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Added code examples for BAEL-4300 article.
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‎core-java-modules/core-java-lang-3/.gitignore‎

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*.class
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0.*
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#folders#
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/target
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/neoDb*
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/data
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/src/main/webapp/WEB-INF/classes
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*/META-INF/*
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.resourceCache
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# Packaged files #
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*.jar
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*.war
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*.ear
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# Files generated by integration tests
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backup-pom.xml
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/bin/
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/temp
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#IntelliJ specific
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.idea/
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*.iml

‎core-java-modules/core-java-lang-3/README.md‎

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## Core Java Lang (Part 3)
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This module contains articles about core features in the Java language
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### Relevant Articles:
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- [[<-- Prev]](/core-java-modules/core-java-lang-2)

‎core-java-modules/core-java-lang-3/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"
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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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<parent>
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<groupId>com.baeldung.core-java-modules</groupId>
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<artifactId>core-java-modules</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<relativePath>../</relativePath>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>core-java-lang-3</artifactId>
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<dependencies>
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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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</dependencies>
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<build>
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<finalName>core-java-lang-3</finalName>
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<resources>
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<resource>
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<directory>src/main/resources</directory>
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<filtering>true</filtering>
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</resource>
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</resources>
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</build>
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<properties>
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<assertj.version>3.12.2</assertj.version>
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</properties>
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</project>

‎core-java-modules/core-java-lang-3/src/test/java/com/baeldung/stringtoboolean/StringToBooleanUnitTest.java‎

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package com.baeldung.stringtoboolean;
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import static org.assertj.core.api.Assertions.assertThat;
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import org.junit.Test;
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public class StringToBooleanUnitTest
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{
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@Test
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public void givenStringTrue_whenUsingParseBoolean_thenTrue() {
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assertThat(Boolean.parseBoolean("true")).isTrue();
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}
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@Test
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public void givenStringTrue_whenUsingValueOf_thenTrue() {
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assertThat(Boolean.valueOf("true")).isTrue();
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}
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@Test
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public void givenStringTrue_whenUsingGetBoolean_thenFalse() {
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assertThat(Boolean.getBoolean("true")).isFalse();
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}
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@Test
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public void givenSystemProperty_whenUsingGetBoolean_thenTrue() {
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System.setProperty("CODING_IS_FUN", "true");
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assertThat(Boolean.getBoolean("CODING_IS_FUN")).isTrue();
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}
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}

‎core-java-modules/pom.xml‎

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<!-- <module>multimodulemavenproject</module> --> <!-- We haven't upgraded to java 9. Fixing in BAEL-10841 -->
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<module>pre-jpms</module>
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<module>core-java-lang-3</module>
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</modules>
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<build>

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