Java BigDecimal to toDouble(final BigDecimal b)

Description

to Double

License

Apache License

Declaration

public static Double toDouble(final BigDecimal b) 

Method Source Code

//package com.java2s;
/*//from w w  w .  j ava  2 s  .c  om
 * Copyright 2017 stanislawbartkowski@gmail.com  
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at 
 * http://www.apache.org/licenses/LICENSE-2.0 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 * See the License for the specific language governing permissions and 
 * limitations under the License.
 */

import java.math.BigDecimal;

public class Main {
    public static double toDouble(String s) {
        double d = Double.valueOf(s);
        return d;
    }

    public static Double toDouble(final BigDecimal b) {
        if (b == null) {
            return null;
        }
        String s = DecimalToS(b);
        return new Double(s);
    }

    public static String DecimalToS(final BigDecimal c, int afterdot) {
        BigDecimal cx = c.setScale(afterdot, BigDecimal.ROUND_HALF_UP);
        String ss = cx.toPlainString();
        int pos = ss.indexOf('.');
        String aDot = "";
        if (pos >= 0) {
            aDot = ss.substring(pos + 1);
            ss = ss.substring(0, pos);
        }
        if (afterdot <= 0) {
            return ss;
        }
        if (aDot.length() > afterdot) {
            aDot = aDot.substring(0, afterdot);
        }
        while (aDot.length() < afterdot) {
            aDot += "0";
        }
        return ss + "." + aDot;
    }

    public static String DecimalToS(final BigDecimal c) {
        return DecimalToS(c, 2);
    }
}

Related

1. decimalToString(BigDecimal value)
2. toBeforeDecimalPointString(BigDecimal bigDecimal)
3. toDouble(BigDecimal b, boolean allownull)
4. toDouble(BigDecimal bigDecimal)
5. toDouble(final BigDecimal b)
6. toInteger(BigDecimal b)
7. toLong(BigDecimal value)
8. toLongObject(@Nullable final BigDecimal value)
9. toNumber(final BigDecimal bigDecimal, final Class clazz)