q1w2.java

import java.util.*;
public class electricity
{
    int customer_id;
    String name;
    int units;
    double bill;
    double scharge;
    
    public electricity()
    {
        customer_id=0;
        name="";
        units=0;
        bill=0.0d;
        
    }
    public void input()
    {
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter your customer id");
        customer_id=sc.nextInt();
        System.out.println("Enter your name");
        name=sc.next();
        System.out.println("Enter no of units consumed");
        units=sc.nextInt();
    }
    public void calculate()
    {
        if(units<=100)
        bill=3*units;
        
        else if(units>=100 && units<=200)
        bill=300+(units-100)*5;
        
        else if(units>=200 && units<=300)
        bill=300+500+(units-200)*7;
        
        else if(units>300)
        bill=300+500+700+(units-300)*10;
        
        scharge=bill*0.05;
        bill=scharge+bill;
    }
    public void display()
    {
        System.out.println("Customer ID"+customer_id+"name"+name+"units"+units+"Bill amount"+bill);
    }
    public static void main()
    {
        electricity obj=new electricity();
        obj.input();
        obj.calculate();
        obj.display();
    }
}