Java BigDecimal Create toBigDecimal(String text)

Description

Convertesc un string in BigDecimal

License

Open Source License

Parameter

Parameter	Description
text	a parameter

Declaration

public static BigDecimal toBigDecimal(String text) 

Method Source Code

//package com.java2s;
/*//from   w w w  .  ja  v  a  2 s .co m
 *
 * This file is part of Genome Artist.
 *
 * Genome Artist is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Genome Artist is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Genome Artist.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.text.ParsePosition;
import java.util.Locale;

public class Main {
    public static final Locale LOCALE_RO = new Locale("ro", "RO");
    private static final String BASE_FORMATER_PATTERN = "##,##0";
    /**
     * Simbolurile asociate formaterului
     */
    private static DecimalFormatSymbols decimalFormatSymbols = null;
    /**
     * Formatez un numar la defaultul local
     * @param bigDecimal
     * @param scale
     * @return
     */
    private static DecimalFormat decimalFormater = null;
    private static int formaterScale = 0;

    /**
     * Convertesc un string in BigDecimal
     * @param text
     * @return
     */
    public static BigDecimal toBigDecimal(String text) {
        if (isValidNumber(text)) {
            ParsePosition p = new ParsePosition(0);
            Number number = getDecimalFormatter(formaterScale).parse(text, p);

            //Intorc un bigdecimal
            return new BigDecimal(number.toString());
        } else
            return null;
    }

    /**
     * Verifica daca un string este numar sau nu
     * @param text
     * @return
     */
    public static boolean isValidNumber(String text) {
        ParsePosition p = new ParsePosition(0);
        try {
            getDecimalFormatter(formaterScale).parse(text, p);
            if (text.length() != p.getIndex() || p.getErrorIndex() != -1) {
                return false;
            }
        } catch (NumberFormatException nfe) {
            return false;
        }
        return true;
    }

    /**
     * Obtin un formatter pentru o anumita scara
     * @param scale
     * @return
     */
    public static NumberFormat getDecimalFormatter(int scale) {
        if (scale != formaterScale)
            initializeDecimalFormat(scale);
        return decimalFormater;
    }

    /**
     * Initializez number formaterul
     * @param scale
     */
    private static void initializeDecimalFormat(int scale) {
        //Verific initializarea simbolurilor
        if (decimalFormatSymbols == null)
            initializeFormatSymbols();

        //Initializez formaterul
        if (formaterScale != scale) {
            String decimals = "";
            if (scale > 0)
                decimals = ".";
            for (int i = 0; i < scale; i++) {
                decimals += "0";
            }

            //Initializez formaterul
            decimalFormater = new DecimalFormat(BASE_FORMATER_PATTERN + decimals, decimalFormatSymbols);
        }
    }

    /**
     * Initializez simbolurile
     */
    private static void initializeFormatSymbols() {
        decimalFormatSymbols = new DecimalFormatSymbols(LOCALE_RO);
        decimalFormatSymbols.setDecimalSeparator('.');
        decimalFormatSymbols.setGroupingSeparator(',');
        decimalFormatSymbols.setMinusSign('-');
    }
}

Related

1. toBigDecimal(final Object o)
2. toBigDecimal(final Object value)
3. toBigDecimal(Object o)
4. toBigDecimal(Object obj)
5. toBigDecimal(String bigDecimal)
6. toBigNumber(Number n)