Thread: constructors

Hello,
I'm very new to Java, and I'm taking a class. I'm NOT asking for someone to do my homework, I am just asking advise. We started the switch statement, and have already had a lab for constructors. For the switch statement lab, we have a user input a product number and how much is sold, then output the total sold. My code works, but I'm positive that I'm suppose to use a constructor, I'm just not sure if it's best practice to put my variables in the constructor, or maybe some other part of the code. I googled and saw that the switch statement should NOT go in the constructor. I attached my code, and someone could offer a suggestion, I would really appreciate it

okay, will do. By the way, I heard a description of a constructor as "it's purpose is to give some value to instance variables that are inside a class." Does that sound right?
here is the code.

import java.util.Scanner;
 
public class Salesjava {
 
	public static void main(String[] args) {
 
		double product1;
		double product2;
		double product3;
		double product4;
		double product5;
 
		product1 = 2.98;
		product2 = 4.50;
		product3 = 9.98;
		product4 = 4.49;
		product5 = 6.87;
 
//		Salestest SalestestObject = new Salestest();
 
		System.out.println("Enter a product number please ");
 
		Scanner keyboard = new Scanner(System.in);
		int productnumber = keyboard.nextInt();
 
		switch (productnumber) {
 
		case 1:
			System.out.println("Enter the quantity sold please ");
 
			Scanner keyboard2 = new Scanner(System.in);
			int quantitysold = keyboard2.nextInt();
 
			System.out.print(product1 * quantitysold);
			break;
 
		case 2:
			System.out.println("Enter the quantity sold please ");
 
			Scanner keyboard3 = new Scanner(System.in);
			int quantitysold2 = keyboard3.nextInt();
 
			System.out.print(product2 * quantitysold2);
			break;
 
		case 3:
			System.out.println("Enter the quantity sold please ");
 
			Scanner keyboard4 = new Scanner(System.in);
			int quantitysold3 = keyboard4.nextInt();
 
			System.out.print(product3 * quantitysold3);
			break;
 
		case 4:
			System.out.println("Enter the quantity sold please ");
 
			Scanner keyboard5 = new Scanner(System.in);
			int quantitysold4 = keyboard5.nextInt();
 
			System.out.print(product4 * quantitysold4);
			break;
		case 5:
			System.out.println("Enter the quantity sold please ");
 
			Scanner keyboard6 = new Scanner(System.in);
			int quantitysold5 = keyboard6.nextInt();
 
			System.out.print(product5 * quantitysold5);
			break;
 
		}
 
 
	}
 
}

Thank you so much for the help!
So I take it that I could put the variables in the constructor, and tighten up the code by putting the double values on a single line.
I'll try that.