The HashMap inventory has already been declared, where Product has key attribute barcode which is of type String. The method getbarcode() is in Product. The variable p has already been declared and all attributes have already been entered.
1. Write the java code to insert p into inventory.
2. Prompt the user for a barcode and retrieve the product from the hashMap inventory.
3. Write a piece of code that prints out the names and barcodes of the objects in inventory.
4. Write a comparator class that compares Products by price.
5. Declare a priority queue that uses the comparator class in number 3 to compare Products.