10000 Convert between Date and YearMonth · andro-dev/Java-Coding-Problems@469355a · GitHub
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Convert between Date and YearMonth
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‎Chapter03/BONUS_1_ConvertYearMonthToDate/README.md

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# Converting `Iterable` to `List`
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Write a program that converts an `Iterable` to `List`.

‎Chapter03/BONUS_1_ConvertYearMonthToDate/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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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<groupId>com.app</groupId>
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<artifactId>BONUS_1_ConvertYearMonthToDate</artifactId>
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<version>1.0-SNAPSHOT</version>
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<packaging>jar</packaging>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<maven.compiler.source>13</maven.compiler.source>
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<maven.compiler.target>13</maven.compiler.target>
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</properties>
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<name>BONUS_1_ConvertYearMonthToDate</name>
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</project>

‎Chapter03/BONUS_1_ConvertYearMonthToDate/src/main/java/modern/challenge/Converters.java

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package modern.challenge;
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import java.time.YearMonth;
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import java.time.ZoneId;
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import java.util.Date;
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public class Converters {
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private Converters() {
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throw new AssertionError("Cannot be instantiatied");
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}
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public static YearMonth toYearMonth(Date date) {
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if (date == null) {
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throw new IllegalArgumentException("The given date cannot be null");
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}
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return YearMonth.from(date.toInstant()
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.atZone(ZoneId.systemDefault())
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.toLocalDate());
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}
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public static Date toDate(YearMonth ym) {
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if (ym == null) {
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throw new IllegalArgumentException("The given year-month cannot be null");
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}
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return Date.from(ym.atDay(1)
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.atStartOfDay(ZoneId.systemDefault()).toInstant());
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}
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}

‎Chapter03/BONUS_1_ConvertYearMonthToDate/src/main/java/modern/challenge/MainApplication.java

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package modern.challenge;
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import java.time.YearMonth;
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import java.util.Date;
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public class MainApplication {
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public static void main(String[] args) {
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System.out.println("Date to YearMonth: " + Converters.toYearMonth(new Date()));
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System.out.println("YearMonth to Date: " + Converters.toDate(YearMonth.now()));
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}
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}

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