Number Format Help

I am working on a project creating a "cash register" and I need to format prices to two decimal places. But I can not figure out how to add a number format and instantiate it to the constructor. Any advice?

Java Code:

import java.util.*;
import java.text.*;
import java.util.NumberFormat;
/*******************************************************************************
 * Create a simple class for a cash register.
 * 
 * @author George Glessner
 * @version January 26, 2015
 *******************************************************************************/
public class cashRegister{
    
    /** current amount due */
    private double currentAmount;
    
    /** daily sales */
    private double dailySales;
    
    /** number of customers */
    private int customers;
    
    /** store name */
    private String storeName;
    
    /** sales tax */
    private final double salesTax;
    
    /** number format */
    NumberFormat fmt = NumberFormat.getCurrencyInstance();
    
/***************************************************************************
Constructor for objects of class Register
****************************************************************************/
    public cashRegister(){
        currentAmount = 0.00;
        dailySales = 0.00;
        customers = 0;
        storeName = "George's Corner Store!";
        salesTax = 0.06;
        
        
        
    }

    
/**************************************************************************
Constructor for objects of class Register
Alternative constructor

@param pName name of store
***************************************************************************/
    public cashRegister(String pName){
        currentAmount = 0.00;
        dailySales = 0.00;
        customers = 0;
        storeName = pName;
        salesTax = 0.06;
        
    }
    
/***************************************************************************
Scan an item's price

@param price total price of object
****************************************************************************/
    public void price(double price){
    NumberFormat fmt = NumberFormat.getCurrencyInstance(); 
    price += currentAmount;
    System.out.println("Price: $" + fmt.format(price));
        
    }
    
/***************************************************************************
Get current amount due

@return price of item
****************************************************************************/
    public double getPrice(){
        return currentAmount;
    }
    
    
    
}