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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

currencies, currencymismatchexception, currencyunit, illegalargumentexception

The Java example source code

 *  Copyright 2009-present, Stephen Colebourne
 *  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
 *  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.

 * Exception thrown when a monetary operation fails due to mismatched currencies.
 * <p>
 * For example, this exception would be thrown when trying to add a monetary
 * value in one currency to a monetary value in a different currency.
 * <p>
 * This exception makes no guarantees about immutability or thread-safety.
public class CurrencyMismatchException extends IllegalArgumentException {

    /** Serialization lock. */
    private static final long serialVersionUID = 1L;

    /** First currency. */
    private final CurrencyUnit firstCurrency;
    /** Second currency. */
    private final CurrencyUnit secondCurrency;

     * Constructor.
     * @param firstCurrency  the first currency, may be null
     * @param secondCurrency  the second currency, not null
    public CurrencyMismatchException(CurrencyUnit firstCurrency, CurrencyUnit secondCurrency) {
        super("Currencies differ: " +
                (firstCurrency != null ? firstCurrency.getCode() : "null") + '/' +
                (secondCurrency != null ? secondCurrency.getCode() : "null"));
        this.firstCurrency = firstCurrency;
        this.secondCurrency = secondCurrency;

     * Gets the first currency at fault.
     * @return the currency at fault, may be null
    public CurrencyUnit getFirstCurrency() {
        return firstCurrency;

     * Gets the second currency at fault.
     * @return the currency at fault, may be null
    public CurrencyUnit getSecondCurrency() {
        return secondCurrency;


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