ChestShop-3/com/Acrobot/Breeze/Utils/NumberUtil.java

package com.Acrobot.Breeze.Utils;

/**
 * @author Acrobot
 */
public class NumberUtil {
    /**
     * Checks if the string is a integer
     *
     * @param string string to check
     * @return Is the string integer?
     */
    public static boolean isInteger(String string) {
        try {
            Integer.parseInt(string);
            return true;
        } catch (NumberFormatException e) {
            return false;
        }
    }

    /**
     * Checks if the string is a float
     *
     * @param string string to check
     * @return Is the string float?
     */
    public static boolean isFloat(String string) {
        try {
            Float.parseFloat(string);
            return true;
        } catch (NumberFormatException e) {
            return false;
        }
    }

    /**
     * Checks if the string is a double
     *
     * @param string string to check
     * @return Is the string double?
     */
    public static boolean isDouble(String string) {
        try {
            Double.parseDouble(string);
            return true;
        } catch (NumberFormatException e) {
            return false;
        }
    }

    /**
     * Checks if the string is a short
     *
     * @param string string to check
     * @return Is the string short?
     */
    public static boolean isShort(String string) {
        try {
            Short.parseShort(string);
            return true;
        } catch (NumberFormatException e) {
            return false;
        }
    }

    /**
     * Rounds the number up to two decimal points (Can be inaccurate due to using decimal-points)
     *
     * @param number Number to round
     * @return Rounded number
     */
    public static double roundUp(double number) {
        return Math.ceil(number * 100) / 100;
    }
    /**
     * Rounds the number down to two decimal points
     * 
     * @param number Number to round
     * @return Rounded number
     */
    public static double roundDown(double number) {
        return Math.floor(number * 100) / 100;
    }

    /**
     * Converts the number (in seconds) to timer-like format, like 2:00 (minutes:seconds)
     *
     * @param number Number of seconds
     * @return Formatted string
     */
    public static String toTime(int number) {
        int minutes = number / 60;
        String seconds = Integer.toString(number % 60);

        if (seconds.length() != 2) {
            seconds = '0' + seconds;
        }

        return minutes + ":" + seconds;
    }

    /**
     * Converts a number to roman
     *
     * @param number number to convert
     * @return Converted number
     */
    public static String toRoman(int number) {
        if (number < 1 || number > 9) {
            throw new IllegalArgumentException("The number must be in range 1-9 (This is only for enchantment level decoration)");
        }

        switch (number) {
            case 1:
                return "I";
            case 2:
                return "II";
            case 3:
                return "III";
            case 4:
                return "IV";
            case 5:
                return "V";
            case 6:
                return "VI";
            case 7:
                return "VII";
            case 8:
                return "VIII";
            case 9:
                return "IX";
            default:
                return Integer.toString(number);
        }
    }
}