Hi Friend,

Try the following code:

import java.io.*;
import java.util.*;

class Student{
public String item;
public int quantity;
public double price;
public double discount;
public double total;

public Student(){}
public Student(String item,int quantity, double price,double discount,double total) {
super();
this.item=item;
this.quantity= quantity;
this.price = price;
this.discount=discount;
this.total=total;
}
public String getItem() {
return item;
}
public int getQuantity() {
return quantity;
}
public double getPrice() {
return price;
}
public double getDiscount() {
return discount;
}
public double getTotal() {
return total;
}
}
public class CashRegisterSystem {

public static void main(String[] args) throws Exception {
double sum=0.0;
List<Student> list = new ArrayList<Student>();
Scanner scan = new Scanner(System.in);
int menu = 0;
System.out.println("School Registration System Main Menu");
System.out.println();
System.out.println("1. Food");
System.out.println("2. Water");
System.out.println("3. Magazine");
System.out.println("4. Stationary");
System.out.println("5. Toys");
System.out.println("6. Exit");

boolean quit = false;
do{
System.out.print("Please enter your choice: ");
menu = scan.nextInt();
System.out.println();

switch(menu) {
case 1:
System.out.print("Quantity: ");
int q1 = scan.nextInt();
System.out.print("Price: ");
double p1 = scan.nextDouble();
double d1=0;
double t1=(p1-(d1*p1))*q1;
list.add(new Student("Food",q1,p1,d1,t1));
break;
case 2:
System.out.print("Quantity: ");
int q2 = scan.nextInt();
System.out.print("Price: ");
double p2 = scan.nextDouble();
double d2=0.05;
double t2=(p2-(d2*p2))*q2;
list.add(new Student("Water",q2,p2,d2,t2));
break;
case 3:
System.out.print("Quantity: ");
int q3 = scan.nextInt();
System.out.print("Price: ");
double p3 = scan.nextDouble();
double d3=0.15;
double t3=(p3-(d3*p3))*q3;
list.add(new Student("Magazine",q3,p3,d3,t3));
break;
case 4:
System.out.print("Quantity: ");
int q4 = scan.nextInt();
System.out.print("Price: ");
double p4 = scan.nextDouble();
double d4=0.10;
double t4=(p4-(d4*p4))*q4;
list.add(new Student("Stationary",q4,p4,d4,t4));break;
case 5:
System.out.print("Quantity: ");
int q5 = scan.nextInt();
System.out.print("Price: ");
double p5 = scan.nextDouble();
double d5=0;
double t5=(p5-(d5*p5))*q5;
list.add(new Student("Toys",q5,p5,d5,t5));break;
case 6:
quit = true;
System.out.println("Items Quantity Price Discount(%) Total");
for (Student s : list){
System.out.println(s.getItem()+" " +s.getQuantity()+" "+s.getPrice()+" " +s.getDiscount()+" " +s.getTotal());
sum+=s.getTotal();
}
System.out.println("Total= "+sum);

break;
default:
System.out.println("Invalid Entry!");
}
}
while (!quit);
}
}

Thanks

Thanks friend..!
^_^