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Java example source code file (

This example Java source code file ( is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bigfraction, bigfractionfield, class, fieldelement, instance, lazyholder, object, serializable

The Java example source code

 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.apache.commons.math3.fraction;


import org.apache.commons.math3.Field;
import org.apache.commons.math3.FieldElement;

 * Representation of the fractional numbers  without any overflow field.
 * <p>
 * This class is a singleton.
 * </p>
 * @see Fraction
 * @since 2.0
public class BigFractionField implements Field<BigFraction>, Serializable  {

    /** Serializable version identifier */
    private static final long serialVersionUID = -1699294557189741703L;

    /** Private constructor for the singleton.
    private BigFractionField() {

    /** Get the unique instance.
     * @return the unique instance
    public static BigFractionField getInstance() {
        return LazyHolder.INSTANCE;

    /** {@inheritDoc} */
    public BigFraction getOne() {
        return BigFraction.ONE;

    /** {@inheritDoc} */
    public BigFraction getZero() {
        return BigFraction.ZERO;

    /** {@inheritDoc} */
    public Class<? extends FieldElement getRuntimeClass() {
        return BigFraction.class;
    // CHECKSTYLE: stop HideUtilityClassConstructor
    /** Holder for the instance.
     * <p>We use here the Initialization On Demand Holder Idiom.

*/ private static class LazyHolder { /** Cached field instance. */ private static final BigFractionField INSTANCE = new BigFractionField(); } // CHECKSTYLE: resume HideUtilityClassConstructor /** Handle deserialization of the singleton. * @return the singleton instance */ private Object readResolve() { // return the singleton instance return LazyHolder.INSTANCE; } }

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