Thread: Need help figuring out this code

Where do I change the code so that on the coffee driver file the compiler recognizes the n and p on:

if (selectSort == n)
sortPrice(arr);
if (selectSort == p)
sortName(arr);

Here are my two files Items and Coffee driver




import java.util.*;
public class Items
{

private String itemName;

private double itemPrice;

public Items (String itemName, double itemPrice)
{
this.itemPrice = itemPrice;
this.itemName = itemName;
}
public Items()
{
}
public String getName()
{
return itemName;
}
public double getPrice()
{
return itemPrice;
}
public void setItemName(String someItem)
{
itemName = someItem;
}
public void setItemPrice(double somePrice)
{
itemPrice = somePrice;
}
public String toString()
{
return "Item: " + itemName + " price:" + itemPrice;
} static final Comparator<Items> NAME_ORDER = new Comparator<Items>() {
public int compare(Items e1, Items e2) {
return e1.getName().compareTo(e2.getName());
}
};
static final Comparator<Items> PRICE_ORDER = new Comparator<Items>() {
public int compare(Items e1, Items e2) {
return Double.compare(e1.getPrice(), e2.getPrice());
}
};
}






import javax.swing.*;
import java.util.*;
import java.text.*;

public class CoffeeDriver
{

public static void sortName(Items arr[]) {

Arrays.sort(arr, Items.NAME_ORDER);
String out="";
for(Items item : arr){
out+= item.toString()+"\n";
}
JOptionPane.showMessageDialog(null, out); }

public static void sortPrice(Items arr[]){

Arrays.sort(arr, Items.PRICE_ORDER);
String out="";
for(Items item : arr){
out+= item.toString()+"\n";
}
JOptionPane.showMessageDialog(null, out);
}

public static void main(String []args)
{
String userSorted;
int x;

Items arr[] = new Items[5];
arr[0] = new Items();
arr[0].setItemName("Coffee");
arr[0].setItemPrice(1.00);
arr[1] = new Items();
arr[1].setItemName("Water");
arr[1].setItemPrice(2.00);
arr[2] = new Items();
arr[2].setItemName("Milk");
arr[2].setItemPrice(1.50);
arr[3] = new Items();
arr[3].setItemName("Bagel");
arr[3].setItemPrice(1.25);
arr[4] = new Items();
arr[4].setItemName("Donut");
arr[4].setItemPrice(0.75);

int selectSort;
JOptionPane.showMessageDialog(null, "Welcome to The Coffee Shop!");
userSorted = JOptionPane.showInputDialog(null, "We have a great list items on our menu. Would you like to see these items sorted by name or by price? (n / p)");
selectSort = Integer.parseInt(userSorted);


if (selectSort == n)
sortPrice(arr);
if (selectSort == p)
sortName(arr);

System.exit(0);

i am looking at it now

thank you

first thing the n and p variables are never been declared

--- Update ---

do you want a manual input to switch the sorting?

yes

so you want this textbased?

--- Update ---

because that is easy to do

yes that is fine

ok then i am going to implement the scanner

--- Update ---

import javax.swing.*;
import java.util.*;
import java.text.*;
 
public class CoffeeDriver{
 
	//The scanner
	public static Scanner scanner = new Scanner(System.in);
 
	//string needed for the scanner
	public static String userinput;
 
	public static void sortName(Items arr[]) {
 
		Arrays.sort(arr, Items.NAME_ORDER);
		String out="";
		for(Items item : arr){
			out+= item.toString()+"\n";
		}
		JOptionPane.showMessageDialog(null, out); 
		}
 
	public static void sortPrice(Items arr[]){
 
		Arrays.sort(arr, Items.PRICE_ORDER);
		String out="";
		for(Items item : arr){
			out+= item.toString()+"\n";
		}
		JOptionPane.showMessageDialog(null, out);
	}
 
	public static void main(String []args)	{
		String userSorted;
		int x;
 
		Items arr[] = new Items[5];
		arr[0] = new Items();
		arr[0].setItemName("Coffee");
		arr[0].setItemPrice(1.00);
		arr[1] = new Items();
		arr[1].setItemName("Water");
		arr[1].setItemPrice(2.00);
		arr[2] = new Items();
		arr[2].setItemName("Milk");
		arr[2].setItemPrice(1.50);
		arr[3] = new Items();
		arr[3].setItemName("Bagel");
		arr[3].setItemPrice(1.25);
		arr[4] = new Items();
		arr[4].setItemName("Donut");
		arr[4].setItemPrice(0.75);
 
		int selectSort;
		JOptionPane.showMessageDialog(null, "Welcome to The Coffee Shop!");
		userSorted = JOptionPane.showInputDialog(null, "We have a great list items on our menu. Would you like to see these items sorted by name or by price? (n / p)");
		selectSort = Integer.parseInt(userSorted);
 
		//dialog for the decision making
		System.out.println("What should these be sorted by?");
		System.out.println("Name or price?");
		System.out.println("Type N for sorting on name.");
		System.out.println("Type P for sorting on price");
 
		//user input
		userinput = scanner.next();
 
		//input compared to the correct answer
		if (userinput.equals("P"))
			sortPrice(arr);
		if (userinput.equals("n"))
			sortName(arr);
 
		System.exit(0);
	}
}

This should do it i guess.
But wenn i test it it works fine and it trys to enter the sortPrice(arr); or sortName(arr); and then nothing happens because it is terminated.
What do you want to do with that?

--- Update ---

i have put commands where i changed stuff around. I only declared some variables and the stuf where it gets sorted]

--- Update ---

i have put commands where i changed stuff around. I only declared some variables and the stuf where it gets sorted]

--- Update ---

nevermind it works fine

srry norm i just like to help

--- Update ---

@ sfsb6 this is a way to choose between a few options with the scanner class in a textbased programm.
If you want to use it in a GUI then you should action/eventlisteners.