Question

Write a class Battery that models a rechargeable battery.

       totalCapacity: double

       availableBattery: double;( this contains battery charge available)

        String company;

·        having no parameter – for setting values to zero or null.

·        having two parameters for assigning values to both data members.

·        Overload the above constructor and use this keyword to set the values of data members

·        Provide getters and setters for data member(s).

·        The method public void drain (double amount) drains the capacity of the battery by the given amount.

·        The method public void charge (double amount) charges the battery by adding amount to availableBattery make sure it’s less  than totalcapacity.

·        A method toString to print object data.

1.     Inside main, create 3 objects.

a.     Set values of first object using constructor.

b.     Take data from user and set the values for the 2 objects and display values.

2.     Call all the above methods (drain, charge) and display updated values.

Answer 1

package battery;


import java.util.Scanner;


public class Battery {
   private double totalCapacity;


      private double availableBattery;


        private String company;
        
        public Battery(){
   
}
public Battery(double totalCapacity, double availableBattery){
    this.totalCapacity = totalCapacity;
    this.availableBattery = availableBattery; 
}
    void setTotalCapacity(double n){
        totalCapacity = n;
    }
    
    void setAvailableBattery(double t){
        availableBattery = t;
    }
    
    double getTotalCapacity(){
        return totalCapacity;
    }
    
    double getAvailableBattery(){
        return availableBattery;
    }
    public void charge (double amount){
        availableBattery = availableBattery + amount;
    }
    public void drain (double amount){
        availableBattery = availableBattery - amount;
    }
    public String toString(){
        return "Total Capacity " +String.valueOf(totalCapacity) +"\n Total Capacity  "+ String.valueOf(availableBattery);
    }
    public static void main(String[] args) {
        Battery first = new Battery(10,20);
        
        Battery second = new Battery();
        Scanner scan = new Scanner(System.in);
        System.out.println("Enter the total capacity");
        double total = scan.nextDouble();
        
        System.out.println("Enter the available capacity");
        double av = scan.nextDouble();
        
        second.setTotalCapacity(total);
        second.setAvailableBattery(av);
        
        
        System.out.println("Enter the total capacity");
        double total1 = scan.nextDouble();
        
        System.out.println("Enter the available capacity");
        double av1 = scan.nextDouble();
        
       
        
        Battery third = new Battery();
        
         third.setTotalCapacity(total1);
        third.setAvailableBattery(av1);
        
        System.out.println(third.toString());
        
        third.charge(10);
        
        System.out.println(third.toString());
        
        third.drain(5);
        System.out.println(third.toString());
        
        
    }
    
}