New to Java

I am getting I believe three erros in this code. I had it running perfect untill I added all the restock fee items.

This is what I have so far:

import java.util.*; // program uses class Scanner

public class Inventory 
{    
    // main method begins execution of Java application
   public static void main( String args[]) 
   {    
      product[] myProduct = new product[5];      

        product p1 = new product("Tom Clancy Vegas", 20003, 5, 30);
        product p2 = new product("Froger", 74512, 2, 10);
        product p3 = new product("Halo 2", 20009, 3, 45);
        product p4 = new product("Night Caster", 74522, 8, 5);
        product p5 = new product("Halo 3", 32976, 1, 50);
        
        myProduct[0] = p1;
        myProduct[1] = p2;
        myProduct[2] = p3;
        myProduct[3] = p4;
        myProduct[4] = p5;
        
        double totalValue = 0.0;
        
        for (int c=0; c < 5; c++)
        {
            totalValue = totalValue + myProduct[c].itemCalculate();
        }
        
        Arrays.sort(myProduct); // function used to sort arrays
        
        for(product p: myProduct)
        {
            System.out.println(p);
            System.out.println();
        }
       System.out.println("Total Inventory value is: $"+totalValue);
   
   } //end main
    
} //end Inventory

The above works fine, the errors appear here below (I think because I only changed the below and got errors.

import java.util.*; // program uses any class available

class product implements Comparable 
{
   private String productName; // class variable that stores the item name
   private int itemNumber; // class variable that stores the item number
   private double unitProduct; // class variable that stores the quantity in 

stock
   private double priceProduct; // class variable that stores the item price
   
    /** Creates a new instance of product */
    public product() // Constructor for Product class
     {
        productName = "";
        itemNumber = 0;
        unitProduct = 0.0;
        priceProduct = 0.0;
     }
    public product( String productName, int itemNumber, double unitProduct, 

double priceProduct) // Constructor for myProduct class
    {
        this.productName = productName;
        this.itemNumber = itemNumber;
        this.unitProduct = unitProduct;
        this.priceProduct = priceProduct;
    }
    
      public void setProductName(String name)  // Method to set the item 

name
       {
         this.productName = productName;
       }
      public String getProductName()  // Method to get the item name
       {
         return productName;
       }
      public void setItemNumber(int number)  // Method to set the item 

number
       {
         this.itemNumber = itemNumber;
       }
      public int getItemNumber()  // Method to get the item name
       {
         return itemNumber;
       }
       public void setUnitProduct(double unit)  // Method to set the item 

number
       {
         this.unitProduct = unitProduct;
       }
      public double getUnitProduct()  // Method to get the item name
       {
         return unitProduct;
       }
       public void setPriceProduct(double price)  // Method to set the item 

number
       {
         this.priceProduct = priceProduct;
       }
      public double getPriceProduct()  // Method to get the item name
       {
         return priceProduct;
       }
      
// Calculation method
  public double itemCalculate()
   {     
        return unitProduct * priceProduct; // multiply for total for 

each item
        
   } // end calculation
  public int compareTo (Object o) // use the compareTo method
    {
      product p = (product)o;
         return productName.compareTo(p.getProductName());
    }
  
  public String toString() // displays products
  {
      return "Title: "+productName+
              "\nBarcode: "+itemNumber+
              "\nNumber of Xbox games: "+(int)unitProduct+
              "\nPrice: $"+priceProduct+
              "\nTotal: $"+itemCalculate();
   } // end toString

   
}//end class Supplies