BAEL-1889 - Let's move the Java Number articles into a new module (#4619)

* BAEL-1849 - Convert from String to Date in Java * BAEL-1863 - Calling Callbacks with Mockito * BAEL-1889 - Let's move the Java Number articles into a new module * BAEL-1889 - Let's move the Java Number articles into a new module
2018-07-14 15:00:37 +02:00 · 2018-07-14 15:00:37 +02:00 · b44883b364
parent de2afd7da8
commit b44883b364
41 changed files with 380 additions and 188 deletions
--- a/algorithms/README.md
+++ b/algorithms/README.md
@ -5,7 +5,6 @@
 - [Ant Colony Optimization](http://www.baeldung.com/java-ant-colony-optimization)
 - [Validating Input With Finite Automata in Java](http://www.baeldung.com/java-finite-automata)
 - [Introduction to Jenetics Library](http://www.baeldung.com/jenetics)
- [Check If a Number Is Prime in Java](http://www.baeldung.com/java-prime-numbers)
 - [Example of Hill Climbing Algorithm](http://www.baeldung.com/java-hill-climbing-algorithm)
 - [Monte Carlo Tree Search for Tic-Tac-Toe Game](http://www.baeldung.com/java-monte-carlo-tree-search)
 - [String Search Algorithms for Large Texts](http://www.baeldung.com/java-full-text-search-algorithms)
@ -21,7 +20,6 @@
 - [Create a Sudoku Solver in Java](http://www.baeldung.com/java-sudoku)
 - [Displaying Money Amounts in Words](http://www.baeldung.com/java-money-into-words)
 - [A Collaborative Filtering Recommendation System in Java](http://www.baeldung.com/java-collaborative-filtering-recommendations)
- [Find All Pairs of Numbers in an Array That Add Up to a Given Sum](http://www.baeldung.com/java-algorithm-number-pairs-sum)
 - [Converting Between Roman and Arabic Numerals in Java](http://www.baeldung.com/java-convert-roman-arabic)
 - [Practical Java Examples of the Big O Notation](http://www.baeldung.com/java-algorithm-complexity)
 - [Find the Middle Element of a Linked List](http://www.baeldung.com/java-linked-list-middle-element)
--- a/algorithms/src/main/java/com/baeldung/algorithms/RunAlgorithm.java
+++ b/algorithms/src/main/java/com/baeldung/algorithms/RunAlgorithm.java
@ -6,7 +6,6 @@ import com.baeldung.algorithms.ga.annealing.SimulatedAnnealing;
 import com.baeldung.algorithms.ga.ant_colony.AntColonyOptimization;
 import com.baeldung.algorithms.ga.binary.SimpleGeneticAlgorithm;
 import com.baeldung.algorithms.slope_one.SlopeOne;
-import com.baeldung.algorithms.pairsaddupnumber.FindPairs;

 public class RunAlgorithm {

@ -39,12 +38,6 @@ public class RunAlgorithm {
 		case 5:
 			System.out.println("Please run the DijkstraAlgorithmTest.");
 			break;
-		case 6:
-			final FindPairs findPairs = new FindPairs();
-			final int[] input = {1, 4, 3, 2, 1, 4, 4, 3, 3};
-			final int sum = 6;
-			findPairs.execute(input, sum);
-			break;
 		default:
 			System.out.println("Unknown option");
 			break;
--- a/algorithms/src/main/java/com/baeldung/algorithms/prime/PrimeGenerator.java
+++ b/algorithms/src/main/java/com/baeldung/algorithms/prime/PrimeGenerator.java
@ -1,59 +0,0 @@
-package com.baeldung.algorithms.prime;
-
-import java.util.Arrays;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.stream.Collectors;
-import java.util.stream.IntStream;
-
-public class PrimeGenerator {
-    public static List<Integer> sieveOfEratosthenes(int n) {
-        final boolean prime[] = new boolean[n + 1];
-        Arrays.fill(prime, true);
-
-        for (int p = 2; p * p <= n; p++) {
-            if (prime[p]) {
-                for (int i = p * 2; i <= n; i += p)
-                    prime[i] = false;
-            }
-        }
-
-        final List<Integer> primes = new LinkedList<>();
-        for (int i = 2; i <= n; i++) {
-            if (prime[i])
-                primes.add(i);
-        }
-        return primes;
-    }
-
-    public static List<Integer> primeNumbersBruteForce(int max) {
-        final List<Integer> primeNumbers = new LinkedList<Integer>();
-        for (int i = 2; i <= max; i++) {
-            if (isPrimeBruteForce(i)) {
-                primeNumbers.add(i);
-            }
-        }
-        return primeNumbers;
-    }
-
-    private static boolean isPrimeBruteForce(int x) {
-        for (int i = 2; i < x; i++) {
-            if (x % i == 0) {
-                return false;
-            }
-        }
-        return true;
-    }
-
-    public static List<Integer> primeNumbersTill(int max) {
-        return IntStream.rangeClosed(2, max)
-            .filter(x -> isPrime(x))
-            .boxed()
-            .collect(Collectors.toList());
-    }
-
-    private static boolean isPrime(int x) {
-        return IntStream.rangeClosed(2, (int) (Math.sqrt(x)))
-            .allMatch(n -> x % n != 0);
-    }
-}
--- a/algorithms/src/test/java/com/baeldung/algorithms/prime/PrimeGeneratorUnitTest.java
+++ b/algorithms/src/test/java/com/baeldung/algorithms/prime/PrimeGeneratorUnitTest.java
@ -1,28 +0,0 @@
-package com.baeldung.algorithms.prime;
-
-import static com.baeldung.algorithms.prime.PrimeGenerator.*;
-
-import java.util.Arrays;
-import java.util.List;
-import org.junit.Test;
-import static org.junit.Assert.*;
-
-public class PrimeGeneratorUnitTest {
-    @Test
-    public void whenBruteForced_returnsSuccessfully() {
-        final List<Integer> primeNumbers = primeNumbersBruteForce(20);
-        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
-    }
-
-    @Test
-    public void whenOptimized_returnsSuccessfully() {
-        final List<Integer> primeNumbers = primeNumbersTill(20);
-        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
-    }
-
-    @Test
-    public void whenSieveOfEratosthenes_returnsSuccessfully() {
-        final List<Integer> primeNumbers = sieveOfEratosthenes(20);
-        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
-    }
-}
--- a/core-java-8/README.md
+++ b/core-java-8/README.md
@ -32,7 +32,6 @@
 - [“Stream has already been operated upon or closed” Exception in Java](http://www.baeldung.com/java-stream-operated-upon-or-closed-exception)
 - [Display All Time Zones With GMT And UTC in Java](http://www.baeldung.com/java-time-zones)
 - [Copy a File with Java](http://www.baeldung.com/java-copy-file)
- [Generating Prime Numbers in Java](http://www.baeldung.com/java-generate-prime-numbers)
 - [Static and Default Methods in Interfaces in Java](http://www.baeldung.com/java-static-default-methods)
 - [Iterable to Stream in Java](http://www.baeldung.com/java-iterable-to-stream)
 - [Converting String to Stream of chars](http://www.baeldung.com/java-string-to-stream)
--- a/core-java/README.md
+++ b/core-java/README.md
@ -3,7 +3,6 @@
 ## Core Java Cookbooks and Examples

 ### Relevant Articles: 
- [Java – Random Long, Float, Integer and Double](http://www.baeldung.com/java-generate-random-long-float-integer-double)
 - [Java – Generate Random String](http://www.baeldung.com/java-random-string)
 - [Java Timer](http://www.baeldung.com/java-timer-and-timertask)
 - [How to Run a Shell Command in Java](http://www.baeldung.com/run-shell-command-in-java)
@ -38,7 +37,6 @@
 - [A Quick JUnit vs TestNG Comparison](http://www.baeldung.com/junit-vs-testng)
 - [Java Primitive Conversions](http://www.baeldung.com/java-primitive-conversions)
 - [Java Money and the Currency API](http://www.baeldung.com/java-money-and-currency)
- [Using Math.pow in Java](http://www.baeldung.com/java-math-pow)
 - [Converting Strings to Enums in Java](http://www.baeldung.com/java-string-to-enum)
 - [Quick Guide to the Java StringTokenizer](http://www.baeldung.com/java-stringtokenizer)
 - [JVM Log Forging](http://www.baeldung.com/jvm-log-forging)
@ -49,7 +47,6 @@
 - [How to Add a Single Element to a Stream](http://www.baeldung.com/java-stream-append-prepend)
 - [Iterating Over Enum Values in Java](http://www.baeldung.com/java-enum-iteration)
 - [Kotlin Java Interoperability](http://www.baeldung.com/kotlin-java-interoperability)
- [How to Round a Number to N Decimal Places in Java](http://www.baeldung.com/java-round-decimal-number)
 - [Changing Annotation Parameters At Runtime](http://www.baeldung.com/java-reflection-change-annotation-params)
 - [How to Find all Getters Returning Null](http://www.baeldung.com/java-getters-returning-null)
 - [Changing the Order in a Sum Operation Can Produce Different Results?](http://www.baeldung.com/java-floating-point-sum-order)
@ -77,7 +74,6 @@
 - [“Sneaky Throws” in Java](http://www.baeldung.com/java-sneaky-throws)
 - [OutOfMemoryError: GC Overhead Limit Exceeded](http://www.baeldung.com/java-gc-overhead-limit-exceeded)
 - [StringBuilder and StringBuffer in Java](http://www.baeldung.com/java-string-builder-string-buffer)
- [Number of Digits in an Integer in Java](http://www.baeldung.com/java-number-of-digits-in-int)
 - [Creating a Java Compiler Plugin](http://www.baeldung.com/java-build-compiler-plugin)
 - [A Guide to the Static Keyword in Java](http://www.baeldung.com/java-static)
 - [Initializing Arrays in Java](http://www.baeldung.com/java-initialize-array)
@ -132,7 +128,6 @@
 - [Find Sum and Average in a Java Array](http://www.baeldung.com/java-array-sum-average)
 - [Java List UnsupportedOperationException](http://www.baeldung.com/java-list-unsupported-operation-exception)
 - [Type Erasure in Java Explained](http://www.baeldung.com/java-type-erasure)
- [BigDecimal and BigInteger in Java](http://www.baeldung.com/java-bigdecimal-biginteger)
 - [Display All Time Zones With GMT And UTC in Java](http://www.baeldung.com/java-time-zones)
 - [Join and Split Arrays and Collections in Java](http://www.baeldung.com/java-join-and-split)
 - [Check If Two Lists are Equal in Java](http://www.baeldung.com/java-test-a-list-for-ordinality-and-equality)
@ -147,7 +142,6 @@
 - [Check If a String Is Numeric in Java](http://www.baeldung.com/java-check-string-number)
 - [Variable and Method Hiding in Java](http://www.baeldung.com/java-variable-method-hiding)
 - [Access Modifiers in Java](http://www.baeldung.com/java-access-modifiers)
- [NaN in Java](http://www.baeldung.com/java-not-a-number)
 - [Infinite Loops in Java](http://www.baeldung.com/infinite-loops-java)
 - [Why Use char[] Array Over a String for Storing Passwords in Java?](http://www.baeldung.com/java-storing-passwords)
 - [Introduction to Creational Design Patterns](http://www.baeldung.com/creational-design-patterns)
--- a/core-java/pom.xml
+++ b/core-java/pom.xml
@ -25,16 +25,6 @@
            <artifactId>commons-lang3</artifactId>
            <version>${commons-lang3.version}</version>
        </dependency>
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-math3</artifactId>
-            <version>${commons-math3.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.decimal4j</groupId>
-            <artifactId>decimal4j</artifactId>
-            <version>${decimal4j.version}</version>
-        </dependency>
        <dependency>
            <groupId>org.bouncycastle</groupId>
            <artifactId>bcprov-jdk15on</artifactId>
@ -393,6 +383,7 @@
        <commons-lang3.version>3.5</commons-lang3.version>
        <bouncycastle.version>1.55</bouncycastle.version>
        <commons-codec.version>1.10</commons-codec.version>
+        <commons-io.version>2.5</commons-io.version>
        <commons-math3.version>3.6.1</commons-math3.version>
        <decimal4j.version>1.0.3</decimal4j.version>
        <unix4j.version>0.4</unix4j.version>
--- a/core-java/src/main/java/com/baeldung/maths/BigDecimalImpl.java
+++ b/core-java/src/main/java/com/baeldung/maths/BigDecimalImpl.java
@ -1,18 +0,0 @@
-package com.baeldung.maths;
-
-import java.math.BigDecimal;
-import java.math.RoundingMode;
-
-public class BigDecimalImpl {
-
-    public static void main(String[] args) {
-
-        BigDecimal serviceTax = new BigDecimal("56.0084578639");
-        serviceTax = serviceTax.setScale(2, RoundingMode.CEILING);
-
-        BigDecimal entertainmentTax = new BigDecimal("23.00689");
-        entertainmentTax = entertainmentTax.setScale(2, RoundingMode.FLOOR);
-
-        BigDecimal totalTax = serviceTax.add(entertainmentTax);
-    }
-}
--- a/core-java/src/main/java/com/baeldung/maths/BigIntegerImpl.java
+++ b/core-java/src/main/java/com/baeldung/maths/BigIntegerImpl.java
@ -1,16 +0,0 @@
-package com.baeldung.maths;
-
-import java.math.BigInteger;
-
-public class BigIntegerImpl {
-
-    public static void main(String[] args) {
-
-        BigInteger numStarsMilkyWay = new BigInteger("8731409320171337804361260816606476");
-        BigInteger numStarsAndromeda = new BigInteger("5379309320171337804361260816606476");
-
-        BigInteger totalStars = numStarsMilkyWay.add(numStarsAndromeda);
-
-    }
-
-}
--- a/java-numbers/.gitignore
+++ b/java-numbers/.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
--- a/java-numbers/README.md
+++ b/java-numbers/README.md
@ -0,0 +1,14 @@
+=========
+
+## Java Number Cookbooks and Examples
+
+### Relevant Articles: 
+- [Number of Digits in an Integer in Java](http://www.baeldung.com/java-number-of-digits-in-int)
+- [NaN in Java](http://www.baeldung.com/java-not-a-number)
+- [How to Round a Number to N Decimal Places in Java](http://www.baeldung.com/java-round-decimal-number)
+- [Check If a Number Is Prime in Java](http://www.baeldung.com/java-prime-numbers)
+- [Using Math.pow in Java](http://www.baeldung.com/java-math-pow)
+- [Generating Prime Numbers in Java](http://www.baeldung.com/java-generate-prime-numbers)
+- [BigDecimal and BigInteger in Java](http://www.baeldung.com/java-bigdecimal-biginteger)
+- [Find All Pairs of Numbers in an Array That Add Up to a Given Sum](http://www.baeldung.com/java-algorithm-number-pairs-sum)
+- [Java – Random Long, Float, Integer and Double](http://www.baeldung.com/java-generate-random-long-float-integer-double)
--- a/java-numbers/pom.xml
+++ b/java-numbers/pom.xml
@ -0,0 +1,286 @@
+<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</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <name>java-numbers</name>
+
+    <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-annprocess.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</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <configuration>
+                    <excludes>
+                        <exclude>**/*IntegrationTest.java</exclude>
+                    </excludes>
+                    <testFailureIgnore>true</testFailureIgnore>
+                </configuration>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-dependency-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>copy-dependencies</id>
+                        <phase>prepare-package</phase>
+                        <goals>
+                            <goal>copy-dependencies</goal>
+                        </goals>
+                        <configuration>
+                            <outputDirectory>${project.build.directory}/libs</outputDirectory>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>${maven-jar-plugin.version}</version>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <addClasspath>true</addClasspath>
+                            <classpathPrefix>libs/</classpathPrefix>
+                            <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+                        </manifest>
+                    </archive>
+                </configuration>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                        <configuration>
+                            <archiveBaseDirectory>${project.basedir}</archiveBaseDirectory>
+                            <archive>
+                                <manifest>
+                                    <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+                                </manifest>
+                            </archive>
+                            <descriptorRefs>
+                                <descriptorRef>jar-with-dependencies</descriptorRef>
+                            </descriptorRefs>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>${maven-shade-plugin.version}</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <shadedArtifactAttached>true</shadedArtifactAttached>
+                            <transformers>
+                                <transformer
+                                    implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+                                </transformer>
+                            </transformers>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+
+            <plugin>
+                <groupId>com.jolira</groupId>
+                <artifactId>onejar-maven-plugin</artifactId>
+                <version>${onejar-maven-plugin.version}</version>
+                <executions>
+                    <execution>
+                        <configuration>
+                            <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+                            <attachToBuild>true</attachToBuild>
+                            <filename>${project.build.finalName}-onejar.${project.packaging}</filename>
+                        </configuration>
+                        <goals>
+                            <goal>one-jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <version>${exec-maven-plugin.version}</version>
+                <configuration>
+                    <executable>java</executable>
+                    <mainClass>com.baeldung.outofmemoryerror.OutOfMemoryGCLimitExceed</mainClass>
+                    <arguments>
+                        <argument>-Xmx300m</argument>
+                        <argument>-XX:+UseParallelGC</argument>
+                        <argument>-classpath</argument>
+                        <classpath />
+                        <argument>com.baeldung.outofmemoryerror.OutOfMemoryGCLimitExceed</argument>
+                    </arguments>
+                </configuration>
+            </plugin>
+
+            <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>
+                    <plugin>
+                        <groupId>org.codehaus.mojo</groupId>
+                        <artifactId>exec-maven-plugin</artifactId>
+
+                        <executions>
+                            <execution>
+                                <id>run-benchmarks</id>
+                                <!-- <phase>integration-test</phase> -->
+                                <phase>none</phase>
+                                <goals>
+                                    <goal>exec</goal>
+                                </goals>
+                                <configuration>
+                                    <classpathScope>test</classpathScope>
+                                    <executable>java</executable>
+                                    <arguments>
+                                        <argument>-classpath</argument>
+                                        <classpath />
+                                        <argument>org.openjdk.jmh.Main</argument>
+                                        <argument>.*</argument>
+                                    </arguments>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </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>
+        <jmh-core.version>1.19</jmh-core.version>
+        <jmh-generator-annprocess.version>1.19</jmh-generator-annprocess.version>
+
+        <maven-surefire-plugin.version>2.19.1</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>
+        <onejar-maven-plugin.version>1.4.4</onejar-maven-plugin.version>
+        <maven-shade-plugin.version>3.1.1</maven-shade-plugin.version>
+    </properties>
+</project>
--- a/java-numbers/src/main/java/com/baeldung/algorithms/primechecker/BigIntegerPrimeChecker.java
+++ b/java-numbers/src/main/java/com/baeldung/algorithms/primechecker/BigIntegerPrimeChecker.java
--- a/java-numbers/src/main/java/com/baeldung/algorithms/primechecker/BruteForcePrimeChecker.java
+++ b/java-numbers/src/main/java/com/baeldung/algorithms/primechecker/BruteForcePrimeChecker.java
@ -1,7 +1,6 @@
 package com.baeldung.algorithms.primechecker;

 import java.util.stream.IntStream;
-import java.util.stream.LongStream;

 public class BruteForcePrimeChecker implements PrimeChecker<Integer> {

@ -12,5 +11,4 @@ public class BruteForcePrimeChecker implements PrimeChecker<Integer>{
            .noneMatch(n -> (number % n == 0)) : false;
    }

-    
 }
--- a/java-numbers/src/main/java/com/baeldung/algorithms/primechecker/OptimisedPrimeChecker.java
+++ b/java-numbers/src/main/java/com/baeldung/algorithms/primechecker/OptimisedPrimeChecker.java
@ -1,7 +1,6 @@
 package com.baeldung.algorithms.primechecker;

 import java.util.stream.IntStream;
-import java.util.stream.LongStream;

 public class OptimisedPrimeChecker implements PrimeChecker<Integer> {

@ -11,5 +10,4 @@ public class OptimisedPrimeChecker implements PrimeChecker<Integer>{
            .noneMatch(n -> (number % n == 0)) : false;
    }

-    
 }
--- a/java-numbers/src/main/java/com/baeldung/algorithms/primechecker/PrimeChecker.java
+++ b/java-numbers/src/main/java/com/baeldung/algorithms/primechecker/PrimeChecker.java
--- a/java-numbers/src/main/java/com/baeldung/algorithms/primechecker/PrimesPrimeChecker.java
+++ b/java-numbers/src/main/java/com/baeldung/algorithms/primechecker/PrimesPrimeChecker.java
--- a/java-numbers/src/main/java/com/baeldung/maths/FloatingPointArithmetic.java
+++ b/java-numbers/src/main/java/com/baeldung/maths/FloatingPointArithmetic.java
--- a/java-numbers/src/main/java/com/baeldung/maths/Round.java
+++ b/java-numbers/src/main/java/com/baeldung/maths/Round.java
--- a/java-numbers/src/main/java/com/baeldung/nan/NaNExample.java
+++ b/java-numbers/src/main/java/com/baeldung/nan/NaNExample.java
--- a/java-numbers/src/main/java/com/baeldung/numberofdigits/Benchmarking.java
+++ b/java-numbers/src/main/java/com/baeldung/numberofdigits/Benchmarking.java
--- a/java-numbers/src/main/java/com/baeldung/numberofdigits/NumberOfDigits.java
+++ b/java-numbers/src/main/java/com/baeldung/numberofdigits/NumberOfDigits.java
--- a/java-numbers/src/main/java/com/baeldung/numberofdigits/NumberOfDigitsDriver.java
+++ b/java-numbers/src/main/java/com/baeldung/numberofdigits/NumberOfDigitsDriver.java
--- a/algorithms/src/main/java/com/baeldung/algorithms/pairsaddupnumber/DifferentPairs.java
+++ b/algorithms/src/main/java/com/baeldung/algorithms/pairsaddupnumber/DifferentPairs.java
@ -1,4 +1,4 @@
-package com.baeldung.algorithms.pairsaddupnumber;
+package com.baeldung.pairsaddupnumber;


 import java.util.ArrayList;
@ -23,7 +23,7 @@ public class DifferentPairs {
    public static List<Integer> findPairsWithForLoop(int[] input, int sum) {
        final List<Integer> allDifferentPairs = new ArrayList<>();
        // Aux. hash map
-        final Map<Integer, Integer> pairs = new HashMap();
+        final Map<Integer, Integer> pairs = new HashMap<>();
        for (int i : input) {
            if (pairs.containsKey(i)) {
                if (pairs.get(i) != null) {
@ -51,7 +51,7 @@ public class DifferentPairs {
    public static List<Integer> findPairsWithStreamApi(int[] input, int sum) {
        final List<Integer> allDifferentPairs = new ArrayList<>();
        // Aux. hash map
-        final Map<Integer, Integer> pairs = new HashMap();
+        final Map<Integer, Integer> pairs = new HashMap<>();
        IntStream.range(0, input.length).forEach(i -> {
                    if (pairs.containsKey(input[i])) {
                        if (pairs.get(input[i]) != null) {
--- a/algorithms/src/main/java/com/baeldung/algorithms/pairsaddupnumber/ExistingPairs.java
+++ b/algorithms/src/main/java/com/baeldung/algorithms/pairsaddupnumber/ExistingPairs.java
@ -1,4 +1,4 @@
-package com.baeldung.algorithms.pairsaddupnumber;
+package com.baeldung.pairsaddupnumber;


 import java.util.ArrayList;
--- a/algorithms/src/main/java/com/baeldung/algorithms/pairsaddupnumber/FindPairs.java
+++ b/algorithms/src/main/java/com/baeldung/algorithms/pairsaddupnumber/FindPairs.java
@ -1,4 +1,4 @@
-package com.baeldung.algorithms.pairsaddupnumber;
+package com.baeldung.pairsaddupnumber;

 import java.util.ArrayList;
 import java.util.List;
--- a/java-numbers/src/main/java/com/baeldung/pow/PowerExample.java
+++ b/java-numbers/src/main/java/com/baeldung/pow/PowerExample.java
--- a/java-numbers/src/main/java/com/baeldung/prime/PrimeGenerator.java
+++ b/java-numbers/src/main/java/com/baeldung/prime/PrimeGenerator.java
--- a/java-numbers/src/main/resources/log4j.properties
+++ b/java-numbers/src/main/resources/log4j.properties
@ -0,0 +1,6 @@
+log4j.rootLogger=DEBUG, A1
+
+log4j.appender.A1=org.apache.log4j.ConsoleAppender
+
+log4j.appender.A1.layout=org.apache.log4j.PatternLayout
+log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
--- a/java-numbers/src/main/resources/logback.xml
+++ b/java-numbers/src/main/resources/logback.xml
@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
--- a/java-numbers/src/test/java/com/baeldung/algorithms/primechecker/PrimeCheckerUnitTest.java
+++ b/java-numbers/src/test/java/com/baeldung/algorithms/primechecker/PrimeCheckerUnitTest.java
@ -37,7 +37,6 @@ public class PrimeCheckerUnitTest {
        assertFalse(bfPrimeChecker.isPrime(1001));
    }

-
    private final OptimisedPrimeChecker optimisedPrimeChecker = new OptimisedPrimeChecker();

    @Test
--- a/java-numbers/src/test/java/com/baeldung/maths/BigDecimalImplUnitTest.java
+++ b/java-numbers/src/test/java/com/baeldung/maths/BigDecimalImplUnitTest.java
--- a/java-numbers/src/test/java/com/baeldung/maths/BigIntegerImplUnitTest.java
+++ b/java-numbers/src/test/java/com/baeldung/maths/BigIntegerImplUnitTest.java
--- a/java-numbers/src/test/java/com/baeldung/maths/FloatingPointArithmeticUnitTest.java
+++ b/java-numbers/src/test/java/com/baeldung/maths/FloatingPointArithmeticUnitTest.java
--- a/java-numbers/src/test/java/com/baeldung/maths/RoundUnitTest.java
+++ b/java-numbers/src/test/java/com/baeldung/maths/RoundUnitTest.java
@ -5,9 +5,6 @@ import org.decimal4j.util.DoubleRounder;
 import org.junit.Assert;
 import org.junit.Test;

-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotEquals;
-
 public class RoundUnitTest {
    private double value = 2.03456d;
    private int places = 2;
--- a/java-numbers/src/test/java/com/baeldung/numberofdigits/NumberOfDigitsIntegrationTest.java
+++ b/java-numbers/src/test/java/com/baeldung/numberofdigits/NumberOfDigitsIntegrationTest.java
--- a/algorithms/src/test/java/com/baeldung/algorithms/pairsaddupnumber/DifferentPairsUnitTest.java
+++ b/algorithms/src/test/java/com/baeldung/algorithms/pairsaddupnumber/DifferentPairsUnitTest.java
@ -1,4 +1,4 @@
-package com.baeldung.algorithms.pairsaddupnumber;
+package com.baeldung.pairsaddupnumber;

 import org.junit.Test;

--- a/algorithms/src/test/java/com/baeldung/algorithms/pairsaddupnumber/ExistingPairsUnitTest.java
+++ b/algorithms/src/test/java/com/baeldung/algorithms/pairsaddupnumber/ExistingPairsUnitTest.java
@ -1,4 +1,4 @@
-package com.baeldung.algorithms.pairsaddupnumber;
+package com.baeldung.pairsaddupnumber;

 import org.junit.Test;
 import java.util.List;
--- a/java-numbers/src/test/java/com/baeldung/prime/PrimeGeneratorUnitTest.java
+++ b/java-numbers/src/test/java/com/baeldung/prime/PrimeGeneratorUnitTest.java
@ -1,10 +1,10 @@
 package com.baeldung.prime;

-import static com.baeldung.prime.PrimeGenerator.*;
-
 import java.util.Arrays;
 import java.util.List;
 import org.junit.Test;
+
+import static com.baeldung.prime.PrimeGenerator.*;
 import static org.junit.Assert.*;

 public class PrimeGeneratorUnitTest {
--- a/java-numbers/src/test/java/com/baeldung/random/JavaRandomUnitTest.java
+++ b/java-numbers/src/test/java/com/baeldung/random/JavaRandomUnitTest.java
@ -1,4 +1,4 @@
-package org.baeldung.java;
+package com.baeldung.random;

 import org.apache.commons.lang3.RandomStringUtils;
 import org.apache.commons.math3.random.RandomDataGenerator;
--- a/pom.xml
+++ b/pom.xml
@ -76,6 +76,7 @@
        <module>persistence-modules/java-cassandra</module>
        <module>vavr</module>
        <module>java-lite</module>
+        <module>java-numbers</module>
        <module>java-rmi</module>
        <module>java-vavr-stream</module>
        <module>javax-servlets</module>