Library Classes in Java

Chapter 12

Library Classes in Java

Class 10 - Logix Kips ICSE Computer Applications with BlueJ

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Java Program – Mobike Rental System

Define a class called mobike with the following description:

Instance variables/Data members:
int bno - to store the bike's number
int phno - to store the phone number of the customer
String name - to store the name of the customer
int days - to store the number of days the bike is taken on rent
int charge - to calculate and store the rental charge

Member Methods:
void input() - to input and store the details of the customer
void compute() - to compute the rental charge

The rent for a mobike is charged on the following basis:
First five days Rs 500 per day;
Next five days Rs 400 per day;
Rest of the days Rs 200 per day.

void display () - to display the details in the following format:

Bike No. Phone No. No. of days Charge

Java Program – Mobike Rental System

Java

import java.util.Scanner;
 
class mobike
{
    // Instance Variables
    int bno;
    int phno;
    String name;
    int days;
    int charge;
 
    // Method to input details
    void input()
    {
        Scanner sc = new Scanner(System.in);
 
        System.out.print("Enter Bike Number: ");
        bno = sc.nextInt();
 
        System.out.print("Enter Phone Number: ");
        phno = sc.nextInt();
 
        sc.nextLine(); // Clear buffer
 
        System.out.print("Enter Customer Name: ");
        name = sc.nextLine();
 
        System.out.print("Enter Number of Days: ");
        days = sc.nextInt();
    }
 
    // Method to compute rental charge
    void compute()
    {
        if(days <= 5)
        {
            charge = days * 500;
        }
        else if(days <= 10)
        {
            charge = (5 * 500) + (days - 5) * 400;
        }
        else
        {
            charge = (5 * 500) + (5 * 400) + (days - 10) * 200;
        }
    }
 
    // Method to display details
    void display()
    {
        System.out.println("\nBike No.\tPhone No.\tNo. of Days\tCharge");
        System.out.println(bno + "\t\t" + phno + "\t\t" + days + "\t\t" + charge);
    }
 
    // Main Method
    public static void main(String[] args)
    {
        mobike obj = new mobike();
 
        obj.input();
        obj.compute();
        obj.display();
    }
}

Output

Sample Output : 
Enter Bike Number: 101
Enter Phone Number: 987654321
Enter Customer Name: Rahul
Enter Number of Days: 12

Bike No.    Phone No.   No. of Days     Charge
101         987654321   12              6900

✔ Charge Calculation Example (12 Days)

First 5 days → 5 × 500 = 2500
Next 5 days → 5 × 400 = 2000
Remaining 2 days → 2 × 200 = 400
Total = 2500 + 2000 + 400 = 6900