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Feature/bael 4662 sealed classes (eugenp#10224)
* BAEL-4662: Initial commit of new module * BAEL-4662: Example with Records * BAEL-4662: Example with Interface * BAEL-4662: Add test classes * BAEL-4662: Update examples and tests * BAEL-4662: Rename test classes
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‎core-java-modules/core-java-15/.mvn/jvm.config‎

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--enable-preview

‎core-java-modules/core-java-15/README.md‎

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## Core Java 15
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This module contains articles about Java 15.
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### Relevant articles
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- TODO: add article links here

‎core-java-modules/core-java-15/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project
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xmlns="http://maven.apache.org/POM/4.0.0"
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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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<artifactId>core-java-15</artifactId>
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<name>core-java-15</name>
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<packaging>jar</packaging>
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<url>http://maven.apache.org</url>
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<parent>
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<groupId>com.baeldung</groupId>
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<artifactId>parent-modules</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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<relativePath>../../pom.xml</relativePath>
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</parent>
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<dependencies>
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-lang3</artifactId>
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<version>${apache-commons-lang3.version}</version>
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</dependency>
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<dependency>
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<groupId>org.assertj</groupId>
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<artifactId>assertj-core</artifactId>
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<version>${assertj.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-engine</artifactId>
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<version>${junit-jupiter.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-api</artifactId>
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<version>${junit-jupiter.version}</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>${maven-compiler-plugin.version}</version>
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<configuration>
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<release>${maven.compiler.release}</release>
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<compilerArgs>--enable-preview</compilerArgs>
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<source>15</source>
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<target>15</target>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>${surefire.plugin.version}</version>
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<configuration>
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<argLine>--enable-preview</argLine>
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</configuration>
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</plugin>
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</plugins>
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</build>
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<properties>
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<maven.compiler.release>15</maven.compiler.release>
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<apache-commons-lang3.version>3.11</apache-commons-lang3.version>
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<assertj.version>3.17.2</assertj.version>
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<maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
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<surefire.plugin.version>3.0.0-M3</surefire.plugin.version>
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</properties>
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</project>

‎core-java-modules/core-java-15/src/main/java/com/baeldung/sealed/alternative/Vehicles.java‎

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package com.baeldung.sealed.alternative;
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public class Vehicles {
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abstract static class Vehicle {
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private final String registrationNumber;
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public Vehicle(String registrationNumber) {
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this.registrationNumber = registrationNumber;
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}
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public String getRegistrationNumber() {
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return registrationNumber;
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}
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}
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public static final class Car extends Vehicle {
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private final int numberOfSeats;
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public Car(int numberOfSeats, String registrationNumber) {
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super(registrationNumber);
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this.numberOfSeats = numberOfSeats;
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}
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public int getNumberOfSeats() {
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return numberOfSeats;
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}
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}
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public static final class Truck extends Vehicle {
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private final int loadCapacity;
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public Truck(int loadCapacity, String registrationNumber) {
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super(registrationNumber);
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this.loadCapacity = loadCapacity;
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}
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public int getLoadCapacity() {
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return loadCapacity;
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}
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}
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}

‎core-java-modules/core-java-15/src/main/java/com/baeldung/sealed/classes/Car.java‎

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package com.baeldung.sealed.classes;
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public non-sealed class Car extends Vehicle implements Service {
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private final int numberOfSeats;
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public Car(int numberOfSeats, String registrationNumber) {
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super(registrationNumber);
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this.numberOfSeats = numberOfSeats;
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}
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public int getNumberOfSeats() {
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return numberOfSeats;
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}
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@Override
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public int getMaxServiceIntervalInMonths() {
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return 12;
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}
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}

‎core-java-modules/core-java-15/src/main/java/com/baeldung/sealed/classes/Service.java‎

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package com.baeldung.sealed.classes;
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public sealed interface Service permits Car, Truck {
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int getMaxServiceIntervalInMonths();
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default int getMaxDistanceBetweenServicesInKilometers() {
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return 100000;
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}
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}

‎core-java-modules/core-java-15/src/main/java/com/baeldung/sealed/classes/Truck.java‎

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package com.baeldung.sealed.classes;
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public final class Truck extends Vehicle implements Service {
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private final int loadCapacity;
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public Truck(int loadCapacity, String registrationNumber) {
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super(registrationNumber);
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this.loadCapacity = loadCapacity;
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}
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public int getLoadCapacity() {
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return loadCapacity;
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}
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@Override
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public int getMaxServiceIntervalInMonths() {
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return 18;
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}
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}

‎core-java-modules/core-java-15/src/main/java/com/baeldung/sealed/classes/Vehicle.java‎

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package com.baeldung.sealed.classes;
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public abstract sealed class Vehicle permits Car, Truck {
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protected final String registrationNumber;
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public Vehicle(String registrationNumber) {
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this.registrationNumber = registrationNumber;
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}
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public String getRegistrationNumber() {
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return registrationNumber;
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}
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}

‎core-java-modules/core-java-15/src/main/java/com/baeldung/sealed/records/Car.java‎

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package com.baeldung.sealed.records;
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public record Car(int numberOfSeats, String registrationNumber) implements Vehicle {
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@Override
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public String getRegistrationNumber() {
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return registrationNumber;
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}
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public int getNumberOfSeats() {
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return numberOfSeats;
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}
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}

‎core-java-modules/core-java-15/src/main/java/com/baeldung/sealed/records/Truck.java‎

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package com.baeldung.sealed.records;
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public record Truck(int loadCapacity, String registrationNumber) implements Vehicle {
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@Override
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public String getRegistrationNumber() {
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return registrationNumber;
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}
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public int getLoadCapacity() {
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return loadCapacity;
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}
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}

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