat + " seats with the total price is " + calculatePrice() + "$.");
    }
}

/*
 * 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 CarManager;

/**
 *
 * @author Redmibook 14
 */
public class LuxuryCar extends Car {

    private float specialRate;

    @Override
    public float calculatePrice() {
        float TotalPrice = getRootprice() + calculateTax() + getRootprice()
                * specialRate;
        return TotalPrice;
    }

    public float calculatePrice(float transportCost) {
        float TotalPrice = getRootprice()
                + calculateTax() + getRootprice() * specialRate + transportCost;
        return TotalPrice;

    }

    @Override
    public void getInfo() {
        System.out.println(getName() + " car produced by " + getProducer() + " in " + getYear() + " has " + getSeat() + " seats with the total price is " + calculatePrice() + "$.");
    }

    public void getInfo(float transportCost) {
        System.out.println(getName() + " car produced by " + getProducer() + " in " + getYear() + " has " + getSeat() + " seats with the total price is " + calculatePrice(transportCost) + "$.");
    }
}

/*
 * 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 CarManager;

import java.util.*;

/**
 *
 * @author Redmibook 14
 */
public class Test {

    public static void main(String[] args) {
        LuxuryCar myLuxCar = new LuxuryCar();
        Scanner input = new Scanner(System.in);
        System.out.println("1.Enter name : ");
        String name = input.nextLine();
        myLuxCar.setName(name);
        System.out.println("2.Enter Producer : ");
        String producer = input.nextLine();
        myLuxCar.setProducer(producer);
        System.out.println("3.Enter Year : ");
        while (true) {
            try {
                int year = Integer.parseInt(input.nextLine());
                myLuxCar.setYear(year);
                System.out.println("4.Enter Seat : ");
                int seat = Integer.parseInt(input.nextLine());
                myLuxCar.setSeat(seat);
                System.out.println("5.Enter RootPrice  : ");
                float RootPrice = Float.parseFloat(input.nextLine());
                myLuxCar.setRootprice(RootPrice);
                myLuxCar.getInfo();
                System.out.println("in case transportCost is 20,000$  : ");
                myLuxCar.getInfo(20000);
            } catch (NumberFormatException e) {
                 System.err.println("INVALID INPUT");
            }
        }
    }
}

Ngô Quang Huy

2020-03-30 15:45:22

package March30;

public interface Icar {
    float calculateTax();
    float calculatePrice();
    void getInfor();
}

package March30;


import java.util.Scanner;


public class Car implements Icar{
    public String name,producer;
    public int year,seat;
    public float tax,TotalPrice,rootprice;
    
    public Car() {
    }

    public Car(String name, String producer, int year, int seat, int rootprice) {
        this.name = name;
        this.producer = producer;
        this.year = year;
        this.seat = seat;
        this.rootprice = rootprice;
    }

    public String getName() {
        return name;
    }

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

    public String getProducer() {
        return producer;
    }

    public void setProducer(String producer) {
        this.producer = producer;
    }

    public int getYear() {
        return year;
    }

    public void setYear(int year) {
        this.year = year;
    }

    public int getSeat() {
        return seat;
    }

    public void setSeat(int seat) {
        this.seat = seat;
    }

    public float getRootprice() {
        return rootprice;
    }

    public void setRootprice(int rootprice) {
        this.rootprice = rootprice;
    }

    public float getTax() {
        return tax;
    }

    public void setTax(float tax) {
        this.tax = tax;
    }

    public float getTotalPrice() {
        return TotalPrice;
    }

    public void setTotalPrice(float TotalPrice) {
        this.TotalPrice = TotalPrice;
    }

    @Override
    public float calculateTax() {
        if(seat<7){
            this.tax = this.rootprice*60/100;
        }else{
            this.tax = this.rootprice*70/100;
        }
        return this.tax;
    }

    @Override
    public float calculatePrice() {
        this.TotalPrice = rootprice + tax;
        return this.TotalPrice;
    }

    @Override
    public void getInfor() {
        System.out.println(name+" car produced by "+ producer +" in "
                +year+" has "+seat+" seats with the total price is "
                +TotalPrice+"$");
    }

    void inputCar(){
        Scanner input = new Scanner(System.in);
        System.out.print("Insert Name: ");
        name=input.nextLine();
        System.out.print("Insert Producer: ");
        producer=input.nextLine();
        while(true){
            try{
                System.out.print("Insert Year: ");
                year=Integer.parseInt(input.nextLine());
                break;
            }catch(NumberFormatException e){
                System.err.println("INVALID INPUT");
            }
        }
        while(true){
            try{
                System.out.print("Insert Seat: ");
                seat=Integer.parseInt(input.nextLine());
                break;
            }catch(NumberFormatException e){
                System.err.println("INVALID INPUT");
            }
        }
        while(true){
            try{
                System.out.print("Insert rootPrice : ");
                rootprice=Float.parseFloat(input.nextLine());
                break;
            }catch(NumberFormatException e){
                System.err.println("INVALID INPUT");
            }
        }
    }
}

package March30;

import java.util.Scanner;

public class LuxuryCar extends Car{
    private float specialRate;

    public LuxuryCar(float specialRate) {
        this.specialRate = specialRate;
    }

    public LuxuryCar(float specialRate, String name, String producer, int year, int seat, int rootprice) {
        super(name, producer, year, seat, rootprice);
        this.specialRate = specialRate;
    }

    public LuxuryCar() {
    }

    @Override
    public float calculatePrice() {
        super.TotalPrice = super.rootprice + super.tax + super.rootprice*specialRate;
        return super.TotalPrice;
    }
    
    public float calculatePrice(float transportCost) {
        super.TotalPrice = super.rootprice + super.tax + super.rootprice*this.specialRate + transportCost;
        return super.TotalPrice;
    }

    @Override
    void inputCar() {
        super.inputCar();
        Scanner input = new Scanner(System.in);
        while(true){
            try{
                System.out.print("Insert specialRate: ");
                this.specialRate=Float.parseFloat(input.nextLine());
                break;
            }catch(NumberFormatException e){
                System.err.println("INVALID INPUT");
            }
        }
        
    }
    
    
    
}

package March30;

public class Test {
    public static void main(String[] args) {
        LuxuryCar car = new LuxuryCar();
        car.inputCar();
        car.calculateTax();
        car.calculatePrice(20000);
        System.out.println("\nCar information:");
        car.getInfor();
        System.out.println("\nTotal Price is "+car.TotalPrice);
    }
}

trung

2020-03-30 15:20:22

/*
 * 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 Buoi9;

/**
 *
 * @author prdox
 */
interface Icar {
    //calculate tax of the car
    public float calculateTax();
    //Calculate the total cost of the car
    public float calculatePrice();
    //Display the information of the car
    public void getInfor();
}

/*
 * 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 Buoi9;

import java.util.Scanner;

/**
 *
 * @author prdox
 */
public class Car implements Icar {

    String name, producer;
    int year, seat;
    float rootprice;

    public Car() {
    }

    public Car(String name, String producer, int year, int seat, float rootprice) {
        this.name = name;
        this.producer = producer;
        this.year = year;
        this.seat = seat;
        this.rootprice = rootprice;
    }

    public void inputInfo() {
        Scanner input = new Scanner(System.in);
        System.out.println("Nhap vao ten xe");
        name = input.nextLine();
        System.out.println("Nhap vao hang san xuat");
        producer = input.nextLine();
        while(true) {
            try {
                System.out.println("Nhap vao nam san xuat");
                year = Integer.parseInt(input.nextLine());
                break;
            } catch (NumberFormatException e) {
                System.out.println("Invalid input!");
            }
        }
        while(true) {
            try {
                System.out.println("Nhap vao so ghe");
                seat = Integer.parseInt(input.nextLine());
                break;
            } catch (NumberFormatException e) {
                System.out.println("Invalid input!");
            }
        }
        while(true) {
            try {
                System.out.println("Nhap vao gia goc");
                rootprice = Float.parseFloat(input.nextLine());
                break;
            } catch (NumberFormatException e) {
                System.out.println("Invalid input!");
            }
        }

    }

    public String getName() {
        return name;
    }

    public String getProducer() {
        return producer;
    }

    public int getYear() {
        return year;
    }

    public int getSeat() {
        return seat;
    }

    public float getRootprice() {
        return rootprice;
    }

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

    public void setProducer(String producer) {
        this.producer = producer;
    }

    public void setYear(int year) {
        this.year = year;
    }

    public void setSeat(int seat) {
        this.seat = seat;
    }

    public void setRootprice(int rootprice) {
        this.rootprice = rootprice;
    }

    @Override
    public float calculateTax() {
        if (seat < 7) {
            return 0.6f * rootprice;
        }
        return 0.7f * rootprice;
    }

    @Override
    public float calculatePrice() {
        return rootprice + calculateTax();
    }

    @Override
    public void getInfor() {
        System.out.format("%s car produced by %s in %d has %d seats with the total price is %f$", name, producer, year, seat, calculatePrice());
    }

}

/*
 * 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 Buoi9;

import java.util.Scanner;

/**
 *
 * @author prdox
 */
public class LuxuryCar extends Car{
    private float specialRate;

    public LuxuryCar() {
    }

    public LuxuryCar(String name, String producer, int year, int seat, float rootprice,float specialRate) {
        super(name,producer,year,seat,rootprice);
        this.specialRate = specialRate;
    }

    public float getSpecialRate() {
        return specialRate;
    }
    
    @Override
    public void inputInfo() {
        Scanner input = new Scanner(System.in);
        super.inputInfo();
        while(true) {
            try {
                System.out.println("Nhap vao rate");
                specialRate = Float.parseFloat(input.nextLine());
                break;
            } catch (NumberFormatException e) {
                System.out.println("Invalid input!");
            }
        }
    }
    
    @Override
    public float calculatePrice(){
        return rootprice + calculateTax() + rootprice*specialRate ;
    }
    
    public float calculatePrice(float transportCost){
        return calculatePrice() + transportCost;
    }
    
    
}

/*
 * 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 Buoi9;

import java.util.Scanner;

/**
 *
 * @author prdox
 */
public class Test {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        
        LuxuryCar myLuxuryCar = new LuxuryCar();
        myLuxuryCar.inputInfo();
        myLuxuryCar.getInfor();
        System.out.println("\nTotal price is "+myLuxuryCar.calculatePrice(20000f));

    }
}