Merge branch 'eugenp:master' into master

akka-modules/pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <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">
+    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>akka-modules</artifactId>
     <name>akka-modules</name>

apache-spark/src/test/java/com/baeldung/dataframes/CustomerToDataFrameConverterAppUnitTest.java

@@ -8,6 +8,8 @@ import java.util.List;
 
 import org.apache.spark.sql.Dataset;
 import org.apache.spark.sql.Row;
+import org.apache.spark.sql.SparkSession;
+import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 
 class CustomerToDataFrameConverterAppUnitTest {
@@ -59,4 +61,9 @@ class CustomerToDataFrameConverterAppUnitTest {
         assertEquals( "Male", row2.getAs("gender"));
         assertEquals( 1200, (int)row2.getAs("transaction_amount"));
     }
+    
+    @AfterEach
+    public void cleanup() {
+    	SparkSession.getActiveSession().get().close();
+    }
 }

cas/cas-secured-app/pom.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project
-    xmlns="http://maven.apache.org/POM/4.0.0"
+<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>
@@ -59,4 +58,4 @@
         </plugins>
     </build>
 
-</project>
+</project>

cas/pom.xml

@@ -19,4 +19,4 @@
         <module>cas-secured-app</module>
     </modules>
 
-</project>
+</project>

core-groovy-modules/pom.xml

@@ -17,9 +17,7 @@
         <module>core-groovy</module>
         <module>core-groovy-2</module>
         <module>core-groovy-collections</module>
-        <module>core-groovy-strings</module>       
+        <module>core-groovy-strings</module>
     </modules>
 
-</project>
-
-
+</project>

core-java-modules/core-java-14/README.md

@@ -11,3 +11,4 @@ This module contains articles about Java 14.
 - [Foreign Memory Access API in Java 14](https://www.baeldung.com/java-foreign-memory-access)
 - [Java 14 Record Keyword](https://www.baeldung.com/java-record-keyword)
 - [New Features in Java 14](https://www.baeldung.com/java-14-new-features)
+- [Java 14 Record vs. Lombok](https://www.baeldung.com/java-record-vs-lombok)

core-java-modules/core-java-16/src/main/java/com/baeldung/java_16_features/groupingby/BlogPost.java

@@ -4,15 +4,15 @@ import java.util.IntSummaryStatistics;
 
 
 public class BlogPost {
-    
+
     private String title;
     private String author;
     private BlogPostType type;
     private int likes;
     record AuthPostTypesLikes(String author, BlogPostType type, int likes) {};
-    record PostcountTitlesLikesStats(long postCount, String titles, IntSummaryStatistics likesStats){};
+    record PostCountTitlesLikesStats(long postCount, String titles, IntSummaryStatistics likesStats){};
     record TitlesBoundedSumOfLikes(String titles, int boundedSumOfLikes) {};
-    
+
     public BlogPost(String title, String author, BlogPostType type, int likes) {
         this.title = title;
         this.author = author;

core-java-modules/core-java-16/src/test/java/com/baeldung/java_16_features/groupingby/JavaGroupingByCollectorUnitTest.java

@@ -257,7 +257,7 @@ public class JavaGroupingByCollectorUnitTest {
     @Test
     public void givenListOfPosts_whenGroupedByAuthor_thenGetAMapUsingCollectingAndThen() {
 
-        Map<String, BlogPost.PostcountTitlesLikesStats> postsPerAuthor = posts.stream()
+        Map<String, BlogPost.PostCountTitlesLikesStats> postsPerAuthor = posts.stream()
             .collect(groupingBy(BlogPost::getAuthor, collectingAndThen(toList(), list -> {
                 long count = list.stream()
                     .map(BlogPost::getTitle)
@@ -267,10 +267,10 @@ public class JavaGroupingByCollectorUnitTest {
                     .collect(joining(" : "));
                 IntSummaryStatistics summary = list.stream()
                     .collect(summarizingInt(BlogPost::getLikes));
-                return new BlogPost.PostcountTitlesLikesStats(count, titles, summary);
+                return new BlogPost.PostCountTitlesLikesStats(count, titles, summary);
             })));
 
-        BlogPost.PostcountTitlesLikesStats result = postsPerAuthor.get("Author 1");
+        BlogPost.PostCountTitlesLikesStats result = postsPerAuthor.get("Author 1");
         assertThat(result.postCount()).isEqualTo(3L);
         assertThat(result.titles()).isEqualTo("News item 1 : Programming guide : Tech review 2");
         assertThat(result.likesStats().getMax()).isEqualTo(20);
@@ -294,7 +294,7 @@ public class JavaGroupingByCollectorUnitTest {
                         .toUpperCase(),
                     u1.boundedSumOfLikes() + likes);
             }));
-        
+
         BlogPost.TitlesBoundedSumOfLikes result = postsPerAuthor.get("Author 1");
         assertThat(result.titles()).isEqualTo("NEWS ITEM 1 : PROGRAMMING GUIDE : TECH REVIEW 2");
         assertThat(result.boundedSumOfLikes()).isEqualTo(47);

core-java-modules/core-java-9/src/test/java/com/baeldung/java9/inputstream/outputstream/InputStreamToOutputStreamUnitTest.java

@@ -20,7 +20,7 @@ public class InputStreamToOutputStreamUnitTest {
     void copy(InputStream source, OutputStream target) throws IOException {
         byte[] buf = new byte[8192];
         int length;
-        while ((length = source.read(buf)) > 0) {
+        while ((length = source.read(buf)) != -1) {
             target.write(buf, 0, length);
         }
     }

core-java-modules/core-java-collections-4/pom.xml

@@ -25,4 +25,5 @@
     <properties>
         <commons-lang.version>2.2</commons-lang.version>
     </properties>
+
 </project>

core-java-modules/core-java-collections-list-4/pom.xml

@@ -45,18 +45,19 @@
             <artifactId>jmh-generator-annprocess</artifactId>
             <version>${jmh-generator.version}</version>
         </dependency>
-    <dependency>
-        <groupId>org.apache.commons</groupId>
-        <artifactId>commons-lang3</artifactId>
-        <version>${apache-commons.version}</version>
-    </dependency>
-    <dependency>
-        <groupId>org.assertj</groupId>
-        <artifactId>assertj-core</artifactId>
-        <version>${assertj.version}</version>
-        <scope>test</scope>
-    </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${apache-commons.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
+
     <properties>
         <trove4j.version>3.0.2</trove4j.version>
         <fastutil.version>8.1.0</fastutil.version>

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

@@ -10,3 +10,5 @@ This module contains articles about JAR files
 - [Get Names of Classes Inside a JAR File](https://www.baeldung.com/jar-file-get-class-names)
 - [Find All Jars Containing Given Class](https://baeldung.com/find-all-jars-containing-given-class/)
 - [Creating JAR Files Programmatically](https://www.baeldung.com/jar-create-programatically)
+- [Guide to Creating Jar Executables and Windows Executables from Java](https://www.baeldung.com/jar-windows-executables)
+- [Get the Full Path of a JAR File From a Class](https://www.baeldung.com/java-full-path-of-jar-from-class)

core-java-modules/core-java-lang-5/README.md

@@ -5,3 +5,4 @@ This module contains articles about core features in the Java language
 ### Relevant Articles:
 
 - [Difference Between == and equals() in Java](https://www.baeldung.com/java-equals-method-operator-difference)
+- [Advantages and Disadvantages of Using Java Wildcard Imports](https://www.baeldung.com/java-wildcard-imports)

core-java-modules/core-java-streams-4/pom.xml

@@ -43,7 +43,6 @@
             <version>3.23.1</version>
             <scope>test</scope>
         </dependency>
-
     </dependencies>
 
     <build>

core-java-modules/core-java-string-apis/README.md

@@ -11,3 +11,4 @@ This module contains articles about string APIs.
 - [StringBuilder vs StringBuffer in Java](https://www.baeldung.com/java-string-builder-string-buffer)
 - [Generate a Secure Random Password in Java](https://www.baeldung.com/java-generate-secure-password)
 - [Getting a Character by Index From a String in Java](https://www.baeldung.com/java-character-at-position)
+- [Clearing a StringBuilder or StringBuffer](https://www.baeldung.com/java-clear-stringbuilder-stringbuffer)

core-java-modules/core-java-string-operations-4/README.md

@@ -7,4 +7,4 @@
 - [String equals() Vs contentEquals() in Java](https://www.baeldung.com/java-string-equals-vs-contentequals)
 - [Check if a String Ends with a Certain Pattern in Java](https://www.baeldung.com/java-string-ends-pattern)
 - [Check if a Character is a Vowel in Java](https://www.baeldung.com/java-check-character-vowel)
-
+- [How to Truncate a String in Java](https://www.baeldung.com/java-truncating-strings)

core-java-modules/core-java-string-operations/src/test/java/com/baeldung/base64encodinganddecoding/Java8EncodeDecodeUnitTest.java

@@ -96,7 +96,23 @@ public class Java8EncodeDecodeUnitTest {
         assertNotNull(decodedMime);
     }
 
-    //
+    @Test
+    public void whenEncodedStringHasValidCharacters_thenStringCanBeDecoded() {
+        final String encodedString = "dGVzdCMkaW5wdXQ+";
+        final byte[] decodedBytes = Base64.getDecoder().decode(encodedString);
+        final String decodedString = new String(decodedBytes);
+
+        assertNotNull(decodedString);
+    }
+    
+    @Test(expected = IllegalArgumentException.class)
+    public void whenEncodedStringHasInvalidCharacters_thenIllegalArgumentException() {
+        final String encodedString = "dGVzdCMkaW5wdXQ#";
+        final byte[] decodedBytes = Base64.getDecoder().decode(encodedString);
+        final String decodedString = new String(decodedBytes);
+
+        assertNotNull(decodedString);
+    }
 
     private static StringBuilder getMimeBuffer() {
         final StringBuilder buffer = new StringBuilder();

core-java-modules/pom.xml

@@ -33,7 +33,7 @@
         <module>core-java-collections-4</module>
         <module>core-java-collections-array-list</module>
         <module>core-java-collections-conversions</module>
-        <module>core-java-collections-conversions-2</module>        
+        <module>core-java-collections-conversions-2</module>
         <module>core-java-collections-list</module>
         <module>core-java-collections-list-2</module>
         <module>core-java-collections-list-3</module>
@@ -126,7 +126,7 @@
         <module>core-java-regex</module>
         <module>core-java-regex-2</module>
         <module>core-java-uuid</module>
-        <module>pre-jpms</module>        
+        <module>pre-jpms</module>
     </modules>
 
     <dependencyManagement>
@@ -146,4 +146,4 @@
         </dependencies>
     </dependencyManagement>
 
-</project>
+</project>

docker-modules/docker-compose/pom.xml

@@ -6,7 +6,7 @@
     <artifactId>docker-compose</artifactId>
     <description>Demo project for Spring Boot and Docker</description>
 
-     <parent>
+    <parent>
         <groupId>com.baeldung</groupId>
         <artifactId>parent-boot-2</artifactId>
         <version>0.0.1-SNAPSHOT</version>
@@ -22,7 +22,6 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>

docker-modules/docker-images/pom.xml

@@ -22,7 +22,6 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>

docker-modules/docker-spring-boot/pom.xml

@@ -7,7 +7,7 @@
     <name>docker-spring-boot</name>
     <description>Demo project showing Spring Boot and Docker</description>
 
-     <parent>
+    <parent>
         <groupId>com.baeldung</groupId>
         <artifactId>parent-boot-2</artifactId>
         <version>0.0.1-SNAPSHOT</version>

feign/pom.xml

@@ -14,12 +14,6 @@
         <relativePath>../parent-boot-2</relativePath>
     </parent>
 
-    <properties>
-        <java.version>1.8</java.version>
-        <feign.version>11.8</feign.version>
-        <wsdl4j.version>1.6.3</wsdl4j.version>
-    </properties>
-
     <dependencies>
         <dependency>
             <groupId>io.github.openfeign</groupId>
@@ -121,4 +115,10 @@
         </plugins>
     </build>
 
+    <properties>
+        <java.version>1.8</java.version>
+        <feign.version>11.8</feign.version>
+        <wsdl4j.version>1.6.3</wsdl4j.version>
+    </properties>
+
 </project>

gradle-modules/README.md

@@ -0,0 +1,3 @@
+## Gradle Modules 
+
+This module contains submodules of Gradle. 

gradle-modules/gradle-5/settings.gradle

@@ -1,4 +1,4 @@
-rootProject.name='gradle-5-articles'
+rootProject.name='gradle-5'
 include 'java-exec'
 include 'unused-dependencies'
 include 'source-sets'