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30: Create Java 9+ examples
Task-Url: #30
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‎.travis.yml‎

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language: java
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jdk:
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- openjdk11
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- openjdk14
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after_success:
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- mvn jacoco:report coveralls:jacoco -DsourceEncoding=UTF-8

‎console/functional-example/.gitignore‎

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/target
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/.settings
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/.externalToolBuilders
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/bin/

‎console/functional-example/README.md‎

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java functional
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==================
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JSR 354 Java Functional Examples
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same examples using Java 8 with streams, lambda with money-api
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---------
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- **CreateCurrencyUnit** – The currency unit, it is represented using the CurrencyUnit's interface, it's possible make a instance some forms as inform the currency code or using java.util.Locale of country of origin.
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- **CreateMonetaryCurrency** – The monetary value, this class has a strong relationship with a currency. The interface is MonetaryAmount and some implementations are:
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Money: implementation that uses BigDecimal to represents the value.
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FastMoney: this implementation uses long instead of BigDecimal, it is faster than Money, about 15
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times, however has a limited decimals places, just five.
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- **FormatExample** – format the money
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- **MonetaryFilterOperations** - You may do selection to just one or more currency unit, beyond from a value (greater than, lesser, than, greater and equal than, between, etc.).
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- **MonetaryReducerOperations** - Reducer operations such, the greatest value, lesser value, sum.
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- **MonetarySorterOperations** - Operation to do sort in a list or stream, so it's possible sort by CurrencyUnit or by value, in asc or desc way, and you can combine, in other words, I may sort by currency unit in ascending way and descending by value.
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- **MonetaryGroupOperations** - From Stream or list is possible create a summary (an object that contains informations as size of list, sum, lesser value, greater value and average), a map where the key is CurrencyUnit and the value is a list of MonetaryAmount and a map where the key is CurrencyUnit and the value is a summary of this currency unit.
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(currently **broken** because a vital class is no longer public, this example was disabled)
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- **SimpleOperations** – simples operations using MonetaryAmount, that included arithmetic operations such sum, subtract and comparative operations such lesser equal, greater equal, etc.
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‎console/functional-example/pom.xml‎

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<artifactId>javamoney-examples-console</artifactId>
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<groupId>org.javamoney.examples.console</groupId>
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<version>1.2-SNAPSHOT</version>
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</parent>
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<artifactId>functional-example</artifactId>
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<properties>
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<jdkVersion>1.8</jdkVersion>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.javamoney</groupId>
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<artifactId>moneta</artifactId>
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<version>${impl.version}</version>
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<type>${impl.type}</type>
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</dependency>
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</dependencies>
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<name>JavaMoney Console Examples Using functional in Java 8</name>
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</project>

‎console/functional-example/src/main/java/org/javamoney/examples/console/functional/BasicOperations.java‎

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/*
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* JavaMoney Examples
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* Copyright 2015-2019, Werner Keil, Anatole Tresch
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* and individual contributors by the @author tags.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.javamoney.examples.console.functional;
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import java.util.Locale;
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import javax.money.CurrencyUnit;
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import javax.money.MonetaryAmount;
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import javax.money.Monetary;
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import org.javamoney.moneta.Money;
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public class BasicOperations {
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public static void main(String[] args) {
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CurrencyUnit dollar = Monetary.getCurrency(Locale.US);
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MonetaryAmount money = Money.of(120, dollar);
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MonetaryAmount money2 = Money.of(50, dollar);
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System.out.println(money.add(money2));
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System.out.println(money.subtract(money2));
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System.out.println(money.multiply(2));
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System.out.println(money.divide(2));
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System.out.println(money.isEqualTo(money2));
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System.out.println(money.isGreaterThan(money2));
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System.out.println(money.isGreaterThanOrEqualTo(money2));
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System.out.println(money.isGreaterThanOrEqualTo(money2));
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System.out.println(money.isLessThan(money2));
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System.out.println(money.isLessThanOrEqualTo(money2));
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System.out.println(money.isNegative());
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System.out.println(money.isNegativeOrZero());
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}
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}

‎console/functional-example/src/main/java/org/javamoney/examples/console/functional/CreateCurrencyUnit.java‎

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/*
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* JavaMoney Examples
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* Copyright 2015-2019, Werner Keil, Anatole Tresch
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* and individual contributors by the @author tags.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.javamoney.examples.console.functional;
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import java.util.Locale;
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import javax.money.CurrencyUnit;
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import javax.money.Monetary;
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public class CreateCurrencyUnit
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{
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public static void main( String[] args )
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{
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CurrencyUnit real = Monetary.getCurrency("BRL");
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CurrencyUnit dollar = Monetary.getCurrency(Locale.US);
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System.out.println(real);
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System.out.println(dollar);
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}
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}

‎console/functional-example/src/main/java/org/javamoney/examples/console/functional/CreateMonetaryCurrency.java‎

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/*
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* JavaMoney Examples
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* Copyright 2015-2019, Werner Keil, Anatole Tresch
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* and individual contributors by the @author tags.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.javamoney.examples.console.functional;
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import java.util.Locale;
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import javax.money.CurrencyUnit;
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import javax.money.MonetaryAmount;
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import javax.money.Monetary;
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import org.javamoney.moneta.FastMoney;
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import org.javamoney.moneta.Money;
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public class CreateMonetaryCurrency {
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public static void main(String[] args) {
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CurrencyUnit real = Monetary.getCurrency("BRL");
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CurrencyUnit dollar = Monetary.getCurrency(Locale.US);
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MonetaryAmount money = Money.of(120, real);
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MonetaryAmount fastMoney = FastMoney.of(80, dollar);
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System.out.println(money);
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System.out.println(fastMoney);
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}
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}

‎console/functional-example/src/main/java/org/javamoney/examples/console/functional/ExchangeExample.java‎

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/*
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* JavaMoney Examples
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* Copyright 2015-2019, Werner Keil, Anatole Tresch
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* and individual contributors by the @author tags.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.javamoney.examples.console.functional;
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import java.util.Locale;
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import javax.money.CurrencyUnit;
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import javax.money.MonetaryAmount;
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import javax.money.Monetary;
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import javax.money.convert.CurrencyConversion;
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import javax.money.convert.ExchangeRateProvider;
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import javax.money.convert.MonetaryConversions;
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import org.javamoney.moneta.Money;
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public class ExchangeExample {
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public static void main(String[] args) {
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ExchangeRateProvider imfRateProvider = MonetaryConversions
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.getExchangeRateProvider("IMF");
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ExchangeRateProvider ecbRateProvider = MonetaryConversions
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.getExchangeRateProvider("ECB");
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CurrencyUnit euro = Monetary.getCurrency("EUR");
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CurrencyUnit dollar = Monetary.getCurrency(Locale.US);
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CurrencyConversion ecbDollarConvertion = ecbRateProvider
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.getCurrencyConversion(dollar);
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CurrencyConversion imfDollarConvertion = imfRateProvider
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.getCurrencyConversion(dollar);
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MonetaryAmount money = Money.of(10, euro);
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System.out.println(money.with(ecbDollarConvertion));
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System.out.println(money.with(imfDollarConvertion));
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}
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}

‎console/functional-example/src/main/java/org/javamoney/examples/console/functional/FormatExample.java‎

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/*
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* JavaMoney Examples
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* Copyright 2015-2019, Werner Keil, Anatole Tresch
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* and individual contributors by the @author tags.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.javamoney.examples.console.functional;
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import java.util.Locale;
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import javax.money.CurrencyUnit;
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import javax.money.MonetaryAmount;
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import javax.money.Monetary;
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import javax.money.format.AmountFormatQueryBuilder;
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import javax.money.format.MonetaryAmountFormat;
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import javax.money.format.MonetaryFormats;
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import org.javamoney.moneta.Money;
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import org.javamoney.moneta.format.CurrencyStyle;
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public class FormatExample {
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public static void main(String[] args) {
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CurrencyUnit dollar = Monetary.getCurrency(Locale.US);
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MonetaryAmount monetaryAmount = Money.of(1202.12D, dollar);
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MonetaryAmountFormat germanFormat = MonetaryFormats.getAmountFormat(
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Locale.GERMANY);
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MonetaryAmountFormat usFormat = MonetaryFormats.getAmountFormat(
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Locale.US);
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MonetaryAmountFormat customFormat = MonetaryFormats.getAmountFormat(
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AmountFormatQueryBuilder.of(Locale.US).set(CurrencyStyle.SYMBOL).build());
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System.out.println(germanFormat.format(monetaryAmount));//1.202,12 USD
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System.out.println(usFormat.format(monetaryAmount));//USD1,202.12
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System.out.println(customFormat.format(monetaryAmount));//$1,202.12
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}
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}

‎console/functional-example/src/main/java/org/javamoney/examples/console/functional/MonetaryFilterOperations.java‎

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/*
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* JavaMoney Examples
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* Copyright 2015-2019, Werner Keil, Anatole Tresch
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* and individual contributors by the @author tags.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.javamoney.examples.console.functional;
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import java.math.BigDecimal;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Locale;
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import java.util.stream.Collectors;
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import javax.money.CurrencyUnit;
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import javax.money.MonetaryAmount;
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import javax.money.Monetary;
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import org.javamoney.moneta.Money;
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import org.javamoney.moneta.function.MonetaryFunctions;
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public class MonetaryFilterOperations {
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private static CurrencyUnit DOLLAR = Monetary.getCurrency(Locale.US);
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private static CurrencyUnit EURO = Monetary.getCurrency("EUR");
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public static void main(String[] args) {
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MonetaryAmount money = Money.of(BigDecimal.valueOf(100D), DOLLAR);
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MonetaryAmount min = Money.of(BigDecimal.valueOf(6D), DOLLAR);
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MonetaryAmount max = Money.of(BigDecimal.valueOf(100D), DOLLAR);
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List<MonetaryAmount> moneys = getMoneys();
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List<MonetaryAmount> justDollar = moneys.stream()
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.filter((MonetaryFunctions.isCurrency(DOLLAR)))
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.collect(Collectors.toList());
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List<MonetaryAmount> notEuro = moneys.stream().filter((MonetaryFunctions.isCurrency(EURO))).collect(Collectors.toList());
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List<MonetaryAmount> dollarGreaterOneHundred = moneys.stream().filter((MonetaryFunctions.isCurrency(DOLLAR).and(MonetaryFunctions.isGreaterThan(money)))).collect(Collectors.toList());
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List<MonetaryAmount> dollarGreaterOneHundredDistinct = moneys.stream().distinct().filter((MonetaryFunctions.isCurrency(DOLLAR).and(MonetaryFunctions.isGreaterThan(money)))).collect(Collectors.toList());
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List<MonetaryAmount> between = moneys.stream().filter((MonetaryFunctions.isCurrency(DOLLAR).and(MonetaryFunctions.isBetween(min, max)))).collect(Collectors.toList());
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System.out.println(justDollar);
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System.out.println(notEuro);
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System.out.println(dollarGreaterOneHundred);
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System.out.println(dollarGreaterOneHundredDistinct);
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System.out.println(between);
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}
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private static List<MonetaryAmount> getMoneys() {
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List<MonetaryAmount> moneys = new ArrayList<>();
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moneys.add(Money.of(120, DOLLAR));
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moneys.add(Money.of(50, DOLLAR));
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moneys.add(Money.of(80, DOLLAR));
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moneys.add(Money.of(90, DOLLAR));
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moneys.add(Money.of(120, DOLLAR));
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moneys.add(Money.of(120, EURO));
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moneys.add(Money.of(50, EURO));
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moneys.add(Money.of(80, EURO));
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moneys.add(Money.of(90, EURO));
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moneys.add(Money.of(120, EURO));
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return moneys;
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}
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}

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