average BigDecimal in List - Android java.util

Android examples for java.util:List

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Description

average BigDecimal in List

Demo Code

/**//  w ww  .  jav  a2s.  c  o  m
 * Copyright (c) 2011 Loganalysis team and contributors
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Raffael Schmid - initial API and implementation
 */
//package com.book2s;
import java.math.BigDecimal;
import java.math.RoundingMode;

import java.util.List;

public class Main {
    public static void main(String[] argv) {
        List list = java.util.Arrays.asList("asdf", "book2s.com");
        System.out.println(avg(list));
    }

    public static BigDecimal avg(final List<BigDecimal> list) {
        return list.size() > 0 ? sum(list).setScale(10,
                RoundingMode.HALF_UP).divide(new BigDecimal(list.size()),
                RoundingMode.HALF_UP) : BigDecimal.ZERO;
    }

    public static BigDecimal sum(final List<BigDecimal> list) {
        BigDecimal total = BigDecimal.ZERO;
        for (final BigDecimal item : list) {
            total = total.add(item);
        }
        return total;
    }
}

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