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Merge branch 'master' into BAEL-1423-jctools

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2
.gitignore vendored
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@ -34,8 +34,6 @@ spring-security-openid/src/main/resources/application.properties
spring-all/*.log
*.jar
SpringDataInjectionDemo/.mvn/wrapper/maven-wrapper.properties
spring-call-getters-using-reflection/.mvn/wrapper/maven-wrapper.properties

2
activejdbc/README.md Normal file
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@ -0,0 +1,2 @@
### Relevant Articles:
- [Introduction to ActiveJDBC](http://www.baeldung.com/active-jdbc)

253
activejdbc/pom.xml
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@ -1,129 +1,134 @@
<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>
<groupId>com.baeldung</groupId>
<artifactId>activejdbc</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>activejdbc</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<activejdbc.version>1.4.13</activejdbc.version>
<environments>development.test,development</environments>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.javalite</groupId>
<artifactId>activejdbc-instrumentation</artifactId>
<version>${activejdbc.version}</version>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>instrument</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.javalite</groupId>
<artifactId>db-migrator-maven-plugin</artifactId>
<version>${activejdbc.version}</version>
<configuration>
<configFile>${project.basedir}/src/main/resources/database.properties</configFile>
<environments>${environments}</environments>
</configuration>
<dependencies>
<dependency>
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>
<groupId>com.baeldung</groupId>
<artifactId>activejdbc</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>activejdbc</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<activejdbc.version>1.4.13</activejdbc.version>
<environments>development.test,development</environments>
</properties>
<parent>
<artifactId>parent-modules</artifactId>
<groupId>com.baeldung</groupId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.javalite</groupId>
<artifactId>activejdbc-instrumentation</artifactId>
<version>${activejdbc.version}</version>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>instrument</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.javalite</groupId>
<artifactId>db-migrator-maven-plugin</artifactId>
<version>${activejdbc.version}</version>
<configuration>
<configFile>${project.basedir}/src/main/resources/database.properties</configFile>
<environments>${environments}</environments>
</configuration>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.34</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.18.1</version>
<configuration>
<reportFormat>brief</reportFormat>
<trimStackTrace>true</trimStackTrace>
<useFile>false</useFile>
<includes>
<include>**/*Spec*.java</include>
<include>**/*Test*.java</include>
</includes>
<excludes>
<exclude>**/helpers/*</exclude>
<exclude>**/*$*</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.javalite</groupId>
<artifactId>activejdbc</artifactId>
<version>${activejdbc.version}</version>
<exclusions>
<exclusion>
<groupId>opensymphony</groupId>
<artifactId>oscache</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.34</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.18.1</version>
<configuration>
<reportFormat>brief</reportFormat>
<trimStackTrace>true</trimStackTrace>
<useFile>false</useFile>
<includes>
<include>**/*Spec*.java</include>
<include>**/*Test*.java</include>
</includes>
<excludes>
<exclude>**/helpers/*</exclude>
<exclude>**/*$*</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.javalite</groupId>
<artifactId>activejdbc</artifactId>
<version>${activejdbc.version}</version>
<exclusions>
<exclusion>
<groupId>opensymphony</groupId>
<artifactId>oscache</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.34</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.9</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>snapshots1</id>
<name>JavaLite Snapshots1</name>
<url>http://repo.javalite.io/</url>
<snapshots>
<enabled>true</enabled>
<updatePolicy>always</updatePolicy>
<checksumPolicy>warn</checksumPolicy>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>snapshots2</id>
<name>JavaLite Snapshots2</name>
<url>http://repo.javalite.io/</url>
<snapshots>
<enabled>true</enabled>
<updatePolicy>always</updatePolicy>
<checksumPolicy>warn</checksumPolicy>
</snapshots>
</pluginRepository>
</pluginRepositories>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.9</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>snapshots1</id>
<name>JavaLite Snapshots1</name>
<url>http://repo.javalite.io/</url>
<snapshots>
<enabled>true</enabled>
<updatePolicy>always</updatePolicy>
<checksumPolicy>warn</checksumPolicy>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>snapshots2</id>
<name>JavaLite Snapshots2</name>
<url>http://repo.javalite.io/</url>
<snapshots>
<enabled>true</enabled>
<updatePolicy>always</updatePolicy>
<checksumPolicy>warn</checksumPolicy>
</snapshots>
</pluginRepository>
</pluginRepositories>
</project>

3
algorithms/README.md
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@ -17,3 +17,6 @@
- [How to Calculate Levenshtein Distance in Java?](http://www.baeldung.com/java-levenshtein-distance)
- [How to Find the Kth Largest Element in Java](http://www.baeldung.com/java-kth-largest-element)
- [Multi-Swarm Optimization Algorithm in Java](http://www.baeldung.com/java-multi-swarm-algorithm)
- [A Maze Solver in Java](http://www.baeldung.com/java-solve-maze)
- [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)

6
animal-sniffer-mvn-plugin/pom.xml
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@ -11,7 +11,11 @@
<properties>
<maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
</properties>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>junit</groupId>

2
apache-cayenne/src/test/java/com/baeldung/apachecayenne/CayenneAdvancedOperationTests.java → apache-cayenne/src/test/java/com/baeldung/apachecayenne/CayenneAdvancedOperationIntegrationTest.java
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@ -19,7 +19,7 @@ import java.util.List;
import static junit.framework.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
public class CayenneAdvancedOperationTests {
public class CayenneAdvancedOperationIntegrationTest {
private static ObjectContext context = null;
@BeforeClass

2
apache-cayenne/src/test/java/com/baeldung/apachecayenne/CayenneOperationTests.java → apache-cayenne/src/test/java/com/baeldung/apachecayenne/CayenneOperationIntegrationTest.java
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@ -16,7 +16,7 @@ import static junit.framework.Assert.assertEquals;
import static org.junit.Assert.assertNull;
public class CayenneOperationTests {
public class CayenneOperationIntegrationTest {
private static ObjectContext context = null;
@BeforeClass

3
apache-curator/README.md Normal file
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@ -0,0 +1,3 @@
### Relevant Articles:
- [Introduction to Apache Curator](http://www.baeldung.com/apache-curator)

32
apache-opennlp/pom.xml Normal file
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@ -0,0 +1,32 @@
<?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">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<artifactId>apache-opennlp</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>org.apache.opennlp</groupId>
<artifactId>opennlp-tools</artifactId>
<version>1.8.4</version>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>3.9.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>

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apache-opennlp/src/test/java/com/baeldung/apache/opennlp/ChunkerTest.java Normal file
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@ -0,0 +1,32 @@
package com.baeldung.apache.opennlp;
import java.io.FileInputStream;
import java.io.InputStream;
import opennlp.tools.chunker.ChunkerME;
import opennlp.tools.chunker.ChunkerModel;
import opennlp.tools.postag.POSModel;
import opennlp.tools.postag.POSTaggerME;
import opennlp.tools.tokenize.SimpleTokenizer;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
public class ChunkerTest {
@Test
public void givenChunkerModel_whenChunk_thenChunksAreDetected() throws Exception {
SimpleTokenizer tokenizer = SimpleTokenizer.INSTANCE;
String[] tokens = tokenizer.tokenize("He reckons the current account deficit will narrow to only 8 billion.");
InputStream inputStreamPOSTagger = getClass().getResourceAsStream("/models/en-pos-maxent.bin");
POSModel posModel = new POSModel(inputStreamPOSTagger);
POSTaggerME posTagger = new POSTaggerME(posModel);
String tags[] = posTagger.tag(tokens);
InputStream inputStreamChunker = new FileInputStream("src/main/resources/models/en-chunker.bin");
ChunkerModel chunkerModel = new ChunkerModel(inputStreamChunker);
ChunkerME chunker = new ChunkerME(chunkerModel);
String[] chunks = chunker.chunk(tokens, tags);
assertThat(chunks).contains("B-NP", "B-VP", "B-NP", "I-NP", "I-NP", "I-NP", "B-VP", "I-VP", "B-PP", "B-NP", "I-NP", "I-NP", "O");
}
}

44
apache-opennlp/src/test/java/com/baeldung/apache/opennlp/LanguageDetectorAndTrainingDataTest.java Normal file
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@ -0,0 +1,44 @@
package com.baeldung.apache.opennlp;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Arrays;
import opennlp.tools.langdetect.Language;
import opennlp.tools.langdetect.LanguageDetector;
import opennlp.tools.langdetect.LanguageDetectorFactory;
import opennlp.tools.langdetect.LanguageDetectorME;
import opennlp.tools.langdetect.LanguageDetectorModel;
import opennlp.tools.langdetect.LanguageDetectorSampleStream;
import opennlp.tools.util.InputStreamFactory;
import opennlp.tools.util.MarkableFileInputStreamFactory;
import opennlp.tools.util.ObjectStream;
import opennlp.tools.util.PlainTextByLineStream;
import opennlp.tools.util.TrainingParameters;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.tuple;
import org.junit.Test;
public class LanguageDetectorAndTrainingDataTest {
@Test
public void givenLanguageDictionary_whenLanguageDetect_thenLanguageIsDetected() throws FileNotFoundException, IOException {
InputStreamFactory dataIn = new MarkableFileInputStreamFactory(new File("src/main/resources/models/DoccatSample.txt"));
ObjectStream lineStream = new PlainTextByLineStream(dataIn, "UTF-8");
LanguageDetectorSampleStream sampleStream = new LanguageDetectorSampleStream(lineStream);
TrainingParameters params = new TrainingParameters();
params.put(TrainingParameters.ITERATIONS_PARAM, 100);
params.put(TrainingParameters.CUTOFF_PARAM, 5);
params.put("DataIndexer", "TwoPass");
params.put(TrainingParameters.ALGORITHM_PARAM, "NAIVEBAYES");
LanguageDetectorModel model = LanguageDetectorME.train(sampleStream, params, new LanguageDetectorFactory());
LanguageDetector ld = new LanguageDetectorME(model);
Language[] languages = ld.predictLanguages("estava em uma marcenaria na Rua Bruno");
assertThat(Arrays.asList(languages)).extracting("lang", "confidence").contains(tuple("pob", 0.9999999950605625),
tuple("ita", 4.939427661577956E-9), tuple("spa", 9.665954064665144E-15),
tuple("fra", 8.250349924885834E-25));
}
}

29
apache-opennlp/src/test/java/com/baeldung/apache/opennlp/LemmetizerTest.java Normal file
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@ -0,0 +1,29 @@
package com.baeldung.apache.opennlp;
import java.io.InputStream;
import opennlp.tools.lemmatizer.DictionaryLemmatizer;
import opennlp.tools.postag.POSModel;
import opennlp.tools.postag.POSTaggerME;
import opennlp.tools.tokenize.SimpleTokenizer;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
public class LemmetizerTest {
@Test
public void givenEnglishDictionary_whenLemmatize_thenLemmasAreDetected() throws Exception {
SimpleTokenizer tokenizer = SimpleTokenizer.INSTANCE;
String[] tokens = tokenizer.tokenize("John has a sister named Penny.");
InputStream inputStreamPOSTagger = getClass().getResourceAsStream("/models/en-pos-maxent.bin");
POSModel posModel = new POSModel(inputStreamPOSTagger);
POSTaggerME posTagger = new POSTaggerME(posModel);
String tags[] = posTagger.tag(tokens);
InputStream dictLemmatizer = getClass().getResourceAsStream("/models/en-lemmatizer.dict");
DictionaryLemmatizer lemmatizer = new DictionaryLemmatizer(dictLemmatizer);
String[] lemmas = lemmatizer.lemmatize(tokens, tags);
assertThat(lemmas).contains("O", "have", "a", "sister", "name", "O", "O");
}
}

39
apache-opennlp/src/test/java/com/baeldung/apache/opennlp/NamedEntityRecognitionTest.java Normal file
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@ -0,0 +1,39 @@
package com.baeldung.apache.opennlp;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import opennlp.tools.namefind.NameFinderME;
import opennlp.tools.namefind.TokenNameFinderModel;
import opennlp.tools.tokenize.SimpleTokenizer;
import opennlp.tools.util.Span;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
public class NamedEntityRecognitionTest {
@Test
public void givenEnglishPersonModel_whenNER_thenPersonsAreDetected() throws Exception {
SimpleTokenizer tokenizer = SimpleTokenizer.INSTANCE;
String[] tokens = tokenizer.tokenize("John is 26 years old. His best friend's name is Leonard. He has a sister named Penny.");
InputStream inputStreamNameFinder = getClass().getResourceAsStream("/models/en-ner-person.bin");
TokenNameFinderModel model = new TokenNameFinderModel(inputStreamNameFinder);
NameFinderME nameFinderME = new NameFinderME(model);
List<Span> spans = Arrays.asList(nameFinderME.find(tokens));
assertThat(spans.toString()).isEqualTo("[[0..1) person, [13..14) person, [20..21) person]");
List<String> names = new ArrayList<String>();
int k = 0;
for (Span s : spans) {
names.add("");
for (int index = s.getStart(); index < s.getEnd(); index++) {
names.set(k, names.get(k) + tokens[index]);
}
k++;
}
assertThat(names).contains("John","Leonard","Penny");
}
}

24
apache-opennlp/src/test/java/com/baeldung/apache/opennlp/POSTaggerTest.java Normal file
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@ -0,0 +1,24 @@
package com.baeldung.apache.opennlp;
import java.io.InputStream;
import opennlp.tools.postag.POSModel;
import opennlp.tools.postag.POSTaggerME;
import opennlp.tools.tokenize.SimpleTokenizer;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
public class POSTaggerTest {
@Test
public void givenPOSModel_whenPOSTagging_thenPOSAreDetected() throws Exception {
SimpleTokenizer tokenizer = SimpleTokenizer.INSTANCE;
String[] tokens = tokenizer.tokenize("John has a sister named Penny.");
InputStream inputStreamPOSTagger = getClass().getResourceAsStream("/models/en-pos-maxent.bin");
POSModel posModel = new POSModel(inputStreamPOSTagger);
POSTaggerME posTagger = new POSTaggerME(posModel);
String tags[] = posTagger.tag(tokens);
assertThat(tags).contains("NNP", "VBZ", "DT", "NN", "VBN", "NNP", ".");
}
}

28
apache-opennlp/src/test/java/com/baeldung/apache/opennlp/SentenceDetectionTest.java Normal file
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@ -0,0 +1,28 @@
package com.baeldung.apache.opennlp;
import java.io.InputStream;
import opennlp.tools.sentdetect.SentenceDetectorME;
import opennlp.tools.sentdetect.SentenceModel;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
public class SentenceDetectionTest {
@Test
public void givenEnglishModel_whenDetect_thenSentencesAreDetected() throws Exception {
String paragraph = "This is a statement. This is another statement. Now is an abstract word for time, "
+ "that is always flying. And my email address is google@gmail.com.";
InputStream is = getClass().getResourceAsStream("/models/en-sent.bin");
SentenceModel model = new SentenceModel(is);
SentenceDetectorME sdetector = new SentenceDetectorME(model);
String sentences[] = sdetector.sentDetect(paragraph);
assertThat(sentences).contains("This is a statement.",
"This is another statement.",
"Now is an abstract word for time, that is always flying.",
"And my email address is google@gmail.com.");
}
}

36
apache-opennlp/src/test/java/com/baeldung/apache/opennlp/TokenizerTest.java Normal file
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@ -0,0 +1,36 @@
package com.baeldung.apache.opennlp;
import java.io.InputStream;
import opennlp.tools.tokenize.SimpleTokenizer;
import opennlp.tools.tokenize.TokenizerME;
import opennlp.tools.tokenize.TokenizerModel;
import opennlp.tools.tokenize.WhitespaceTokenizer;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
public class TokenizerTest {
@Test
public void givenEnglishModel_whenTokenize_thenTokensAreDetected() throws Exception {
InputStream inputStream = getClass().getResourceAsStream("/models/en-token.bin");
TokenizerModel model = new TokenizerModel(inputStream);
TokenizerME tokenizer = new TokenizerME(model);
String[] tokens = tokenizer.tokenize("Baeldung is a Spring Resource.");
assertThat(tokens).contains("Baeldung", "is", "a", "Spring", "Resource", ".");
}
@Test
public void givenWhitespaceTokenizer_whenTokenize_thenTokensAreDetected() throws Exception {
WhitespaceTokenizer tokenizer = WhitespaceTokenizer.INSTANCE;
String[] tokens = tokenizer.tokenize("Baeldung is a Spring Resource.");
assertThat(tokens).contains("Baeldung", "is", "a", "Spring", "Resource.");
}
@Test
public void givenSimpleTokenizer_whenTokenize_thenTokensAreDetected() throws Exception {
SimpleTokenizer tokenizer = SimpleTokenizer.INSTANCE;
String[] tokens = tokenizer.tokenize("Baeldung is a Spring Resource.");
assertThat(tokens).contains("Baeldung", "is", "a", "Spring", "Resource", ".");
}
}

6
apache-spark/pom.xml
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@ -13,7 +13,11 @@
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.apache.spark/spark-core_2.10 -->
<dependency>

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apache-tika/README.md Normal file
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@ -0,0 +1,3 @@
## Relevant articles:
- [Content Analysis with Apache Tika](http://www.baeldung.com/apache-tika)

3
apache-zookeeper/README.md Normal file
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@ -0,0 +1,3 @@
## Relevant articles:
- [Getting Started with Java and Zookeeper](http://www.baeldung.com/java-zookeeper)

12
asm/pom.xml
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@ -1,10 +1,16 @@
<?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">
<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>
<groupId>com.baeldung.examples</groupId>
<artifactId>asm</artifactId>
<version>1.0</version>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.ow2.asm</groupId>
@ -17,12 +23,14 @@
<version>5.2</version>
</dependency>
</dependencies>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<build>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>

3
aws/README.md
View File

@ -3,5 +3,6 @@
- [AWS Lambda Using DynamoDB With Java](http://www.baeldung.com/aws-lambda-dynamodb-java)
- [AWS S3 with Java](http://www.baeldung.com/aws-s3-java)
- [AWS Lambda With Java](http://www.baeldung.com/java-aws-lambda)
- [Managing EC2 Instances in Java] (http://www.baeldung.com/ec2-java)
- [Managing EC2 Instances in Java](http://www.baeldung.com/ec2-java)
- [http://www.baeldung.com/aws-s3-multipart-upload](https://github.com/eugenp/tutorials/tree/master/aws)

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15
aws/pom.xml
View File

@ -24,6 +24,8 @@
<assertj-core.version>3.8.0</assertj-core.version>
<dynamodblocal.version>1.11.86</dynamodblocal.version>
<dynamodblocal.repository.url>https://s3-us-west-2.amazonaws.com/dynamodb-local/release</dynamodblocal.repository.url>
<commons-codec-version>1.10.L001</commons-codec-version>
<jets3t-version>0.9.4.0006L</jets3t-version>
</properties>
<dependencies>
@ -97,6 +99,19 @@
<version>${dynamodblocal.version}</version>
<scope>test</scope>
</dependency>
<!-- JetS3t -->
<dependency>
<groupId>org.lucee</groupId>
<artifactId>jets3t</artifactId>
<version>${jets3t-version}</version>
</dependency>
<dependency>
<groupId>org.lucee</groupId>
<artifactId>commons-codec</artifactId>
<version>${commons-codec-version}</version>
</dependency>
</dependencies>
<build>

1
aws/src/test/java/com/baeldung/dynamodb/ProductInfoRepositoryIntegrationTest.java
View File

@ -17,7 +17,6 @@ import org.junit.Test;
import java.io.IOException;
import java.io.InputStream;
import java.net.URISyntaxException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

351
aws/src/test/java/com/baeldung/jets3t/JetS3tLiveTest.java Normal file
View File

@ -0,0 +1,351 @@
package com.baeldung.jets3t;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jets3t.service.S3Service;
import org.jets3t.service.ServiceException;
import org.jets3t.service.impl.rest.httpclient.RestS3Service;
import org.jets3t.service.model.S3Bucket;
import org.jets3t.service.model.S3Object;
import org.jets3t.service.model.StorageObject;
import org.jets3t.service.security.AWSCredentials;
import org.junit.BeforeClass;
import org.junit.Test;
import java.io.*;
import java.nio.file.Files;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.stream.Collectors;
import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
import static junit.framework.TestCase.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
public class JetS3tLiveTest {
private Log log = LogFactory.getLog(JetS3tLiveTest.class);
private static final String BucketName = "baeldung-barfoo";
private static final String TestString = "test string";
private static final String TestStringName = "string object";
private static final String TgtBucket = "baeldung-tgtbucket";
private static S3Service s3Service;
@BeforeClass
public static void connectS3() throws Exception {
// Replace with your keys
String awsAccessKey = "your access key";
String awsSecretKey = "your secret key";
// Create credentials
AWSCredentials awsCredentials = new AWSCredentials(awsAccessKey, awsSecretKey);
// Create service
s3Service = new RestS3Service(awsCredentials);
}
@Test
public void givenCreate_AndDeleteBucket_CountGoesUpThenDown() throws Exception {
// List buckets, get a count
S3Bucket[] myBuckets = s3Service.listAllBuckets();
int count = Arrays.stream(myBuckets).map(S3Bucket::getName).collect(Collectors.toList()).size();
// Create a bucket
S3Bucket bucket = createBucket();
assertNotNull(bucket);
// List again
myBuckets = s3Service.listAllBuckets();
int newCount = Arrays.stream(myBuckets).map(S3Bucket::getName).collect(Collectors.toList()).size();
// We should have one more
assertEquals((count + 1), newCount);
// Delete so next test doesn't fail
deleteBucket();
// Check the count again, just for laughs
myBuckets = s3Service.listAllBuckets();
newCount = Arrays.stream(myBuckets).map(S3Bucket::getName).collect(Collectors.toList()).size();
assertEquals(count, newCount);
}
private S3Bucket createBucket() throws Exception {
S3Bucket bucket = s3Service.createBucket(BucketName);
log.info(bucket);
return bucket;
}
private void deleteBucket() throws ServiceException {
s3Service.deleteBucket(BucketName);
}
@Test
public void givenString_Uploaded_StringInfoIsAvailable() throws Exception {
// Create a bucket
S3Bucket bucket = createBucket();
assertNotNull(bucket);
// Upload a string
uploadStringData();
// Get the details
StorageObject objectDetailsOnly = s3Service.getObjectDetails(BucketName, TestStringName);
log.info("Content type: " + objectDetailsOnly.getContentType() + " length: " + objectDetailsOnly.getContentLength());
// Delete it
deleteObject(TestStringName);
// For next test
deleteBucket();
}
private void uploadStringData() throws Exception {
S3Object stringObject = new S3Object(TestStringName, TestString);
s3Service.putObject(BucketName, stringObject);
log.info("Content type:" + stringObject.getContentType());
}
private void deleteObject(String objectName) throws ServiceException {
s3Service.deleteObject(BucketName, objectName);
}
@Test
public void givenStringUploaded_StringIsDownloaded() throws Exception {
// Get a bucket
S3Bucket bucket = createBucket();
assertNotNull(bucket);
uploadStringData();
// Download
S3Object stringObject = s3Service.getObject(BucketName, TestStringName);
// Process stream into a string
String downloadedString = new BufferedReader(new InputStreamReader(stringObject.getDataInputStream())).lines().collect(Collectors.joining("\n"));
// Verify
assertTrue(TestString.equals(downloadedString));
// Clean up for next test
deleteObject(TestStringName);
deleteBucket();
}
@Test
public void givenBinaryFileUploaded_FileIsDownloaded() throws Exception {
// get a bucket
S3Bucket bucket = createBucket();
assertNotNull(bucket);
// Put a binary file
S3Object fileObject = new S3Object(new File("src/test/resources/test.jpg"));
s3Service.putObject(BucketName, fileObject);
// Print info about type and name
log.info("Content type:" + fileObject.getContentType());
log.info("File object name is " + fileObject.getName());
// Download
S3Object newFileObject = s3Service.getObject(BucketName, "test.jpg");
// Save to a different name
File newFile = new File("src/test/resources/newtest.jpg");
Files.copy(newFileObject.getDataInputStream(), newFile.toPath(), REPLACE_EXISTING);
// Get hashes and compare
String origMD5 = getFileMD5("src/test/resources/test.jpg");
String newMD5 = getFileMD5("src/test/resources/newtest.jpg");
assertTrue(origMD5.equals(newMD5));
// Clean up
deleteObject("test.jpg");
deleteBucket();
}
// Get MD5 hash for a file
private String getFileMD5(String filename) throws IOException {
try (FileInputStream fis = new FileInputStream(new File(filename))) {
return DigestUtils.md5Hex(fis);
}
}
@Test
public void givenStreamDataUploaded_StreamDataIsDownloaded() throws Exception {
// get a bucket
S3Bucket bucket = createBucket();
assertNotNull(bucket);
ArrayList<Integer> numbers = new ArrayList<>();
numbers.add(2);
numbers.add(3);
numbers.add(5);
numbers.add(7);
// Serialize ArrayList
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
ObjectOutputStream objectOutputStream = new ObjectOutputStream(bytes);
objectOutputStream.writeObject(numbers);
// Wrap bytes
ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes.toByteArray());
// Create and populate object
S3Object streamObject = new S3Object("stream");
streamObject.setDataInputStream(byteArrayInputStream);
streamObject.setContentLength(byteArrayInputStream.available());
streamObject.setContentType("binary/octet-stream");
// Put it
s3Service.putObject(BucketName, streamObject);
// Get it
S3Object newStreamObject = s3Service.getObject(BucketName, "stream");
// Convert back to ArrayList
ObjectInputStream objectInputStream = new ObjectInputStream(newStreamObject.getDataInputStream());
ArrayList<Integer> newNumbers = (ArrayList<Integer>)objectInputStream.readObject();
assertEquals(2, (int)newNumbers.get(0));
assertEquals(3, (int)newNumbers.get(1));
assertEquals(5, (int)newNumbers.get(2));
assertEquals(7, (int)newNumbers.get(3));
// Clean up
deleteObject("stream");
deleteBucket();
}
@Test
public void whenFileCopied_CopyIsSame() throws Exception {
// get a bucket
S3Bucket bucket = createBucket();
assertNotNull(bucket);
// Put a binary file
S3Object fileObject = new S3Object(new File("src/test/resources/test.jpg"));
s3Service.putObject(BucketName, fileObject);
// Copy it
S3Object targetObject = new S3Object("testcopy.jpg");
s3Service.copyObject(BucketName, "test.jpg", BucketName, targetObject, false);
// Download
S3Object newFileObject = s3Service.getObject(BucketName, "testcopy.jpg");
// Save to a different name
File newFile = new File("src/test/resources/testcopy.jpg");
Files.copy(newFileObject.getDataInputStream(), newFile.toPath(), REPLACE_EXISTING);
// Get hashes and compare
String origMD5 = getFileMD5("src/test/resources/test.jpg");
String newMD5 = getFileMD5("src/test/resources/testcopy.jpg");
assertTrue(origMD5.equals(newMD5));
// Clean up
deleteObject("test.jpg");
deleteObject("testcopy.jpg");
deleteBucket();
}
@Test
public void whenFileRenamed_NewNameIsSame() throws Exception {
// get a bucket
S3Bucket bucket = createBucket();
assertNotNull(bucket);
// Put a binary file
S3Object fileObject = new S3Object(new File("src/test/resources/test.jpg"));
s3Service.putObject(BucketName, fileObject);
// Copy it
s3Service.renameObject(BucketName, "test.jpg", new S3Object("spidey.jpg"));
// Download
S3Object newFileObject = s3Service.getObject(BucketName, "spidey.jpg");
// Save to a different name
File newFile = new File("src/test/resources/spidey.jpg");
Files.copy(newFileObject.getDataInputStream(), newFile.toPath(), REPLACE_EXISTING);
// Get hashes and compare
String origMD5 = getFileMD5("src/test/resources/test.jpg");
String newMD5 = getFileMD5("src/test/resources/spidey.jpg");
assertTrue(origMD5.equals(newMD5));
// Clean up
deleteObject("test.jpg");
deleteObject("spidey.jpg");
deleteBucket();
}
@Test
public void whenFileMoved_NewInstanceIsSame() throws Exception {
// get a bucket
S3Bucket bucket = createBucket();
assertNotNull(bucket);
// create another bucket
S3Bucket tgtBucket = s3Service.createBucket(TgtBucket);
// Put a binary file
S3Object fileObject = new S3Object(new File("src/test/resources/test.jpg"));
s3Service.putObject(BucketName, fileObject);
// Copy it
s3Service.moveObject(BucketName, "test.jpg", TgtBucket,
new S3Object("spidey.jpg"), false);
// Download
S3Object newFileObject = s3Service.getObject(TgtBucket, "spidey.jpg");
// Save to a different name
File newFile = new File("src/test/resources/spidey.jpg");
Files.copy(newFileObject.getDataInputStream(), newFile.toPath(), REPLACE_EXISTING);
// Get hashes and compare
String origMD5 = getFileMD5("src/test/resources/test.jpg");
String newMD5 = getFileMD5("src/test/resources/spidey.jpg");
assertTrue(origMD5.equals(newMD5));
// Clean up
deleteBucket();
s3Service.deleteObject(TgtBucket, "spidey.jpg");
s3Service.deleteBucket(TgtBucket);
}
}

2
aws/src/test/java/com/baeldung/s3/MultipartUploadTest.java → aws/src/test/java/com/baeldung/s3/MultipartUploadLiveTest.java
View File

@ -20,7 +20,7 @@ import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
public class MultipartUploadTest {
public class MultipartUploadLiveTest {
private static final String BUCKET_NAME = "bucket_name";
private static final String KEY_NAME = "picture.jpg";

10
baeldung-pmd-rules.xml Normal file
View File

@ -0,0 +1,10 @@
<?xml version="1.0"?>
<ruleset name="Baeldung custom pmd rules" xmlns="http://pmd.sf.net/ruleset/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
<description>Baeldung custom PMD rules</description>
<rule name="UnitTestMustFollowNamingConventionRule" message="Test class name doesn't follow the naming convention" class="org.baeldung.pmd.UnitTestNamingConventionRule">
<description>Test does not follow Baeldung naming convention</description>
<priority>3</priority>
</rule>
</ruleset>

8
bootique/pom.xml
View File

@ -13,10 +13,10 @@
</properties>
<parent>
<groupId>io.bootique.parent</groupId>
<artifactId>bootique-parent</artifactId>
<version>0.12</version>
</parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencyManagement>
<dependencies>

143
camel-api/pom.xml
View File

@ -1,80 +1,79 @@
<?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">
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>
<groupId>com.example</groupId>
<artifactId>spring-boot-camel</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Spring-Boot - Camel API</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<dependencies>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-servlet-starter</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-jackson-starter</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-swagger-java-starter</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-spring-boot-starter</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>${spring-boot-starter.version}</version>
</dependency>
</dependencies>
<groupId>com.example</groupId>
<artifactId>spring-boot-camel</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<defaultGoal>spring-boot:run</defaultGoal>
<name>Spring-Boot - Camel API</name>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring-boot-starter.version}</version>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
<camel.version>2.19.1</camel.version>
<spring-boot-starter.version>1.5.4.RELEASE</spring-boot-starter.version>
</properties>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
<camel.version>2.19.1</camel.version>
<spring-boot-starter.version>1.5.4.RELEASE</spring-boot-starter.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-servlet-starter</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-jackson-starter</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-swagger-java-starter</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-spring-boot-starter</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>${spring-boot-starter.version}</version>
</dependency>
</dependencies>
<build>
<defaultGoal>spring-boot:run</defaultGoal>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring-boot-starter.version}</version>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

7
cas/cas-server/pom.xml
View File

@ -7,7 +7,12 @@
<artifactId>cas-server</artifactId>
<packaging>war</packaging>
<version>1.0</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.M7</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<build>
<plugins>
<plugin>

3
checker-plugin/README.md Normal file
View File

@ -0,0 +1,3 @@
### Relevant articles
- [The Checker Framework – Pluggable Type Systems for Java](http://www.baeldung.com/checker-framework)

5
checker-plugin/pom.xml
View File

@ -7,6 +7,11 @@
<version>1.0-SNAPSHOT</version>
<name>checker-plugin</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<!-- https://checkerframework.org/manual/#maven -->

2
core-groovy/README.md
View File

@ -2,3 +2,5 @@
## Relevant articles:
- [JDBC with Groovy](http://www.baeldung.com/jdbc-groovy)
- [Working with JSON in Groovy](http://www.baeldung.com/groovy-json)

8
core-groovy/src/test/groovy/com/baeldung/json/JsonParserTest.groovy
View File

@ -24,7 +24,7 @@ class JsonParserTest extends Specification {
account.value == 15.6
}
def 'Should parse to Account given Json String with date property' () {
/*def 'Should parse to Account given Json String with date property' () {
given:
def json = '{"id":"1234","value":15.6,"createdAt":"2018-01-01T00:00:00+0000"}'
when:
@ -36,9 +36,9 @@ class JsonParserTest extends Specification {
account.value == 15.6
println account.createdAt
account.createdAt == Date.parse('yyyy-MM-dd', '2018-01-01')
}
}*/
def 'Should parse to Json given an Account object' () {
/*def 'Should parse to Json given an Account object' () {
given:
Account account = new Account(
id: '123',
@ -50,7 +50,7 @@ class JsonParserTest extends Specification {
then:
json
json == '{"value":15.6,"createdAt":"2018-01-01T00:00:00+0000","id":"123"}'
}
}*/
def 'Should prettify given a json string' () {
given:

1
core-java-8/README.md
View File

@ -43,3 +43,4 @@
- [Shuffling Collections In Java](http://www.baeldung.com/java-shuffle-collection)
- [Java 8 StringJoiner](http://www.baeldung.com/java-string-joiner)
- [Introduction to Spliterator in Java](http://www.baeldung.com/java-spliterator)
- [Java 8 Math New Methods](http://www.baeldung.com/java-8-math)

1
core-java-8/pom.xml
View File

@ -8,7 +8,6 @@
<name>core-java-8</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>

31
core-java-8/src/main/java/com/baeldung/java_8_features/Car.java Normal file
View File

@ -0,0 +1,31 @@
package com.baeldung.java_8_features;
public class Car {
private String model;
private int topSpeed;
public Car(String model, int topSpeed) {
super();
this.model = model;
this.topSpeed = topSpeed;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
public int getTopSpeed() {
return topSpeed;
}
public void setTopSpeed(int topSpeed) {
this.topSpeed = topSpeed;
}
}

27
core-java-8/src/test/java/com/baeldung/java8/Java8MaxMinUnitTest.java
View File

@ -1,6 +1,8 @@
package com.baeldung.java8;
import com.baeldung.java_8_features.Car;
import com.baeldung.java_8_features.Person;
import org.junit.Test;
import java.util.Arrays;
@ -44,4 +46,29 @@ public class Java8MaxMinUnitTest {
assertEquals("Should be Alex", alex, minByAge);
}
@Test
public void whenArrayIsOfIntegerThenMinUsesIntegerComparator() {
int[] integers = new int[] { 20, 98, 12, 7, 35 };
int min = Arrays.stream(integers)
.min()
.getAsInt();
assertEquals(7, min);
}
@Test
public void whenArrayIsOfCustomTypeThenMaxUsesCustomComparator() {
final Car porsche = new Car("Porsche 959", 319);
final Car ferrari = new Car("Ferrari 288 GTO", 303);
final Car bugatti = new Car("Bugatti Veyron 16.4 Super Sport", 415);
final Car mcLaren = new Car("McLaren F1", 355);
final Car[] fastCars = { porsche, ferrari, bugatti, mcLaren };
final Car maxBySpeed = Arrays.stream(fastCars)
.max(Comparator.comparing(Car::getTopSpeed))
.orElseThrow(NoSuchElementException::new);
assertEquals(bugatti, maxBySpeed);
}
}

76
core-java-8/src/test/java/com/baeldung/time/ElapsedTimeUnitTest.java Normal file
View File

@ -0,0 +1,76 @@
package com.baeldung.time;
import static org.junit.Assert.assertEquals;
import java.time.Duration;
import java.time.Instant;
import java.util.concurrent.TimeUnit;
import org.apache.commons.lang3.time.StopWatch;
import org.junit.Test;
public class ElapsedTimeUnitTest {
@Test
public void givenRunningTask_whenMeasuringTimeWithCurrentTimeMillis_thenGetElapsedTime() throws InterruptedException {
long start = System.currentTimeMillis();
simulateRunningTask();
long finish = System.currentTimeMillis();
long timeElapsed = finish - start;
assertEquals(true, (2000L <= timeElapsed) && (timeElapsed <= 3000L));
}
@Test
public void giveRunningTask_whenMeasuringTimeWithNanoTime_thenGetElapsedTime() throws InterruptedException {
long start = System.nanoTime();
simulateRunningTask();
long finish = System.nanoTime();
long timeElapsed = finish - start;
assertEquals(true, (2000000000L <= timeElapsed) && (timeElapsed <= 3000000000L));
}
@Test
public void givenRunningTask_whenMeasuringTimeWithStopWatch_thenGetElapsedTime() throws InterruptedException {
StopWatch watch = new StopWatch();
watch.start();
simulateRunningTask();
watch.stop();
long timeElapsed = watch.getTime();
assertEquals(true, (2000L <= timeElapsed) && (timeElapsed <= 3000L));
}
@Test
public void givenRunningTask_whenMeasuringTimeWithInstantClass_thenGetElapsedTime() throws InterruptedException {
Instant start = Instant.now();
simulateRunningTask();
Instant finish = Instant.now();
long timeElapsed = Duration.between(start, finish).toMillis();
assertEquals(true, (2000L <= timeElapsed) && (timeElapsed <= 3000L));
}
/**
* Simulate task running for 2.5 seconds.
*
* @throws InterruptedException
*/
private static void simulateRunningTask() throws InterruptedException {
TimeUnit.MILLISECONDS.sleep(2500); // 2.5 seconds
}
}

2
core-java-9/README.md
View File

@ -20,3 +20,5 @@
- [Compact Strings in Java 9](http://www.baeldung.com/java-9-compact-string)
- [Convert Date to LocalDate or LocalDateTime and Back](http://www.baeldung.com/java-date-to-localdate-and-localdatetime)
- [Java 9 Variable Handles Demistyfied](http://www.baeldung.com/java-variable-handles)
- [Exploring the New HTTP Client in Java 9](http://www.baeldung.com/java-9-http-client)
- [Method Handles in Java](http://www.baeldung.com/java-method-handles)

0
core-java-9/compile-modules.sh Normal file → Executable file
View File

2
core-java-9/compile-simple-modules.sh Executable file
View File

@ -0,0 +1,2 @@
#!/usr/bin/env bash
javac -d outDir --module-source-path src/simple-modules $(find src/simple-modules -name "*.java")

6
core-java-9/pom.xml
View File

@ -6,7 +6,11 @@
<version>0.2-SNAPSHOT</version>
<name>core-java-9</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<pluginRepositories>
<pluginRepository>
<id>apache.snapshots</id>

2
core-java-9/run-simple-module-app.sh Executable file
View File

@ -0,0 +1,2 @@
#!/usr/bin/env bash
java --module-path outDir -m main.app/com.baeldung.modules.main.MainApp

0
core-java-9/run-student-client.sh Normal file → Executable file
View File

5
core-java-9/src/simple-modules/hello.modules/com/baeldung/modules/hello/HelloInterface.java Normal file
View File

@ -0,0 +1,5 @@
package com.baeldung.modules.hello;
public interface HelloInterface {
public void sayHello();
}

11
core-java-9/src/simple-modules/hello.modules/com/baeldung/modules/hello/HelloModules.java Normal file
View File

@ -0,0 +1,11 @@
package com.baeldung.modules.hello;
public class HelloModules implements HelloInterface {
public static void doSomething() {
System.out.println("Hello, Modules!");
}
public void sayHello() {
System.out.println("Hello!");
}
}

4
core-java-9/src/simple-modules/hello.modules/module-info.java Normal file
View File

@ -0,0 +1,4 @@
module hello.modules {
exports com.baeldung.modules.hello;
provides com.baeldung.modules.hello.HelloInterface with com.baeldung.modules.hello.HelloModules;
}

12
core-java-9/src/simple-modules/main.app/com/baeldung/modules/main/MainApp.java Normal file
View File

@ -0,0 +1,12 @@
package com.baeldung.modules.main;
import com.baeldung.modules.hello.HelloModules;
public class MainApp {
public static void main(String[] args) {
HelloModules.doSomething();
HelloModules module = new HelloModules();
module.sayHello();
}
}

4
core-java-9/src/simple-modules/main.app/module-info.java Normal file
View File

@ -0,0 +1,4 @@
module main.app {
requires hello.modules;
uses com.baeldung.modules.hello.HelloInterface;
}

4
core-java-concurrency/README.md
View File

@ -34,3 +34,7 @@
- [Implementing a Runnable vs Extending a Thread](http://www.baeldung.com/java-runnable-vs-extending-thread)
- [How to Kill a Java Thread](http://www.baeldung.com/java-thread-stop)
- [ExecutorService - Waiting for Threads to Finish](http://www.baeldung.com/java-executor-wait-for-threads)
- [wait and notify() Methods in Java](http://www.baeldung.com/java-wait-notify)
- [Priority-based Job Scheduling in Java](http://www.baeldung.com/java-priority-job-schedule)
- [A Custom Spring SecurityConfigurer](http://www.baeldung.com/spring-security-custom-configurer)
- [Life Cycle of a Thread in Java](http://www.baeldung.com/java-thread-lifecycle)

50
core-java-concurrency/src/test/java/com/baeldung/concurrent/volatilekeyword/SharedObjectManualTest.java
View File

@ -1,55 +1,36 @@
package com.baeldung.concurrent.volatilekeyword;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import static junit.framework.Assert.assertEquals;
import static org.junit.Assert.*;
public class SharedObjectManualTest {
private SharedObject sharedObject;
private int valueReadByThread2;
private int valueReadByThread3;
@Before
public void setUp() {
sharedObject = new SharedObject();
}
@Test
public void whenOneThreadWrites_thenVolatileReadsFromMainMemory() throws InterruptedException {
SharedObject sharedObject = new SharedObject();
Thread writer = new Thread(() -> sharedObject.increamentCount());
writer.start();
Thread.sleep(100);
Thread readerOne = new Thread(() -> {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
valueReadByThread2 = sharedObject.getCount();
int valueReadByThread2 = sharedObject.getCount();
assertEquals(1, valueReadByThread2);
});
readerOne.start();
Thread readerTwo = new Thread(() -> {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
valueReadByThread3 = sharedObject.getCount();
int valueReadByThread3 = sharedObject.getCount();
assertEquals(1, valueReadByThread3);
});
readerTwo.start();
assertEquals(1, valueReadByThread2);
assertEquals(1, valueReadByThread3);
}
@Test
public void whenTwoThreadWrites_thenVolatileReadsFromMainMemory() throws InterruptedException {
SharedObject sharedObject = new SharedObject();
Thread writerOne = new Thread(() -> sharedObject.increamentCount());
writerOne.start();
Thread.sleep(100);
@ -58,14 +39,17 @@ public class SharedObjectManualTest {
writerTwo.start();
Thread.sleep(100);
Thread readerOne = new Thread(() -> valueReadByThread2 = sharedObject.getCount());
Thread readerOne = new Thread(() -> {
int valueReadByThread2 = sharedObject.getCount();
assertEquals(2, valueReadByThread2);
});
readerOne.start();
Thread readerTwo = new Thread(() -> valueReadByThread3 = sharedObject.getCount());
Thread readerTwo = new Thread(() -> {
int valueReadByThread3 = sharedObject.getCount();
assertEquals(2, valueReadByThread3);
});
readerTwo.start();
assertEquals(2, valueReadByThread2);
assertEquals(2, valueReadByThread3);
}
}

6
core-java-io/pom.xml
View File

@ -6,7 +6,11 @@
<packaging>jar</packaging>
<name>core-java-io</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<!-- utils -->

6
core-java-sun/pom.xml
View File

@ -6,7 +6,11 @@
<packaging>jar</packaging>
<name>core-java-sun</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<!-- utils -->

1
core-java/.gitignore vendored
View File

@ -16,7 +16,6 @@
*.ear
# Files generated by integration tests
*.txt
backup-pom.xml
/bin/
/temp

11
core-java/README.md
View File

@ -141,5 +141,14 @@
- [Comparing Strings in Java](http://www.baeldung.com/java-compare-strings)
- [Guide to Inheritance in Java](http://www.baeldung.com/java-inheritance)
- [Guide to Externalizable Interface in Java](http://www.baeldung.com/java-externalizable)
- [The “final” Keyword in Java](http://www.baeldung.com/java-final)
- [The Observer Pattern in Java](https://github.com/eugenp/tutorials/tree/master/core-java)
- [Flyweight Pattern in Java](http://www.baeldung.com/java-flyweight)
- [Object Type Casting in Java](http://www.baeldung.com/java-type-casting)
- [A Practical Guide to DecimalFormat](http://www.baeldung.com/java-decimalformat)
- [How to Detect the OS Using Java](http://www.baeldung.com/java-detect-os)
- [How to TDD a List Implementation in Java](http://www.baeldung.com/java-test-driven-list)
- [ASCII Art in Java](http://www.baeldung.com/ascii-art-in-java)
- [An Advanced Tagging Implementation with JPA](http://www.baeldung.com/jpa-tagging-advanced)
- [Handling Daylight Savings Time in Java](http://www.baeldung.com/java-daylight-savings)
- [Inheritance and Composition (Is-a vs Has-a relationship) in Java](http://www.baeldung.com/java-inheritance-composition)

13
core-java/pom.xml
View File

@ -7,7 +7,11 @@
<packaging>jar</packaging>
<name>core-java</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<!-- utils -->
@ -227,10 +231,9 @@
<version>1.5.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>2.4.0</version>
<scope>runtime</scope>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.197</version>
</dependency>
</dependencies>

27
core-java/src/main/java/com/baeldung/inheritancecomposition/application/Application.java Normal file
View File

@ -0,0 +1,27 @@
package com.baeldung.inheritancecomposition.application;
import com.baeldung.inheritancecomposition.model.Actress;
import com.baeldung.inheritancecomposition.model.Computer;
import com.baeldung.inheritancecomposition.model.StandardMemory;
import com.baeldung.inheritancecomposition.model.Person;
import com.baeldung.inheritancecomposition.model.StandardProcessor;
import com.baeldung.inheritancecomposition.model.StandardSoundCard;
import com.baeldung.inheritancecomposition.model.Waitress;
public class Application {
public static void main(String[] args) {
Person person = new Person("John", "john@domain.com", 35);
Waitress waitress = new Waitress("Mary", "mary@domain.com", 22);
System.out.println(waitress.serveStarter("mixed salad"));
System.out.println(waitress.serveMainCourse("steak"));
System.out.println(waitress.serveDessert("cup of cofee"));
Actress actress = new Actress("Susan", "susan@domain.com", 30);
System.out.println(actress.readScript("Psycho"));
System.out.println(actress.performRole());
Computer computer = new Computer(new StandardProcessor("Intel I3"), new StandardMemory("Kingston", "1TB"));
computer.setSoundCard(new StandardSoundCard("Generic Sound Card"));
System.out.println(computer);
}
}

16
core-java/src/main/java/com/baeldung/inheritancecomposition/model/Actress.java Normal file
View File

@ -0,0 +1,16 @@
package com.baeldung.inheritancecomposition.model;
public class Actress extends Person {
public Actress(String name, String email, int age) {
super(name, email, age);
}
public String readScript(String movie) {
return "Reading the script of " + movie;
}
public String performRole() {
return "Performing a role";
}
}

36
core-java/src/main/java/com/baeldung/inheritancecomposition/model/Computer.java Normal file
View File

@ -0,0 +1,36 @@
package com.baeldung.inheritancecomposition.model;
import java.util.Optional;
public class Computer {
private Processor processor;
private Memory memory;
private SoundCard soundCard;
public Computer(Processor processor, Memory memory) {
this.processor = processor;
this.memory = memory;
}
public void setSoundCard(SoundCard soundCard) {
this.soundCard = soundCard;
}
public Processor getProcessor() {
return processor;
}
public Memory getMemory() {
return memory;
}
public Optional<SoundCard> getSoundCard() {
return Optional.ofNullable(soundCard);
}
@Override
public String toString() {
return "Computer{" + "processor=" + processor + ", memory=" + memory + ", soundcard=" + soundCard +"}";
}
}

8
core-java/src/main/java/com/baeldung/inheritancecomposition/model/Memory.java Normal file
View File

@ -0,0 +1,8 @@
package com.baeldung.inheritancecomposition.model;
public interface Memory {
String getBrand();
String getSize();
}

31
core-java/src/main/java/com/baeldung/inheritancecomposition/model/Person.java Normal file
View File

@ -0,0 +1,31 @@
package com.baeldung.inheritancecomposition.model;
public class Person {
private final String name;
private final String email;
private final int age;
public Person(String name, String email, int age) {
this.name = name;
this.email = email;
this.age = age;
}
public String getName() {
return name;
}
public String getEmail() {
return email;
}
public int getAge() {
return age;
}
@Override
public String toString() {
return "Person{" + "name=" + name + ", email=" + email + ", age=" + age + "}";
}
}

6
core-java/src/main/java/com/baeldung/inheritancecomposition/model/Processor.java Normal file
View File

@ -0,0 +1,6 @@
package com.baeldung.inheritancecomposition.model;
public interface Processor {
String getModel();
}

6
core-java/src/main/java/com/baeldung/inheritancecomposition/model/SoundCard.java Normal file
View File

@ -0,0 +1,6 @@
package com.baeldung.inheritancecomposition.model;
public interface SoundCard {
String getBrand();
}

25
core-java/src/main/java/com/baeldung/inheritancecomposition/model/StandardMemory.java Normal file
View File

@ -0,0 +1,25 @@
package com.baeldung.inheritancecomposition.model;
public class StandardMemory implements Memory {
private String brand;
private String size;
public StandardMemory(String brand, String size) {
this.brand = brand;
this.size = size;
}
public String getBrand() {
return brand;
}
public String getSize() {
return size;
}
@Override
public String toString() {
return "Memory{" + "brand=" + brand + ", size=" + size + "}";
}
}

20
core-java/src/main/java/com/baeldung/inheritancecomposition/model/StandardProcessor.java Normal file
View File

@ -0,0 +1,20 @@
package com.baeldung.inheritancecomposition.model;
public class StandardProcessor implements Processor {
private String model;
public StandardProcessor(String model) {
this.model = model;
}
@Override
public String getModel() {
return model;
}
@Override
public String toString() {
return "Processor{" + "model=" + model + "}";
}
}

20
core-java/src/main/java/com/baeldung/inheritancecomposition/model/StandardSoundCard.java Normal file
View File

@ -0,0 +1,20 @@
package com.baeldung.inheritancecomposition.model;
public class StandardSoundCard implements SoundCard {
private String brand;
public StandardSoundCard(String brand) {
this.brand = brand;
}
@Override
public String getBrand() {
return brand;
}
@Override
public String toString() {
return "SoundCard{" + "brand=" + brand + "}";
}
}

20
core-java/src/main/java/com/baeldung/inheritancecomposition/model/Waitress.java Normal file
View File

@ -0,0 +1,20 @@
package com.baeldung.inheritancecomposition.model;
public class Waitress extends Person {
public Waitress(String name, String email, int age) {
super(name, email, age);
}
public String serveStarter(String starter) {
return "Serving a " + starter;
}
public String serveMainCourse(String mainCourse) {
return "Serving a " + mainCourse;
}
public String serveDessert(String dessert) {
return "Serving a " + dessert;
}
}

4
core-java/src/main/java/com/baeldung/jdbc/BatchProcessing.java
View File

@ -13,8 +13,8 @@ public class BatchProcessing {
public void getConnection(){
try {
Class.forName("org.hsqldb.jdbcDriver");
connection = DriverManager.getConnection("jdbc:hsqldb:file:C:\\EMPLOYEEDB", "SA", "");
Class.forName("org.h2.Driver");
connection = DriverManager.getConnection("jdbc:h2:mem:db", "SA", "");
connection.setAutoCommit(false);
} catch (Exception e) {
e.printStackTrace(System.out);

54
core-java/src/main/java/com/baeldung/ssl/SecureConnection.java Normal file
View File

@ -0,0 +1,54 @@
package com.baeldung.ssl;
import java.io.InputStream;
import java.io.OutputStream;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
public class SecureConnection {
public static void main(String[] args) {
if (args.length != 2) {
System.out.println("Use: SecureConnection host port");
System.exit(1);
}
try {
String host = getHost(args);
Integer port = getPort(args);
SSLSocketFactory sslsocketfactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
SSLSocket sslsocket = (SSLSocket) sslsocketfactory.createSocket(host, port);
InputStream in = sslsocket.getInputStream();
OutputStream out = sslsocket.getOutputStream();
out.write(1);
while (in.available() > 0) {
System.out.print(in.read());
}
System.out.println("Secured connection performed successfully");
} catch (Exception exception) {
exception.printStackTrace();
}
}
/**
* Get the host from arguments
* @param args the arguments
* @return the host
*/
private static String getHost(String[] args) {
return args[0];
}
/**
* Get the port from arguments
* @param args the arguments
* @return the port
*/
private static Integer getPort(String[] args) {
return Integer.parseInt(args[1]);
}
}

17
core-java/src/main/java/com/baeldung/system/ChatWindow.java Normal file
View File

@ -0,0 +1,17 @@
package com.baeldung.system;
import java.awt.event.WindowEvent;
/**
* Note: This class is not meant for unit-testing since it uses system
* features at low level and that it uses 'System' gc() which suggests
* JVM for garbage collection. But the usage below demonstrates how the
* method can be used.
*/
public class ChatWindow {
public void windowStateChanged(WindowEvent event) {
if (event.getNewState() == WindowEvent.WINDOW_DEACTIVATED ) {
System.gc(); // if it ends up running, great!
}
}
}

16
core-java/src/main/java/com/baeldung/system/DateTimeService.java Normal file
View File

@ -0,0 +1,16 @@
package com.baeldung.system;
import java.util.Date;
public class DateTimeService {
// One hour from now
public long nowPlusOneHour() {
return System.currentTimeMillis() + 3600 * 1000L;
}
// Human-readable format
public String nowPrettyPrinted() {
return new Date(System.currentTimeMillis()).toString();
}
}

7
core-java/src/main/java/com/baeldung/system/EnvironmentVariables.java Normal file
View File

@ -0,0 +1,7 @@
package com.baeldung.system;
public class EnvironmentVariables {
public String getPath() {
return System.getenv("PATH");
}
}

18
core-java/src/main/java/com/baeldung/system/SystemErrDemo.java Normal file
View File

@ -0,0 +1,18 @@
package com.baeldung.system;
/**
* Note: This class is not meant for unit-testing since it uses system
* features at low level and that it uses 'System' standard error stream
* methods to show output on screen. Also unit-tests in CI environments
* don't have console output for user to see messages. But the usage below
* demonstrates how the methods can be used.
*/
public class SystemErrDemo {
public static void main(String[] args) {
// Print without 'hitting' return
System.err.print("some inline error message");
// Print and then 'hit' return
System.err.println("an error message having new line at the end");
}
}

24
core-java/src/main/java/com/baeldung/system/SystemExitDemo.java Normal file
View File

@ -0,0 +1,24 @@
package com.baeldung.system;
/**
* Note: This class is not meant for unit-testing since it uses system
* features at low level and that it uses 'System' exit() which will
* exit the JVM. Also unit-tests in CI environments are not meant to
* exit unit tests like that. But the usage below demonstrates how the
* method can be used.
*/
public class SystemExitDemo {
public static void main(String[] args) {
boolean error = false;
// do something and set error value
if (error) {
System.exit(1); // error case exit
} else {
System.exit(0); // normal case exit
}
// Will not do anything after exit()
}
}

25
core-java/src/main/java/com/baeldung/system/SystemOutDemo.java Normal file
View File

@ -0,0 +1,25 @@
package com.baeldung.system;
import java.io.FileNotFoundException;
import java.io.PrintStream;
/**
* Note: This class is not meant for unit-testing since it uses system
* features at low level and that it uses 'System' standard output stream
* methods to show output on screen. Also unit-tests in CI environments
* don't have console output for user to see messages. But the usage below
* demonstrates how the methods can be used.
*/
public class SystemOutDemo {
public static void main(String[] args) throws FileNotFoundException {
// Print without 'hitting' return
System.out.print("some inline message");
// Print and then 'hit' return
System.out.println("a message having new line at the end");
// Changes output stream to send messages to file.
System.setOut(new PrintStream("file.txt"));
}
}

35
core-java/src/main/java/com/baeldung/system/UserCredentials.java Normal file
View File

@ -0,0 +1,35 @@
package com.baeldung.system;
import java.io.BufferedReader;
import java.io.Console;
import java.io.IOException;
import java.io.InputStreamReader;
/**
* Note: This class is not meant for unit-testing since it uses system
* features at low level and that it uses 'System' standard input stream
* methods to read text from user. Also unit-tests in CI environments
* don't have console input for user to type in text. But the usage below
* demonstrates how the methods can be used.
*/
public class UserCredentials {
public String readUsername(int length) throws IOException {
byte[] name = new byte[length];
System.in.read(name, 0, length); // by default, from the console
return new String(name);
}
public String readUsername() throws IOException {
BufferedReader reader =
new BufferedReader(new InputStreamReader(System.in));
return reader.readLine();
}
public String readUsernameWithPrompt() {
Console console = System.console();
return console == null ? null : // Console not available
console.readLine("%s", "Enter your name: ");
}
}

1
core-java/src/main/resources/file.txt Normal file
View File

@ -0,0 +1 @@
baeldung.com

116
core-java/src/test/java/com/baeldung/array/converter/ArrayConvertToListTest.java Normal file
View File

@ -0,0 +1,116 @@
package com.baeldung.array.converter;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static org.junit.Assert.*;
public class ArrayConvertToListTest {
@Test
public void givenAnStringArray_whenConvertArrayToList_thenListCreated() {
String[] flowers = { "Ageratum", "Allium", "Poppy", "Catmint" };
List<String> flowerList = Arrays.asList(flowers);
assertNotNull(flowerList);
assertEquals(flowerList.size(), 4);
assertEquals(flowerList.get(0), "Ageratum");
assertEquals(flowerList.get(1), "Allium");
assertEquals(flowerList.get(2), "Poppy");
assertEquals(flowerList.get(3), "Catmint");
}
@Test
public void givenAnIntArray_whenConvertArrayToList_thenListWithOneElementCreated() {
int[] primitives = { 1, 2, 3, 4 };
List numbers = Arrays.asList(primitives);
assertNotNull(numbers);
assertEquals(numbers.size(), 1);
assertEquals(numbers.get(0), primitives);
}
@Test(expected = UnsupportedOperationException.class)
public void givenAnStringArray_whenConvertArrayToListAndAddAnElement_thenThrowUnsupportedOperationException() {
String[] flowers = { "Ageratum", "Allium", "Poppy", "Catmint" };
List<String> flowerList = Arrays.asList(flowers);
assertNotNull(flowerList);
assertEquals(flowerList.size(), 4);
assertEquals(flowerList.get(0), "Ageratum");
assertEquals(flowerList.get(1), "Allium");
assertEquals(flowerList.get(2), "Poppy");
assertEquals(flowerList.get(3), "Catmint");
flowerList.add("Celosia");
}
@Test(expected = UnsupportedOperationException.class)
public void givenAnStringArray_whenConvertArrayToListAndRemoveAnElement_thenThrowUnsupportedOperationException() {
String[] flowers = { "Ageratum", "Allium", "Poppy", "Catmint" };
List<String> flowerList = Arrays.asList(flowers);
assertNotNull(flowerList);
assertEquals(flowerList.size(), 4);
assertEquals(flowerList.get(0), "Ageratum");
assertEquals(flowerList.get(1), "Allium");
assertEquals(flowerList.get(2), "Poppy");
assertEquals(flowerList.get(3), "Catmint");
flowerList.remove("Poppy");
}
@Test
public void givenAnStringArray_whenCreateListFromArrayAndAddAnElement_thenListOk() {
String[] flowers = { "Ageratum", "Allium", "Poppy", "Catmint" };
List<String> flowerList = Arrays.asList(flowers);
assertNotNull(flowerList);
assertEquals(flowerList.size(), 4);
assertEquals(flowerList.get(0), "Ageratum");
assertEquals(flowerList.get(1), "Allium");
assertEquals(flowerList.get(2), "Poppy");
assertEquals(flowerList.get(3), "Catmint");
List<String> newflowerList = new ArrayList<>(flowerList);
assertNotNull(newflowerList);
assertEquals(newflowerList.size(), 4);
assertEquals(newflowerList.get(0), "Ageratum");
assertEquals(newflowerList.get(1), "Allium");
assertEquals(newflowerList.get(2), "Poppy");
assertEquals(newflowerList.get(3), "Catmint");
newflowerList.add("Celosia");
assertEquals(newflowerList.size(), 5);
assertEquals(newflowerList.get(4), "Celosia");
}
@Test
public void givenAnStringArray_whenIterateArrayAndAddTheElementsToNewListAndAddAnElement_thenListOk() {
String[] flowers = { "Ageratum", "Allium", "Poppy", "Catmint" };
List<String> flowerList = new ArrayList<>();
for(String flower: flowers) {
flowerList.add(flower);
}
assertNotNull(flowerList);
assertEquals(flowerList.size(), 4);
assertEquals(flowerList.get(0), "Ageratum");
assertEquals(flowerList.get(1), "Allium");
assertEquals(flowerList.get(2), "Poppy");
assertEquals(flowerList.get(3), "Catmint");
flowerList.add("Celosia");
assertEquals(flowerList.size(), 5);
assertEquals(flowerList.get(4), "Celosia");
}
}

41
core-java/src/test/java/com/baeldung/inheritancecomposition/test/ActressUnitTest.java Normal file
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package com.baeldung.inheritancecomposition.test;
import com.baeldung.inheritancecomposition.model.Actress;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.assertj.core.api.Assertions.*;
public class ActressUnitTest {
private static Actress actress;
@BeforeClass
public static void setUpActressInstance() {
actress = new Actress("Susan", "susan@domain.com", 30);
}
@Test
public void givenActressInstance_whenCalledgetName_thenEqual() {
assertThat(actress.getName()).isEqualTo("Susan");
}
@Test
public void givenActressInstance_whenCalledgetEmail_thenEqual() {
assertThat(actress.getEmail()).isEqualTo("susan@domain.com");
}
@Test
public void givenActressInstance_whenCalledgetAge_thenEqual() {
assertThat(actress.getAge()).isEqualTo(30);
}
@Test
public void givenActressInstance_whenCalledreadScript_thenEqual() {
assertThat(actress.readScript("Psycho")).isEqualTo("Reading the script of Psycho");
}
@Test
public void givenActressInstance_whenCalledperfomRole_thenEqual() {
assertThat(actress.performRole()).isEqualTo("Performing a role");
}
}

24
core-java/src/test/java/com/baeldung/inheritancecomposition/test/CompositionUnitTest.java Normal file
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package com.baeldung.inheritancecomposition.test;
import com.baeldung.inheritancecomposition.model.Computer;
import com.baeldung.inheritancecomposition.model.Memory;
import com.baeldung.inheritancecomposition.model.Processor;
import com.baeldung.inheritancecomposition.model.StandardMemory;
import com.baeldung.inheritancecomposition.model.StandardProcessor;
import com.baeldung.inheritancecomposition.model.StandardSoundCard;
import java.util.Optional;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
public class CompositionUnitTest {
@Test
public void givenComputerInstance_whenExtractedEachField_thenThreeAssertions() {
Computer computer = new Computer(new StandardProcessor("Intel I3"), new StandardMemory("Kingston", "1TB"));
computer.setSoundCard(new StandardSoundCard("Generic Sound Card"));
assertThat(computer.getProcessor()).isInstanceOf(Processor.class);
assertThat(computer.getMemory()).isInstanceOf(Memory.class);
assertThat(computer.getSoundCard()).isInstanceOf(Optional.class);
}
}

20
core-java/src/test/java/com/baeldung/inheritancecomposition/test/InheritanceUnitTest.java Normal file
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package com.baeldung.inheritancecomposition.test;
import com.baeldung.inheritancecomposition.model.Actress;
import com.baeldung.inheritancecomposition.model.Person;
import com.baeldung.inheritancecomposition.model.Waitress;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
public class InheritanceUnitTest {
@Test
public void givenWaitressInstance_whenCheckedType_thenIsInstanceOfPerson() {
assertThat(new Waitress("Mary", "mary@domain.com", 22)).isInstanceOf(Person.class);
}
@Test
public void givenActressInstance_whenCheckedType_thenIsInstanceOfPerson() {
assertThat(new Actress("Susan", "susan@domain.com", 30)).isInstanceOf(Person.class);
}
}

31
core-java/src/test/java/com/baeldung/inheritancecomposition/test/PersonUnitTest.java Normal file
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package com.baeldung.inheritancecomposition.test;
import com.baeldung.inheritancecomposition.model.Person;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.assertj.core.api.Assertions.*;
public class PersonUnitTest {
private static Person person;
@BeforeClass
public static void setPersonInstance() {
person = new Person("John", "john@domain.com", 35);
}
@Test
public void givenPersonInstance_whenCalledgetName_thenEqual() {
assertThat(person.getName()).isEqualTo("John");
}
@Test
public void givenPersonInstance_whenCalledgetEmail_thenEqual() {
assertThat(person.getEmail()).isEqualTo("john@domain.com");
}
@Test
public void givenPersonInstance_whenCalledgetAge_thenEqual() {
assertThat(person.getAge()).isEqualTo(35);
}
}

46
core-java/src/test/java/com/baeldung/inheritancecomposition/test/WaitressUnitTest.java Normal file
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package com.baeldung.inheritancecomposition.test;
import com.baeldung.inheritancecomposition.model.Waitress;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.assertj.core.api.Assertions.*;
public class WaitressUnitTest {
private static Waitress waitress;
@BeforeClass
public static void setUpWaitressInstance() {
waitress = new Waitress("Mary", "mary@domain.com", 22);
}
@Test
public void givenWaitressInstance_whenCalledgetName_thenOneAssertion() {
assertThat(waitress.getName()).isEqualTo("Mary");
}
@Test
public void givenWaitressInstance_whenCalledgetEmail_thenOneAssertion() {
assertThat(waitress.getEmail()).isEqualTo("mary@domain.com");
}
@Test
public void givenWaitressInstance_whenCalledgetAge_thenOneAssertion() {
assertThat(waitress.getAge()).isEqualTo(22);
}
@Test
public void givenWaitressInstance_whenCalledserveStarter_thenOneAssertion() {
assertThat(waitress.serveStarter("mixed salad")).isEqualTo("Serving a mixed salad");
}
@Test
public void givenWaitressInstance_whenCalledserveMainCourse_thenOneAssertion() {
assertThat(waitress.serveMainCourse("steak")).isEqualTo("Serving a steak");
}
@Test
public void givenWaitressInstance_whenCalledserveDessert_thenOneAssertion() {
assertThat(waitress.serveDessert("cup of coffee")).isEqualTo("Serving a cup of coffee");
}
}

15
core-java/src/test/java/com/baeldung/system/DateTimeServiceTest.java Normal file
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package com.baeldung.system;
import org.junit.Assert;
import org.junit.Test;
public class DateTimeServiceTest {
@Test
public void givenClass_whenCalledMethods_thenNotNullInResult() {
DateTimeService dateTimeService = new DateTimeService();
Assert.assertNotNull(dateTimeService.nowPlusOneHour());
Assert.assertNotNull(dateTimeService.nowPrettyPrinted());
}
}

14
core-java/src/test/java/com/baeldung/system/EnvironmentVariablesTest.java Normal file
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package com.baeldung.system;
import org.junit.Assert;
import org.junit.Test;
public class EnvironmentVariablesTest {
@Test
public void givenEnvVars_whenReadPath_thenGetValueinResult() {
EnvironmentVariables environmentVariables = new EnvironmentVariables();
Assert.assertNotNull(environmentVariables.getPath());
}
}

27
core-java/src/test/java/com/baeldung/system/SystemArrayCopyTest.java Normal file
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package com.baeldung.system;
import org.junit.Assert;
import org.junit.Test;
public class SystemArrayCopyTest {
@Test
public void givenTwoArraysAB_whenUseArrayCopy_thenArrayCopiedFromAToBInResult() {
int[] a = {34, 22, 44, 2, 55, 3};
int[] b = new int[a.length];
// copy all elements from a to b
System.arraycopy(a, 0, b, 0, a.length);
Assert.assertArrayEquals(a, b);
}
@Test
public void givenTwoArraysAB_whenUseArrayCopyPosition_thenArrayCopiedFromAToBInResult() {
int[] a = {34, 22, 44, 2, 55, 3};
int[] b = new int[a.length];
// copy 2 elements from a, starting at a[1] to b, starting at b[3]
System.arraycopy(a, 1, b, 3, 2);
Assert.assertArrayEquals(new int[] {0, 0, 0, 22, 44, 0}, b);
}
}

16
core-java/src/test/java/com/baeldung/system/SystemNanoTest.java Normal file
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package com.baeldung.system;
import org.junit.Assert;
import org.junit.Test;
public class SystemNanoTest {
@Test
public void givenSystem_whenCalledNanoTime_thenGivesTimeinResult() {
long startTime = System.nanoTime();
// do something that takes time
long endTime = System.nanoTime();
Assert.assertTrue(endTime - startTime < 10000);
}
}

56
core-java/src/test/java/com/baeldung/system/SystemPropertiesTest.java Normal file
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package com.baeldung.system;
import org.junit.Assert;
import org.junit.Ignore;
import org.junit.Test;
import java.util.Properties;
public class SystemPropertiesTest {
@Test
public void givenSystem_whenCalledGetProperty_thenReturnPropertyinResult() {
Assert.assertNotNull(System.getProperty("java.vm.vendor"));
}
@Test
public void givenSystem_whenCalledSetProperty_thenSetPropertyasResult() {
// set a particular property
System.setProperty("abckey", "abcvaluefoo");
Assert.assertEquals("abcvaluefoo", System.getProperty("abckey"));
}
@Test
public void givenSystem_whenCalledClearProperty_thenDeletePropertyasResult() {
// Delete a property
System.clearProperty("abckey");
Assert.assertNull(System.getProperty("abckey"));
}
@Test
public void givenSystem_whenCalledGetPropertyDefaultValue_thenReturnPropertyinResult() {
System.clearProperty("dbHost");
String myKey = System.getProperty("dbHost", "db.host.com");
Assert.assertEquals("db.host.com", myKey);
}
@Test
public void givenSystem_whenCalledGetProperties_thenReturnPropertiesinResult() {
Properties properties = System.getProperties();
Assert.assertNotNull(properties);
}
@Test
@Ignore
public void givenSystem_whenCalledClearProperties_thenDeleteAllPropertiesasResult() {
// Clears all system properties. Use with care!
System.getProperties().clear();
Assert.assertTrue(System.getProperties().isEmpty());
}
}

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