BAEL-3506

java-math-2/README.md

@@ -0,0 +1,8 @@
+## Java Math
+
+This module contains articles about math in Java.
+
+### Relevant articles:
+
+- [Basic Calculator in Java](https://www.baeldung.com/basic-calculator-in-java)
+- More articles: [[<-- prev]](/../java-math)

java-math-2/pom.xml

@@ -0,0 +1,105 @@
+<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-math-2</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>java-math-2</name>
+    
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-math3</artifactId>
+            <version>${commons-math3.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.ejml</groupId>
+            <artifactId>ejml-all</artifactId>
+            <version>${ejml.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.nd4j</groupId>
+            <artifactId>nd4j-native</artifactId>
+            <version>${nd4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.la4j</groupId>
+            <artifactId>la4j</artifactId>
+            <version>${la4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>colt</groupId>
+            <artifactId>colt</artifactId>
+            <version>${colt.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>commons-codec</groupId>
+            <artifactId>commons-codec</artifactId>
+            <version>${commons-codec.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${org.assertj.core.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.github.dpaukov</groupId>
+            <artifactId>combinatoricslib3</artifactId>
+            <version>${combinatoricslib3.version}</version>
+         </dependency>
+        <!-- Benchmarking -->
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>${jmh.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-generator-annprocess</artifactId>
+            <version>${jmh.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <groupId>org.codehaus.mojo</groupId>
+                    <artifactId>exec-maven-plugin</artifactId>
+                    <version>${exec-maven-plugin.version}</version>
+                </plugin>
+            </plugins>
+        </pluginManagement>
+    </build>
+
+    <properties>
+        <commons-math3.version>3.6.1</commons-math3.version>
+        <org.assertj.core.version>3.9.0</org.assertj.core.version>
+        <commons-codec.version>1.11</commons-codec.version>
+        <guava.version>27.0.1-jre</guava.version>
+        <combinatoricslib3.version>3.3.0</combinatoricslib3.version>
+        <ejml.version>0.38</ejml.version>
+        <nd4j.version>1.0.0-beta4</nd4j.version>
+        <colt.version>1.2.0</colt.version>
+        <la4j.version>0.6.0</la4j.version>
+        <jmh.version>1.19</jmh.version>
+    </properties>
+
+</project>

java-math-2/src/main/java/com/baeldung/maths/calculator/basic/BasicCalculatorIfElse.java

@@ -1,4 +1,4 @@
-package com.baeldung.maths;
+package com.baeldung.maths.calculator.basic;
 
 import java.util.InputMismatchException;
 import java.util.Scanner;
@@ -7,7 +7,6 @@ public class BasicCalculatorIfElse {
 
     public static void main(String[] args) {
 
-        Scanner scanner = new Scanner(System.in);
         System.out.println("---------------------------------- \n" +
                 "Welcome to Basic Calculator \n" +
                 "----------------------------------");
@@ -16,6 +15,8 @@ public class BasicCalculatorIfElse {
                 "2. Subtraction (-) \n" +
                 "3. Multiplication (* OR x) \n" +
                 "4. Division (/) \n");
+
+        Scanner scanner = new Scanner(System.in);
         try {
             System.out.println("Enter an operator: (+ OR - OR * OR /) ");
             char operation = scanner.next().charAt(0);
@@ -47,6 +48,8 @@ public class BasicCalculatorIfElse {
             }
         } catch (InputMismatchException exc) {
             System.err.println(exc.getMessage());
+        } finally {
+            scanner.close();
         }
     }
-} 
+}

java-math-2/src/main/java/com/baeldung/maths/calculator/basic/BasicCalculatorSwitchCase.java

@@ -1,4 +1,4 @@
-package com.baeldung.maths;
+package com.baeldung.maths.calculator.basic;
 
 import java.util.InputMismatchException;
 import java.util.Scanner;
@@ -6,7 +6,6 @@ import java.util.Scanner;
 public class BasicCalculatorSwitchCase {
     public static void main(String[] args) {
 
-        Scanner scanner = new Scanner(System.in);
         System.out.println("---------------------------------- \n"
             + "Welcome to Basic Calculator \n"
             + "----------------------------------");
@@ -15,6 +14,8 @@ public class BasicCalculatorSwitchCase {
                 "2. Subtraction (-) \n" +
                 "3. Multiplication (* OR x) \n" +
                 "4. Division (/) \n");
+
+        Scanner scanner = new Scanner(System.in);
         try {
             System.out.println("Enter an operator: (+ OR - OR * OR /) ");
             char operation = scanner.next().charAt(0);
@@ -55,8 +56,9 @@ public class BasicCalculatorSwitchCase {
             }
         } catch (InputMismatchException exc) {
             System.err.println(exc.getMessage());
+        } finally {
+            scanner.close();
         }
-        scanner.close();
     }
 }
 

java-math-2/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>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>