absolute value Different BigDecimal - Java java.math

Java examples for java.math:BigDecimal Calculation

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Description

absolute value Different BigDecimal

Demo Code


//package com.java2s;
import java.math.BigDecimal;

public class Main {
    public static void main(String[] argv) throws Exception {
        BigDecimal v1 = new BigDecimal("1234");
        BigDecimal v2 = new BigDecimal("1234");
        System.out.println(absDiff(v1, v2));
    }/*from   ww w  .jav  a 2 s .c  o m*/

    /**
     * @return true if the ABS( ABS(v1) - ABS(v2) )
     */
    public static BigDecimal absDiff(final BigDecimal v1,
            final BigDecimal v2) {
        return abs(doSubtract(abs(v1), abs(v2)));
    }

    /**
     * Returns the ABS of the value, handles null.
     */
    public static BigDecimal abs(final BigDecimal value) {
        return value != null ? value.abs() : null;
    }

    /**
     * Subtract 2 BigDecimal safely (i.e. handles nulls) v1 - v2
     */
    private static BigDecimal doSubtract(final BigDecimal v1,
            final BigDecimal v2) {
        BigDecimal diff = v1;
        if (v1 != null && v2 != null) {
            diff = v1.subtract(v2);
        } else if (v2 != null) {
            diff = v2.negate();
        }
        return diff;
    }

    /**
     * Subtract n BigDecimal safely (i.e. handles nulls), returns 0
     */
    public static BigDecimal subtract(final BigDecimal start,
            final BigDecimal... values) {
        BigDecimal total = start != null ? start : BigDecimal.ZERO;
        if (values != null) {
            for (final BigDecimal v : values) {
                total = doSubtract(total, v);
            }
        }
        return total;
    }

    /**
     * Returns the negate of the value, handles null.
     */
    public static BigDecimal negate(final BigDecimal value) {
        return value != null ? value.negate() : null;
    }
}

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