Java: Price Utility for Handling Pricing appropriately.

price.java

package wpsmith.utils;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.text.DecimalFormat;

/**
 * Price Object.
 *
 * Price.parseDouble(myDouble).toString().
 */
public class Price {

    /**
     * Scale.
     */
    protected static int SCALE = 0;

    /**
     * Rounding Mode.
     */
    protected static RoundingMode ROUNDING_MODE = RoundingMode.HALF_UP;

    /**
     * Sets the scale for BigDecimal values.
     *
     * @param value Number of decimals.
     */
    public static void setScale(int value) {
        SCALE = value;
    }

    /**
     * Set the scale and rounding method on Big Decimal.
     *
     * @param amount Amount to format.
     * @return BigDecimal
     */
    public static BigDecimal parseBigDecimal(BigDecimal amount) {
        return amount.setScale(SCALE, ROUNDING_MODE);
    }

    /**
     * Parses a float into a Big Decimal.
     *
     * @param amount Amount to format.
     * @return BigDecimal
     */
    public static BigDecimal parseFloat(Float amount) {
        return parseBigDecimal(BigDecimal.valueOf(amount));
    }

    /**
     * Parses a float into a Big Decimal.
     *
     * @param amount Amount to format.
     * @return BigDecimal
     */
    public static BigDecimal parseInt(int amount) {
        return parseBigDecimal(BigDecimal.valueOf(amount));
    }

    /**
     * Parses a float into a Big Decimal.
     *
     * @param amount Amount to format.
     * @return BigDecimal
     */
    public static BigDecimal parseDouble(double amount) {
        return parseBigDecimal(BigDecimal.valueOf(amount));
    }

    /**
     * Parses a string into a Big Decimal.
     *
     * @param amount Amount to format.
     * @return BigDecimal
     */
    public static BigDecimal parseString(String amount) {
        return parseDouble(Double.parseDouble(amount));
    }

    /**
     * Gets decimal value as string.
     *
     * @param value BigDecimal
     * @return String
     */
    public static String getBigDecimalAsString(BigDecimal value) {
        value = Price.parseBigDecimal(value);
        DecimalFormat df = new DecimalFormat();
        df.setMaximumFractionDigits(SCALE);
        df.setMinimumFractionDigits(SCALE);
        df.setGroupingUsed(false);
        return df.format(value);
    }

}