Merge branch 'master' of https://github.com/eugenp/tutorials into BAEL-15942

java-numbers-2/.gitignore

@@ -0,0 +1,26 @@
+*.class
+
+0.*
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+.resourceCache
+
+# Packaged files #
+*.jar
+*.war
+*.ear
+
+# Files generated by integration tests
+*.txt
+backup-pom.xml
+/bin/
+/temp
+
+#IntelliJ specific
+.idea/
+*.iml

java-numbers-2/pom.xml

@@ -0,0 +1,135 @@
+<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">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>java-numbers-2</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>java-numbers-2</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>log4j</groupId>
+            <artifactId>log4j</artifactId>
+            <version>${log4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>${org.slf4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <version>${logback.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>${jmh-core.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-generator-annprocess</artifactId>
+            <version>${jmh-generator.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-math3</artifactId>
+            <version>${commons-math3.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.decimal4j</groupId>
+            <artifactId>decimal4j</artifactId>
+            <version>${decimal4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>java-numbers-2</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+
+        <plugins>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <version>${maven-javadoc-plugin.version}</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <profiles>
+        <profile>
+            <id>integration</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <phase>integration-test</phase>
+                                <goals>
+                                    <goal>test</goal>
+                                </goals>
+                                <configuration>
+                                    <includes>
+                                        <include>**/*IntegrationTest.java</include>
+                                    </includes>
+                                </configuration>
+                            </execution>
+                        </executions>
+                        <configuration>
+                            <systemPropertyVariables>
+                                <test.mime>json</test.mime>
+                            </systemPropertyVariables>
+                        </configuration>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
+
+    <properties>
+        <commons-math3.version>3.6.1</commons-math3.version>
+        <decimal4j.version>1.0.3</decimal4j.version>
+        <commons-lang3.version>3.5</commons-lang3.version>
+
+        <assertj.version>3.6.1</assertj.version>
+
+        <org.slf4j.version>1.7.21</org.slf4j.version>
+        <logback.version>1.1.7</logback.version>
+
+        <maven-surefire-plugin.version>2.21.0</maven-surefire-plugin.version>
+        <maven-javadoc-plugin.version>3.0.0-M1</maven-javadoc-plugin.version>
+        <maven-jar-plugin.version>3.0.2</maven-jar-plugin.version>
+    </properties>
+</project>

java-numbers-2/src/test/java/com/baeldung/lossyconversion/ConversionTechniquesUnitTest.java

@@ -0,0 +1,68 @@
+package com.baeldung.lossyconversion;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+public class ConversionTechniquesUnitTest {
+
+    @Test
+    public void testPrimitiveConversion() {
+        
+        long longNum = 24;
+        short shortNum = (short) longNum;
+        assertEquals(24, shortNum);
+
+        double doubleNum = 15.6;
+        int integerNum = (int) doubleNum;
+        assertEquals(15, integerNum);
+        
+        long largeLongNum = 32768;
+        short minShortNum = (short) largeLongNum;
+        assertEquals(-32768, minShortNum);
+        
+        long smallLongNum = -32769;
+        short maxShortNum = (short) smallLongNum;
+        assertEquals(32767, maxShortNum);
+        
+        long maxLong = Long.MAX_VALUE;
+        int minInt = (int) maxLong;
+        assertEquals(-1, minInt);
+        
+        long minLong = Long.MIN_VALUE;
+        int maxInt = (int) minLong;
+        assertEquals(0, maxInt);
+    }
+
+    @Test
+    public void testWrapperToPrimitiveConversion() {
+
+        Float floatNum = 17.564f;
+        long longNum = floatNum.longValue();
+        assertEquals(17, longNum);
+
+        Double doubleNum = 15.9999;
+        longNum = doubleNum.longValue();
+        assertEquals(15, longNum);
+    }
+
+    @Test
+    public void testWrapperToPrimitiveConversionUsingMathRound() {
+
+        Double doubleNum = 15.9999;
+        long longNum = Math.round(doubleNum);
+        assertEquals(16, longNum);
+    }
+    
+    @Test
+    public void testWrapperConversion() {
+
+        Double doubleNum = 10.3;
+        double dbl = doubleNum.doubleValue(); //unboxing
+        int intgr = (int) dbl; //downcasting
+        Integer intNum = Integer.valueOf(intgr);
+        assertEquals(Integer.valueOf(10), intNum);
+    }
+    
+}

pom.xml

@@ -461,6 +461,7 @@
                 <!-- <module>java-ee-8-security-api</module> --> <!-- long running -->
                 <module>java-lite</module>
                 <module>java-numbers</module>
+                <module>java-numbers-2</module>
                 <module>java-rmi</module>
                 <module>java-spi</module>
                 <module>java-streams</module>
@@ -987,7 +988,6 @@
 				<module>jws</module>
 
 				<module>libraries</module> <!-- very long running -->
-
 				<module>persistence-modules/hibernate5</module>
 				<module>persistence-modules/hibernate-mapping</module>
 				<module>persistence-modules/java-jpa</module>
@@ -1147,6 +1147,7 @@
 				<module>java-ee-8-security-api</module>
 				<module>java-lite</module>
 				<module>java-numbers</module>
+				<module>java-numbers-2</module>
 				<module>java-rmi</module>
 				<module>java-spi</module>
 				<module>java-streams</module>