EDIT

/**

* Copyright (C) 2020 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.common.function;

import java.math.BigDecimal;

import java.math.MathContext;

import java.math.RoundingMode;

/**

 * This is class is for testing how BigDecimal actually works

 * and how float can be transformed to BigDecimal.

 * Can be deleted.

 *

 * @author a.mueller

 * @since 27.04.2020

 */

public class TestBigDecimal {

    public static void main(String[] args) {

        BigDecimal a5 = new BigDecimal("5");

        BigDecimal a7 = new BigDecimal("7.0");

        BigDecimal a8 = new BigDecimal("8.0");

        BigDecimal t = a5.add(a7).add(a8);

        t.precision();

        BigDecimal a3 = new BigDecimal("3");

        BigDecimal d1 = t.divide(a3, RoundingMode.HALF_EVEN);

        BigDecimal d2 = t.divide(new BigDecimal("3.00"), MathContext.DECIMAL32);

        d2.precision();

        BigDecimal d = t.divide(a3, MathContext.DECIMAL128);

        BigDecimal m = d2.multiply(a3, MathContext.DECIMAL32).stripTrailingZeros();

        BigDecimal m2 = a5.multiply(a7, MathContext.DECIMAL32).stripTrailingZeros();

        System.out.println(m);

    }

    public static void main2(String[] args) {

        BigDecimal a = new BigDecimal(new Float(2.600f).toString());

        System.out.println(a.toString());

        System.out.println(a.toPlainString());

        System.out.println(a.toEngineeringString());

        String str = a.toString();

        String strZero = "000";

        String strNine = "999";

        if (str.contains(strZero)){

            int pos = str.indexOf(strZero);

            String str2 = str.substring(0, pos);

            BigDecimal b = new BigDecimal(str2);

            System.out.println(b.toString());

        }else if (str.contains(strNine)){

            int pos = str.indexOf(strNine);

            String str2 = str.substring(0, pos);

            BigDecimal b = new BigDecimal(str2);

            b = b.add(new BigDecimal(1).movePointLeft(b.scale()));

            Float f = Float.parseFloat(b.toString());

            System.out.println(b.toString());

            System.out.println(f.toString());

        }

    }

}