Answer to Question #192364 in Java | JSP | JSF for King

Question

Write a java program to calculate the income of sales person per week. 

Itemcode

Item Name

Unit Price

Quantity

121

Shampoo

250.45

3

131

Soap

102.16

2

141

Talcum powder

98.23

3

145

Oxford Dictionary

500.24

4

6. Write a java application that inputs an integer containing only 0‘s and 1’s (i.e. a binary integer) and prints its decimal equivalent.

Answer 1

// task 1

import java.util.ArrayList;


public class Salesman {


	private String name;
	private ArrayList<Item> saledUnits;
	private double income, count;


	public Salesman(String n) {
		name = n;
		saledUnits = new ArrayList<>();
	}


	public void setSaled(Item i) {
		saledUnits.add(i);
	}


	public double calculateWeeklyIncome() {
		int in = 0;
		for (Item i : saledUnits) {
			in += i.unitPrice * i.quantity;
		}
		System.out.println("The weekly income of " + name + " is $" + in);
		income += in;
		return in;
	}


	public void nextWeek() {
		count += income;
		income = 0;
		saledUnits.clear();
	}


	public static class Item {
		private int itemCode;
		private String itemName;
		private double unitPrice;
		private int quantity;


		public Item(int code, String name, double price, int amount) {
			itemCode = code;
			itemName = name;
			unitPrice = price >= 0 ? price : 0;
			quantity = amount;
		}
	}


	public static void main(String args[]) {
		Salesman lewis = new Salesman("Lewis");
		lewis.setSaled(new Item(121, "Shampoo", 250.45, 3));
		lewis.setSaled(new Item(131, "Soap", 102.16, 2));
		lewis.setSaled(new Item(141, "Talcum powder", 98.23, 3));
		lewis.setSaled(new Item(145, "Oxford Dictionary", 500.24, 4));
		lewis.calculateWeeklyIncome();
		lewis.nextWeek();
	}

}

// Is it correct output or it need be more detailed, for example, 

// with the list of the saled?

// task 2

import java.util.Scanner;


public class BinaryString {


	public static void main(String args[]) {
		try (Scanner scanner = new Scanner(System.in)) {
			System.out.println("Please input a binary integer, press s to stop.");
			while (scanner.hasNext()) {
				String input= scanner.next();
				if (input.matches("[01]+")) {
					int count = input.charAt(input.length()-1)==48 ? 0 : 1; // it means 0
					for (int c = input.length() - 2, d = 2; c > -1; c--, d *= 2) {
							if (input.charAt(c) == 49) // it means 1
								count += d;						
					}
					System.out.println(count);
				} else if (input.matches("s"))
					return;
				else
					System.out.println("Input is incorrect, try again.");
			}


		}
	}
}

// thank you, this is much better