Copied over RPGame.java and inventory.txt from John-B branch

MerchantRPGCSE2102/src/config/inventory.txt

@@ -0,0 +1,11 @@
+merchant 1
+water 3
+armor 5
+food 10
+merchant 2
+wood 3
+tarp 6
+merchant 3
+glass 3
+tape 13
+rope 5

MerchantRPGCSE2102/src/game/RPGame.java

@@ -0,0 +1,62 @@
+package game;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class RPGame {
+	private ArrayList<String> merchantInventory1 = new ArrayList<String>();
+	private ArrayList<String> merchantInventory2 = new ArrayList<String>();
+	private ArrayList<String> merchantInventory3 = new ArrayList<String>();
+
+	public RPGame() {
+
+	}
+
+	// Scans src/config/inventory.txt for each merchant's inventory and stores them as the string "<item> <cost>" in the corresponding merchantInventory ArrayList
+	public void inventoryFromFile() {
+		Scanner fileScanner = null;
+		try {
+			fileScanner = new Scanner(new File("src/config/inventory.txt")); // inventory.txt must be located the config folder
+			int currentMerchant = 0; // keeps track of which merchant's inventory the scanner is reading
+			String token = null;
+			String item = null;
+
+			// Loops through each line of the text file as long as there is another line to read
+			while(fileScanner.hasNextLine()) {
+				//must start from the beginning of a line
+				token = fileScanner.next(); // first word of the line
+				if (token.equals("merchant"))
+					currentMerchant = fileScanner.nextInt();
+				else {
+					item = token + " " + fileScanner.nextInt(); // item name and cost appended together in one string
+					if (currentMerchant == 1)
+						merchantInventory1.add(item);
+					else if (currentMerchant == 2)
+						merchantInventory2.add(item);
+					else
+						merchantInventory3.add(item);
+				}
+				// advances to next line unless it has reached the end of the file
+				if (fileScanner.hasNextLine())
+					fileScanner.nextLine();
+			}
+
+		} catch (FileNotFoundException e) {	// if inventory.txt is deleted or missing
+			System.out.println("Inventory file not found");
+			e.printStackTrace();
+		}
+
+	}
+
+	// returns the list of inventory items for a specified merchant
+	public ArrayList<String> getMerchantInventory(int merchantNumber) {
+		if (merchantNumber == 1)
+			return merchantInventory1;
+		else if (merchantNumber == 2)
+			return merchantInventory2;
+		else
+			return merchantInventory3;
+	}
+}