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Merge branch 'master' of github.com:eugenp/tutorials into feature/BAEL-2774-Run-Java-main-method-using-Gradle

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This commit is contained in:
Sorin Zamfir 2019-08-19 19:33:14 +03:00
commit d8b0c63f87
199 changed files with 6138 additions and 553 deletions
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30
algorithms-miscellaneous-3/pom.xml
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@ -1,5 +1,5 @@
<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>
<artifactId>algorithms-miscellaneous-3</artifactId>
<version>0.0.1-SNAPSHOT</version>
@ -18,17 +18,28 @@
<version>${org.assertj.core.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>${commons-collections4.version}</version>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>${commons-collections4.version}</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>com.squareup.retrofit2</groupId>
<artifactId>retrofit</artifactId>
<version>${retrofit.version}</version>
</dependency>
<dependency>
<groupId>com.squareup.retrofit2</groupId>
<artifactId>converter-jackson</artifactId>
<version>${retrofit.version}</version>
</dependency>
<dependency>
@ -61,5 +72,6 @@
<org.assertj.core.version>3.9.0</org.assertj.core.version>
<commons-collections4.version>4.3</commons-collections4.version>
<guava.version>28.0-jre</guava.version>
<retrofit.version>2.6.0</retrofit.version>
</properties>
</project>

35
algorithms-miscellaneous-3/src/main/java/com/baeldung/algorithms/interpolationsearch/InterpolationSearch.java Normal file
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package com.baeldung.algorithms.interpolationsearch;
public class InterpolationSearch {
public static int interpolationSearch(int[] data, int item) {
int highEnd = (data.length - 1);
int lowEnd = 0;
while (item >= data[lowEnd] && item <= data[highEnd] && lowEnd <= highEnd) {
int probe = lowEnd + (highEnd - lowEnd) * (item - data[lowEnd]) / (data[highEnd] - data[lowEnd]);
if (highEnd == lowEnd) {
if (data[lowEnd] == item) {
return lowEnd;
} else {
return -1;
}
}
if (data[probe] == item) {
return probe;
}
if (data[probe] < item) {
lowEnd = probe + 1;
} else {
highEnd = probe - 1;
}
}
return -1;
}
}

45
algorithms-miscellaneous-3/src/main/java/com/baeldung/algorithms/kmeans/Centroid.java Normal file
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package com.baeldung.algorithms.kmeans;
import java.util.Map;
import java.util.Objects;
/**
* Encapsulates all coordinates for a particular cluster centroid.
*/
public class Centroid {
/**
* The centroid coordinates.
*/
private final Map<String, Double> coordinates;
public Centroid(Map<String, Double> coordinates) {
this.coordinates = coordinates;
}
public Map<String, Double> getCoordinates() {
return coordinates;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Centroid centroid = (Centroid) o;
return Objects.equals(getCoordinates(), centroid.getCoordinates());
}
@Override
public int hashCode() {
return Objects.hash(getCoordinates());
}
@Override
public String toString() {
return "Centroid " + coordinates;
}
}

20
algorithms-miscellaneous-3/src/main/java/com/baeldung/algorithms/kmeans/Distance.java Normal file
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package com.baeldung.algorithms.kmeans;
import java.util.Map;
/**
* Defines a contract to calculate distance between two feature vectors. The less the
* calculated distance, the more two items are similar to each other.
*/
public interface Distance {
/**
* Calculates the distance between two feature vectors.
*
* @param f1 The first set of features.
* @param f2 The second set of features.
* @return Calculated distance.
* @throws IllegalArgumentException If the given feature vectors are invalid.
*/
double calculate(Map<String, Double> f1, Map<String, Double> f2);
}

23
algorithms-miscellaneous-3/src/main/java/com/baeldung/algorithms/kmeans/Errors.java Normal file
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@ -0,0 +1,23 @@
package com.baeldung.algorithms.kmeans;
import java.util.List;
import java.util.Map;
/**
* Encapsulates methods to calculates errors between centroid and the cluster members.
*/
public class Errors {
public static double sse(Map<Centroid, List<Record>> clustered, Distance distance) {
double sum = 0;
for (Map.Entry<Centroid, List<Record>> entry : clustered.entrySet()) {
Centroid centroid = entry.getKey();
for (Record record : entry.getValue()) {
double d = distance.calculate(centroid.getCoordinates(), record.getFeatures());
sum += Math.pow(d, 2);
}
}
return sum;
}
}

26
algorithms-miscellaneous-3/src/main/java/com/baeldung/algorithms/kmeans/EuclideanDistance.java Normal file
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@ -0,0 +1,26 @@
package com.baeldung.algorithms.kmeans;
import java.util.Map;
/**
* Calculates the distance between two items using the Euclidean formula.
*/
public class EuclideanDistance implements Distance {
@Override
public double calculate(Map<String, Double> f1, Map<String, Double> f2) {
if (f1 == null || f2 == null) {
throw new IllegalArgumentException("Feature vectors can't be null");
}
double sum = 0;
for (String key : f1.keySet()) {
Double v1 = f1.get(key);
Double v2 = f2.get(key);
if (v1 != null && v2 != null) sum += Math.pow(v1 - v2, 2);
}
return Math.sqrt(sum);
}
}

236
algorithms-miscellaneous-3/src/main/java/com/baeldung/algorithms/kmeans/KMeans.java Normal file
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@ -0,0 +1,236 @@
package com.baeldung.algorithms.kmeans;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import static java.util.stream.Collectors.toList;
import static java.util.stream.Collectors.toSet;
/**
* Encapsulates an implementation of KMeans clustering algorithm.
*
* @author Ali Dehghani
*/
public class KMeans {
private KMeans() {
throw new IllegalAccessError("You shouldn't call this constructor");
}
/**
* Will be used to generate random numbers.
*/
private static final Random random = new Random();
/**
* Performs the K-Means clustering algorithm on the given dataset.
*
* @param records The dataset.
* @param k Number of Clusters.
* @param distance To calculate the distance between two items.
* @param maxIterations Upper bound for the number of iterations.
* @return K clusters along with their features.
*/
public static Map<Centroid, List<Record>> fit(List<Record> records, int k, Distance distance, int maxIterations) {
applyPreconditions(records, k, distance, maxIterations);
List<Centroid> centroids = randomCentroids(records, k);
Map<Centroid, List<Record>> clusters = new HashMap<>();
Map<Centroid, List<Record>> lastState = new HashMap<>();
// iterate for a pre-defined number of times
for (int i = 0; i < maxIterations; i++) {
boolean isLastIteration = i == maxIterations - 1;
// in each iteration we should find the nearest centroid for each record
for (Record record : records) {
Centroid centroid = nearestCentroid(record, centroids, distance);
assignToCluster(clusters, record, centroid);
}
// if the assignment does not change, then the algorithm terminates
boolean shouldTerminate = isLastIteration || clusters.equals(lastState);
lastState = clusters;
if (shouldTerminate) {
break;
}
// at the end of each iteration we should relocate the centroids
centroids = relocateCentroids(clusters);
clusters = new HashMap<>();
}
return lastState;
}
/**
* Move all cluster centroids to the average of all assigned features.
*
* @param clusters The current cluster configuration.
* @return Collection of new and relocated centroids.
*/
private static List<Centroid> relocateCentroids(Map<Centroid, List<Record>> clusters) {
return clusters
.entrySet()
.stream()
.map(e -> average(e.getKey(), e.getValue()))
.collect(toList());
}
/**
* Moves the given centroid to the average position of all assigned features. If
* the centroid has no feature in its cluster, then there would be no need for a
* relocation. Otherwise, for each entry we calculate the average of all records
* first by summing all the entries and then dividing the final summation value by
* the number of records.
*
* @param centroid The centroid to move.
* @param records The assigned features.
* @return The moved centroid.
*/
private static Centroid average(Centroid centroid, List<Record> records) {
// if this cluster is empty, then we shouldn't move the centroid
if (records == null || records.isEmpty()) {
return centroid;
}
// Since some records don't have all possible attributes, we initialize
// average coordinates equal to current centroid coordinates
Map<String, Double> average = centroid.getCoordinates();
// The average function works correctly if we clear all coordinates corresponding
// to present record attributes
records
.stream()
.flatMap(e -> e
.getFeatures()
.keySet()
.stream())
.forEach(k -> average.put(k, 0.0));
for (Record record : records) {
record
.getFeatures()
.forEach((k, v) -> average.compute(k, (k1, currentValue) -> v + currentValue));
}
average.forEach((k, v) -> average.put(k, v / records.size()));
return new Centroid(average);
}
/**
* Assigns a feature vector to the given centroid. If this is the first assignment for this centroid,
* first we should create the list.
*
* @param clusters The current cluster configuration.
* @param record The feature vector.
* @param centroid The centroid.
*/
private static void assignToCluster(Map<Centroid, List<Record>> clusters, Record record, Centroid centroid) {
clusters.compute(centroid, (key, list) -> {
if (list == null) {
list = new ArrayList<>();
}
list.add(record);
return list;
});
}
/**
* With the help of the given distance calculator, iterates through centroids and finds the
* nearest one to the given record.
*
* @param record The feature vector to find a centroid for.
* @param centroids Collection of all centroids.
* @param distance To calculate the distance between two items.
* @return The nearest centroid to the given feature vector.
*/
private static Centroid nearestCentroid(Record record, List<Centroid> centroids, Distance distance) {
double minimumDistance = Double.MAX_VALUE;
Centroid nearest = null;
for (Centroid centroid : centroids) {
double currentDistance = distance.calculate(record.getFeatures(), centroid.getCoordinates());
if (currentDistance < minimumDistance) {
minimumDistance = currentDistance;
nearest = centroid;
}
}
return nearest;
}
/**
* Generates k random centroids. Before kicking-off the centroid generation process,
* first we calculate the possible value range for each attribute. Then when
* we're going to generate the centroids, we generate random coordinates in
* the [min, max] range for each attribute.
*
* @param records The dataset which helps to calculate the [min, max] range for
* each attribute.
* @param k Number of clusters.
* @return Collections of randomly generated centroids.
*/
private static List<Centroid> randomCentroids(List<Record> records, int k) {
List<Centroid> centroids = new ArrayList<>();
Map<String, Double> maxs = new HashMap<>();
Map<String, Double> mins = new HashMap<>();
for (Record record : records) {
record
.getFeatures()
.forEach((key, value) -> {
// compares the value with the current max and choose the bigger value between them
maxs.compute(key, (k1, max) -> max == null || value > max ? value : max);
// compare the value with the current min and choose the smaller value between them
mins.compute(key, (k1, min) -> min == null || value < min ? value : min);
});
}
Set<String> attributes = records
.stream()
.flatMap(e -> e
.getFeatures()
.keySet()
.stream())
.collect(toSet());
for (int i = 0; i < k; i++) {
Map<String, Double> coordinates = new HashMap<>();
for (String attribute : attributes) {
double max = maxs.get(attribute);
double min = mins.get(attribute);
coordinates.put(attribute, random.nextDouble() * (max - min) + min);
}
centroids.add(new Centroid(coordinates));
}
return centroids;
}
private static void applyPreconditions(List<Record> records, int k, Distance distance, int maxIterations) {
if (records == null || records.isEmpty()) {
throw new IllegalArgumentException("The dataset can't be empty");
}
if (k <= 1) {
throw new IllegalArgumentException("It doesn't make sense to have less than or equal to 1 cluster");
}
if (distance == null) {
throw new IllegalArgumentException("The distance calculator is required");
}
if (maxIterations <= 0) {
throw new IllegalArgumentException("Max iterations should be a positive number");
}
}
}

144
algorithms-miscellaneous-3/src/main/java/com/baeldung/algorithms/kmeans/LastFm.java Normal file
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package com.baeldung.algorithms.kmeans;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import com.fasterxml.jackson.databind.ObjectMapper;
import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.converter.jackson.JacksonConverterFactory;
import static java.util.stream.Collectors.toSet;
public class LastFm {
private static OkHttpClient okHttp = new OkHttpClient.Builder()
.addInterceptor(new LastFmService.Authenticator("put your API key here"))
.build();
private static Retrofit retrofit = new Retrofit.Builder()
.client(okHttp)
.addConverterFactory(JacksonConverterFactory.create())
.baseUrl("http://ws.audioscrobbler.com/")
.build();
private static LastFmService lastFm = retrofit.create(LastFmService.class);
private static ObjectMapper mapper = new ObjectMapper();
public static void main(String[] args) throws IOException {
List<String> artists = getTop100Artists();
Set<String> tags = getTop100Tags();
List<Record> records = datasetWithTaggedArtists(artists, tags);
Map<Centroid, List<Record>> clusters = KMeans.fit(records, 7, new EuclideanDistance(), 1000);
// Print the cluster configuration
clusters.forEach((key, value) -> {
System.out.println("------------------------------ CLUSTER -----------------------------------");
System.out.println(sortedCentroid(key));
String members = String.join(", ", value
.stream()
.map(Record::getDescription)
.collect(toSet()));
System.out.print(members);
System.out.println();
System.out.println();
});
Map<String, Object> json = convertToD3CompatibleMap(clusters);
System.out.println(mapper.writeValueAsString(json));
}
private static Map<String, Object> convertToD3CompatibleMap(Map<Centroid, List<Record>> clusters) {
Map<String, Object> json = new HashMap<>();
json.put("name", "Musicians");
List<Map<String, Object>> children = new ArrayList<>();
clusters.forEach((key, value) -> {
Map<String, Object> child = new HashMap<>();
child.put("name", dominantGenre(sortedCentroid(key)));
List<Map<String, String>> nested = new ArrayList<>();
for (Record record : value) {
nested.add(Collections.singletonMap("name", record.getDescription()));
}
child.put("children", nested);
children.add(child);
});
json.put("children", children);
return json;
}
private static String dominantGenre(Centroid centroid) {
return centroid
.getCoordinates()
.keySet()
.stream()
.limit(2)
.collect(Collectors.joining(", "));
}
private static Centroid sortedCentroid(Centroid key) {
List<Map.Entry<String, Double>> entries = new ArrayList<>(key
.getCoordinates()
.entrySet());
entries.sort((e1, e2) -> e2
.getValue()
.compareTo(e1.getValue()));
Map<String, Double> sorted = new LinkedHashMap<>();
for (Map.Entry<String, Double> entry : entries) {
sorted.put(entry.getKey(), entry.getValue());
}
return new Centroid(sorted);
}
private static List<Record> datasetWithTaggedArtists(List<String> artists, Set<String> topTags) throws IOException {
List<Record> records = new ArrayList<>();
for (String artist : artists) {
Map<String, Double> tags = lastFm
.topTagsFor(artist)
.execute()
.body()
.all();
// Only keep popular tags.
tags
.entrySet()
.removeIf(e -> !topTags.contains(e.getKey()));
records.add(new Record(artist, tags));
}
return records;
}
private static Set<String> getTop100Tags() throws IOException {
return lastFm
.topTags()
.execute()
.body()
.all();
}
private static List<String> getTop100Artists() throws IOException {
List<String> artists = new ArrayList<>();
for (int i = 1; i <= 2; i++) {
artists.addAll(lastFm
.topArtists(i)
.execute()
.body()
.all());
}
return artists;
}
}

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algorithms-miscellaneous-3/src/main/java/com/baeldung/algorithms/kmeans/LastFmService.java Normal file
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@ -0,0 +1,118 @@
package com.baeldung.algorithms.kmeans;
import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonProperty;
import okhttp3.HttpUrl;
import okhttp3.Interceptor;
import okhttp3.Request;
import okhttp3.Response;
import retrofit2.Call;
import retrofit2.http.GET;
import retrofit2.http.Query;
import static com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility.ANY;
import static java.util.stream.Collectors.toList;
public interface LastFmService {
@GET("/2.0/?method=chart.gettopartists&format=json&limit=50")
Call<Artists> topArtists(@Query("page") int page);
@GET("/2.0/?method=artist.gettoptags&format=json&limit=20&autocorrect=1")
Call<Tags> topTagsFor(@Query("artist") String artist);
@GET("/2.0/?method=chart.gettoptags&format=json&limit=100")
Call<TopTags> topTags();
/**
* HTTP interceptor to intercept all HTTP requests and add the API key to them.
*/
class Authenticator implements Interceptor {
private final String apiKey;
Authenticator(String apiKey) {
this.apiKey = apiKey;
}
@Override
public Response intercept(Chain chain) throws IOException {
HttpUrl url = chain
.request()
.url()
.newBuilder()
.addQueryParameter("api_key", apiKey)
.build();
Request request = chain
.request()
.newBuilder()
.url(url)
.build();
return chain.proceed(request);
}
}
@JsonAutoDetect(fieldVisibility = ANY)
class TopTags {
private Map<String, Object> tags;
@SuppressWarnings("unchecked")
public Set<String> all() {
List<Map<String, Object>> topTags = (List<Map<String, Object>>) tags.get("tag");
return topTags
.stream()
.map(e -> ((String) e.get("name")))
.collect(Collectors.toSet());
}
}
@JsonAutoDetect(fieldVisibility = ANY)
class Tags {
@JsonProperty("toptags") private Map<String, Object> topTags;
@SuppressWarnings("unchecked")
public Map<String, Double> all() {
try {
Map<String, Double> all = new HashMap<>();
List<Map<String, Object>> tags = (List<Map<String, Object>>) topTags.get("tag");
for (Map<String, Object> tag : tags) {
all.put(((String) tag.get("name")), ((Integer) tag.get("count")).doubleValue());
}
return all;
} catch (Exception e) {
return Collections.emptyMap();
}
}
}
@JsonAutoDetect(fieldVisibility = ANY)
class Artists {
private Map<String, Object> artists;
@SuppressWarnings("unchecked")
public List<String> all() {
try {
List<Map<String, Object>> artists = (List<Map<String, Object>>) this.artists.get("artist");
return artists
.stream()
.map(e -> ((String) e.get("name")))
.collect(toList());
} catch (Exception e) {
return Collections.emptyList();
}
}
}
}

65
algorithms-miscellaneous-3/src/main/java/com/baeldung/algorithms/kmeans/Record.java Normal file
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@ -0,0 +1,65 @@
package com.baeldung.algorithms.kmeans;
import java.util.Map;
import java.util.Objects;
/**
* Encapsulates all feature values for a few attributes. Optionally each record
* can be described with the {@link #description} field.
*/
public class Record {
/**
* The record description. For example, this can be the artist name for the famous musician
* example.
*/
private final String description;
/**
* Encapsulates all attributes and their corresponding values, i.e. features.
*/
private final Map<String, Double> features;
public Record(String description, Map<String, Double> features) {
this.description = description;
this.features = features;
}
public Record(Map<String, Double> features) {
this("", features);
}
public String getDescription() {
return description;
}
public Map<String, Double> getFeatures() {
return features;
}
@Override
public String toString() {
String prefix = description == null || description
.trim()
.isEmpty() ? "Record" : description;
return prefix + ": " + features;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Record record = (Record) o;
return Objects.equals(getDescription(), record.getDescription()) && Objects.equals(getFeatures(), record.getFeatures());
}
@Override
public int hashCode() {
return Objects.hash(getDescription(), getFeatures());
}
}

16
algorithms-miscellaneous-3/src/main/java/com/baeldung/algorithms/printtriangles/PrintTriangleExamples.java
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@ -4,7 +4,7 @@ import org.apache.commons.lang3.StringUtils;
public class PrintTriangleExamples {
public static String printARightAngledTriangle(int N) {
public static String printARightTriangle(int N) {
StringBuilder result = new StringBuilder();
for (int r = 1; r <= N; r++) {
for (int j = 1; j <= r; j++) {
@ -29,6 +29,17 @@ public class PrintTriangleExamples {
return result.toString();
}
public static String printAnIsoscelesTriangleUsingStringUtils(int N) {
StringBuilder result = new StringBuilder();
for (int r = 1; r <= N; r++) {
result.append(StringUtils.repeat(' ', N - r));
result.append(StringUtils.repeat('*', 2 * r - 1));
result.append(System.lineSeparator());
}
return result.toString();
}
public static String printAnIsoscelesTriangleUsingSubstring(int N) {
StringBuilder result = new StringBuilder();
String helperString = StringUtils.repeat(' ', N - 1) + StringUtils.repeat('*', N * 2 - 1);
@ -41,8 +52,9 @@ public class PrintTriangleExamples {
}
public static void main(String[] args) {
System.out.println(printARightAngledTriangle(5));
System.out.println(printARightTriangle(5));
System.out.println(printAnIsoscelesTriangle(5));
System.out.println(printAnIsoscelesTriangleUsingStringUtils(5));
System.out.println(printAnIsoscelesTriangleUsingSubstring(5));
}

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algorithms-miscellaneous-3/src/main/resources/kmeans/artists.json Normal file
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algorithms-miscellaneous-3/src/main/resources/kmeans/lastfm.json Normal file
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@ -0,0 +1,490 @@
{
"children": [
{
"children": [
{
"name": "Radiohead"
},
{
"name": "Red Hot Chili Peppers"
},
{
"name": "Coldplay"
},
{
"name": "Nirvana"
},
{
"name": "Panic! at the Disco"
},
{
"name": "The Cure"
},
{
"name": "Linkin Park"
},
{
"name": "Radiohead"
},
{
"name": "Red Hot Chili Peppers"
},
{
"name": "Coldplay"
},
{
"name": "Nirvana"
},
{
"name": "Panic! at the Disco"
},
{
"name": "The Cure"
},
{
"name": "Linkin Park"
},
{
"name": "Muse"
},
{
"name": "Maroon 5"
},
{
"name": "Foo Fighters"
},
{
"name": "Paramore"
},
{
"name": "Oasis"
},
{
"name": "Fall Out Boy"
},
{
"name": "OneRepublic"
},
{
"name": "Weezer"
},
{
"name": "System of a Down"
},
{
"name": "The White Stripes"
}
],
"name": "rock, alternative"
},
{
"children": [
{
"name": "Lil Nas X"
},
{
"name": "Post Malone"
},
{
"name": "Drake"
},
{
"name": "Kanye West"
},
{
"name": "Kendrick Lamar"
},
{
"name": "Tyler, the Creator"
},
{
"name": "Eminem"
},
{
"name": "Childish Gambino"
},
{
"name": "Frank Ocean"
},
{
"name": "Lil Nas X"
},
{
"name": "Post Malone"
},
{
"name": "Drake"
},
{
"name": "Kanye West"
},
{
"name": "Kendrick Lamar"
},
{
"name": "Tyler, the Creator"
},
{
"name": "Eminem"
},
{
"name": "Childish Gambino"
},
{
"name": "Frank Ocean"
},
{
"name": "Lizzo"
},
{
"name": "Travi$ Scott"
},
{
"name": "A$AP Rocky"
},
{
"name": "Nicki Minaj"
},
{
"name": "xxxtentacion"
}
],
"name": "Hip-Hop, rap"
},
{
"children": [
{
"name": "Arctic Monkeys"
},
{
"name": "Imagine Dragons"
},
{
"name": "The Killers"
},
{
"name": "Gorillaz"
},
{
"name": "The Black Keys"
},
{
"name": "Arctic Monkeys"
},
{
"name": "Imagine Dragons"
},
{
"name": "The Killers"
},
{
"name": "Gorillaz"
},
{
"name": "The Black Keys"
},
{
"name": "Twenty One Pilots"
},
{
"name": "Ellie Goulding"
},
{
"name": "Florence + the Machine"
},
{
"name": "Vampire Weekend"
},
{
"name": "The Smiths"
},
{
"name": "The Strokes"
},
{
"name": "MGMT"
},
{
"name": "Foster the People"
},
{
"name": "Two Door Cinema Club"
},
{
"name": "Cage the Elephant"
},
{
"name": "Arcade Fire"
},
{
"name": "The 1975"
}
],
"name": "indie, alternative"
},
{
"children": [
{
"name": "Ed Sheeran"
},
{
"name": "Tame Impala"
},
{
"name": "Ed Sheeran"
},
{
"name": "Tame Impala"
},
{
"name": "Green Day"
},
{
"name": "Metallica"
},
{
"name": "blink-182"
},
{
"name": "Bon Iver"
},
{
"name": "The Clash"
}
],
"name": "rock, punk rock"
},
{
"children": [
{
"name": "Calvin Harris"
},
{
"name": "The Weeknd"
},
{
"name": "The Chainsmokers"
},
{
"name": "Daft Punk"
},
{
"name": "Marshmello"
},
{
"name": "David Guetta"
},
{
"name": "Calvin Harris"
},
{
"name": "The Weeknd"
},
{
"name": "The Chainsmokers"
},
{
"name": "Daft Punk"
},
{
"name": "Marshmello"
},
{
"name": "David Guetta"
},
{
"name": "Avicii"
},
{
"name": "Kygo"
},
{
"name": "Martin Garrix"
},
{
"name": "Major Lazer"
},
{
"name": "Depeche Mode"
}
],
"name": "electronic, dance"
},
{
"children": [
{
"name": "Queen"
},
{
"name": "The Beatles"
},
{
"name": "David Bowie"
},
{
"name": "Fleetwood Mac"
},
{
"name": "Pink Floyd"
},
{
"name": "The Rolling Stones"
},
{
"name": "Led Zeppelin"
},
{
"name": "Queen"
},
{
"name": "The Beatles"
},
{
"name": "David Bowie"
},
{
"name": "Fleetwood Mac"
},
{
"name": "Pink Floyd"
},
{
"name": "The Rolling Stones"
},
{
"name": "Led Zeppelin"
},
{
"name": "Elton John"
}
],
"name": "classic rock, rock"
},
{
"children": [
{
"name": "Billie Eilish"
},
{
"name": "Ariana Grande"
},
{
"name": "Taylor Swift"
},
{
"name": "Beyoncé"
},
{
"name": "Shawn Mendes"
},
{
"name": "Rihanna"
},
{
"name": "Lana Del Rey"
},
{
"name": "Katy Perry"
},
{
"name": "Lady Gaga"
},
{
"name": "Miley Cyrus"
},
{
"name": "Mark Ronson"
},
{
"name": "Madonna"
},
{
"name": "Lorde"
},
{
"name": "Khalid"
},
{
"name": "Billie Eilish"
},
{
"name": "Ariana Grande"
},
{
"name": "Taylor Swift"
},
{
"name": "Beyoncé"
},
{
"name": "Shawn Mendes"
},
{
"name": "Rihanna"
},
{
"name": "Lana Del Rey"
},
{
"name": "Katy Perry"
},
{
"name": "Lady Gaga"
},
{
"name": "Miley Cyrus"
},
{
"name": "Mark Ronson"
},
{
"name": "Madonna"
},
{
"name": "Lorde"
},
{
"name": "Khalid"
},
{
"name": "Sia"
},
{
"name": "Sam Smith"
},
{
"name": "Halsey"
},
{
"name": "Michael Jackson"
},
{
"name": "Charli XCX"
},
{
"name": "Britney Spears"
},
{
"name": "Dua Lipa"
},
{
"name": "Jonas Brothers"
},
{
"name": "Bruno Mars"
},
{
"name": "Carly Rae Jepsen"
},
{
"name": "P!nk"
},
{
"name": "Adele"
}
],
"name": "pop, female vocalists"
}
],
"name": "Musicians"
}

68
algorithms-miscellaneous-3/src/main/resources/kmeans/radial.html Normal file
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@ -0,0 +1,68 @@
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 1.5px;
}
.node {
font: 10px sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var diameter = 1100;
var tree = d3.layout.tree()
.size([360, diameter / 2 - 300])
.separation(function (a, b) {
return (a.parent == b.parent ? 1 : 2) / a.depth;
});
var diagonal = d3.svg.diagonal.radial()
.projection(function (d) {
return [d.y, d.x / 180 * Math.PI];
});
var svg = d3.select("body").append("svg")
.attr("width", diameter)
.attr("height", diameter - 150)
.append("g")
.attr("transform", "translate(" + diameter / 2 + "," + diameter / 2 + ")");
d3.json("lastfm.json", function (error, root) {
var nodes = tree.nodes(root),
links = tree.links(nodes);
var link = svg.selectAll(".link")
.data(links)
.enter().append("path")
.attr("class", "link")
.attr("d", diagonal);
var node = svg.selectAll(".node")
.data(nodes)
.enter().append("g")
.attr("class", "node")
.attr("transform", function (d) {
return "rotate(" + (d.x - 90) + ")translate(" + d.y + ")";
})
node.append("circle")
.attr("r", 4.5);
node.append("text")
.attr("dy", ".31em")
.attr("text-anchor", function (d) {
return d.x < 180 ? "start" : "end";
})
.attr("transform", function (d) {
return d.x < 180 ? "translate(8)" : "rotate(180)translate(-8)";
})
.text(function (d) {
return d.name;
});
});
d3.select(self.frameElement).style("height", diameter - 150 + "px");
</script>

29
algorithms-miscellaneous-3/src/test/java/com/baeldung/algorithms/interpolationsearch/InterpolationSearchUnitTest.java Normal file
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@ -0,0 +1,29 @@
package com.baeldung.algorithms.interpolationsearch;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.Before;
import org.junit.Test;
public class InterpolationSearchUnitTest {
private int[] myData;
@Before
public void setUp() {
myData = new int[]{13,21,34,55,69,73,84,101};
}
@Test
public void givenSortedArray_whenLookingFor84_thenReturn6() {
int pos = InterpolationSearch.interpolationSearch(myData, 84);
assertEquals(6, pos);
}
@Test
public void givenSortedArray_whenLookingFor19_thenReturnMinusOne() {
int pos = InterpolationSearch.interpolationSearch(myData, 19);
assertEquals(-1, pos);
}
}

20
algorithms-miscellaneous-3/src/test/java/com/baeldung/algorithms/printtriangles/PrintTriangleExamplesUnitTest.java
View File

@ -9,9 +9,9 @@ import static org.junit.Assert.assertEquals;
@RunWith(JUnitParamsRunner.class)
public class PrintTriangleExamplesUnitTest {
private static Object[][] rightAngledTriangles() {
String expected0 = "";
private static Object[][] rightTriangles() {
String expected0 = "";
String expected2 = "*" + System.lineSeparator()
+ "**" + System.lineSeparator();
@ -39,9 +39,9 @@ public class PrintTriangleExamplesUnitTest {
}
@Test
@Parameters(method = "rightAngledTriangles")
public void whenPrintARightAngledTriangleIsCalled_ThenTheCorrectStringIsReturned(int nrOfRows, String expected) {
String actual = PrintTriangleExamples.printARightAngledTriangle(nrOfRows);
@Parameters(method = "rightTriangles")
public void whenPrintARightTriangleIsCalled_ThenTheCorrectStringIsReturned(int nrOfRows, String expected) {
String actual = PrintTriangleExamples.printARightTriangle(nrOfRows);
assertEquals(expected, actual);
}
@ -81,6 +81,14 @@ public class PrintTriangleExamplesUnitTest {
assertEquals(expected, actual);
}
@Test
@Parameters(method = "isoscelesTriangles")
public void whenPrintAnIsoscelesTriangleUsingStringUtilsIsCalled_ThenTheCorrectStringIsReturned(int nrOfRows, String expected) {
String actual = PrintTriangleExamples.printAnIsoscelesTriangleUsingStringUtils(nrOfRows);
assertEquals(expected, actual);
}
@Test
@Parameters(method = "isoscelesTriangles")

1
algorithms-sorting/README.md
View File

@ -5,3 +5,4 @@
- [Quicksort Algorithm Implementation in Java](https://www.baeldung.com/java-quicksort)
- [Insertion Sort in Java](https://www.baeldung.com/java-insertion-sort)
- [Heap Sort in Java](https://www.baeldung.com/java-heap-sort)
- [Shell Sort in Java](https://www.baeldung.com/java-shell-sort)

1
core-groovy-2/README.md
View File

@ -8,3 +8,4 @@
- [Pattern Matching in Strings in Groovy](https://www.baeldung.com/groovy-pattern-matching)
- [Working with XML in Groovy](https://www.baeldung.com/groovy-xml)
- [Integrating Groovy into Java Applications](https://www.baeldung.com/groovy-java-applications)
- [Concatenate Strings with Groovy](https://www.baeldung.com/groovy-concatenate-strings)

2
core-java-modules/core-java-arrays-2/README.MD
View File

@ -1,3 +1,5 @@
## Relevant Articles
- [Extending an Array’s Length](https://www.baeldung.com/java-array-add-element-at-the-end)
- [Checking If an Array Is Sorted in Java](https://www.baeldung.com/java-check-sorted-array)
- [Looping Diagonally Through a 2d Java Array](https://www.baeldung.com/java-loop-diagonal-array)

11
core-java-modules/core-java-concurrency-basic/src/main/java/com/baeldung/concurrent/mutex/SequenceGenerator.java Normal file
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@ -0,0 +1,11 @@
package com.baeldung.concurrent.mutex;
public class SequenceGenerator {
private int currentValue = 0;
public int getNextSequence() throws InterruptedException {
currentValue = currentValue + 1;
Thread.sleep(500);
return currentValue;
}
}

18
core-java-modules/core-java-concurrency-basic/src/main/java/com/baeldung/concurrent/mutex/SequenceGeneratorUsingMonitor.java Normal file
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@ -0,0 +1,18 @@
package com.baeldung.concurrent.mutex;
import com.google.common.util.concurrent.Monitor;
public class SequenceGeneratorUsingMonitor extends SequenceGenerator {
private Monitor monitor = new Monitor();
@Override
public int getNextSequence() throws InterruptedException {
monitor.enter();
try {
return super.getNextSequence();
} finally {
monitor.leave();
}
}
}

18
core-java-modules/core-java-concurrency-basic/src/main/java/com/baeldung/concurrent/mutex/SequenceGeneratorUsingReentrantLock.java Normal file
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@ -0,0 +1,18 @@
package com.baeldung.concurrent.mutex;
import java.util.concurrent.locks.ReentrantLock;
public class SequenceGeneratorUsingReentrantLock extends SequenceGenerator {
private ReentrantLock mutex = new ReentrantLock();
@Override
public int getNextSequence() throws InterruptedException {
try {
mutex.lock();
return super.getNextSequence();
} finally {
mutex.unlock();
}
}
}

18
core-java-modules/core-java-concurrency-basic/src/main/java/com/baeldung/concurrent/mutex/SequenceGeneratorUsingSemaphore.java Normal file
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@ -0,0 +1,18 @@
package com.baeldung.concurrent.mutex;
import java.util.concurrent.Semaphore;
public class SequenceGeneratorUsingSemaphore extends SequenceGenerator {
private Semaphore mutex = new Semaphore(1);
@Override
public int getNextSequence() throws InterruptedException {
try {
mutex.acquire();
return super.getNextSequence();
} finally {
mutex.release();
}
}
}

12
core-java-modules/core-java-concurrency-basic/src/main/java/com/baeldung/concurrent/mutex/SequenceGeneratorUsingSynchronizedBlock.java Normal file
View File

@ -0,0 +1,12 @@
package com.baeldung.concurrent.mutex;
public class SequenceGeneratorUsingSynchronizedBlock extends SequenceGenerator {
@Override
public int getNextSequence() throws InterruptedException {
synchronized (this) {
return super.getNextSequence();
}
}
}

10
core-java-modules/core-java-concurrency-basic/src/main/java/com/baeldung/concurrent/mutex/SequenceGeneratorUsingSynchronizedMethod.java Normal file
View File

@ -0,0 +1,10 @@
package com.baeldung.concurrent.mutex;
public class SequenceGeneratorUsingSynchronizedMethod extends SequenceGenerator {
@Override
public synchronized int getNextSequence() throws InterruptedException {
return super.getNextSequence();
}
}

81
core-java-modules/core-java-concurrency-basic/src/test/java/com/baeldung/concurrent/mutex/MutexUnitTest.java Normal file
View File

@ -0,0 +1,81 @@
package com.baeldung.concurrent.mutex;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import org.junit.Assert;
import org.junit.Test;
import com.baeldung.concurrent.mutex.SequenceGenerator;
import com.baeldung.concurrent.mutex.SequenceGeneratorUsingMonitor;
import com.baeldung.concurrent.mutex.SequenceGeneratorUsingReentrantLock;
import com.baeldung.concurrent.mutex.SequenceGeneratorUsingSemaphore;
import com.baeldung.concurrent.mutex.SequenceGeneratorUsingSynchronizedBlock;
import com.baeldung.concurrent.mutex.SequenceGeneratorUsingSynchronizedMethod;
public class MutexUnitTest {
private final int RANGE = 30;
@Test
public void givenUnsafeSequenceGenerator_whenRaceCondition_thenUnexpectedBehavior() throws Exception {
Set<Integer> uniqueSequences = getASetOFUniqueSequences(new SequenceGenerator());
Assert.assertNotEquals(RANGE, uniqueSequences.size());
}
@Test
public void givenSequenceGeneratorUsingSynchronizedMethod_whenRaceCondition_thenSuccess() throws Exception {
Set<Integer> uniqueSequences = getASetOFUniqueSequences(new SequenceGeneratorUsingSynchronizedMethod());
Assert.assertEquals(RANGE, uniqueSequences.size());
}
@Test
public void givenSequenceGeneratorUsingSynchronizedBlock_whenRaceCondition_thenSuccess() throws Exception {
Set<Integer> uniqueSequences = getASetOFUniqueSequences(new SequenceGeneratorUsingSynchronizedBlock());
Assert.assertEquals(RANGE, uniqueSequences.size());
}
@Test
public void givenSequenceGeneratorUsingReentrantLock_whenRaceCondition_thenSuccess() throws Exception {
Set<Integer> uniqueSequences = getASetOFUniqueSequences(new SequenceGeneratorUsingReentrantLock());
Assert.assertEquals(RANGE, uniqueSequences.size());
}
@Test
public void givenSequenceGeneratorUsingSemaphore_whenRaceCondition_thenSuccess() throws Exception {
Set<Integer> uniqueSequences = getASetOFUniqueSequences(new SequenceGeneratorUsingSemaphore());
Assert.assertEquals(RANGE, uniqueSequences.size());
}
@Test
public void givenSequenceGeneratorUsingMonitor_whenRaceCondition_thenSuccess() throws Exception {
Set<Integer> uniqueSequences = getASetOFUniqueSequences(new SequenceGeneratorUsingMonitor());
Assert.assertEquals(RANGE, uniqueSequences.size());
}
private Set<Integer> getASetOFUniqueSequences(SequenceGenerator generator) throws Exception {
ExecutorService executor = Executors.newFixedThreadPool(3);
Set<Integer> uniqueSequences = new HashSet<>();
List<Future<Integer>> futures = new ArrayList<>();
for (int i = 0; i < RANGE; i++) {
futures.add(executor.submit(generator::getNextSequence));
}
for (Future<Integer> future : futures) {
uniqueSequences.add(future.get());
}
executor.awaitTermination(15, TimeUnit.SECONDS);
executor.shutdown();
return uniqueSequences;
}
}

65
core-java-modules/core-java-jndi/pom.xml Normal file
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@ -0,0 +1,65 @@
<?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>
<groupId>com.baeldung.jndi</groupId>
<artifactId>core-java-jndi</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
<relativePath>../../</relativePath>
</parent>
<dependencies>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>5.5.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.0.9.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.0.9.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.0.9.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.0.9.RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.199</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

60
core-java-modules/core-java-jndi/src/test/java/com/baeldung/jndi/JndiUnitTest.java Normal file
View File

@ -0,0 +1,60 @@
package com.baeldung.jndi;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.jndi.JndiTemplate;
import org.springframework.mock.jndi.SimpleNamingContextBuilder;
import javax.naming.*;
import javax.sql.DataSource;
import java.util.Enumeration;
import static org.junit.jupiter.api.Assertions.*;
class JndiUnitTest {
private static InitialContext ctx;
private static DriverManagerDataSource ds;
@BeforeAll
static void setUp() throws Exception {
SimpleNamingContextBuilder builder = new SimpleNamingContextBuilder();
ds = new DriverManagerDataSource("jdbc:h2:mem:mydb");
builder.activate();
JndiTemplate jndiTemplate = new JndiTemplate();
ctx = (InitialContext) jndiTemplate.getContext();
}
@Test
void givenACompositeName_whenAddingAnElement_thenNameIncludesIt() throws Exception {
Name objectName = new CompositeName("java:comp/env/jdbc");
Enumeration<String> elements = objectName.getAll();
while(elements.hasMoreElements()) {
System.out.println(elements.nextElement());
}
objectName.add("example");
assertEquals("env", objectName.get(1));
assertEquals("example", objectName.get(objectName.size() - 1));
}
@Test
void givenADataSource_whenAddingDriver_thenBind() throws Exception {
ds.setDriverClassName("org.h2.Driver");
ctx.bind("java:comp/env/jdbc/datasource", ds);
}
@Test
void givenContext_whenLookupByName_thenValidDataSource() throws Exception {
DataSource ds = (DataSource) ctx.lookup("java:comp/env/jdbc/datasource");
assertNotNull(ds);
assertNotNull(ds.getConnection());
}
}

42
core-java-modules/core-java-jndi/src/test/java/com/baeldung/jndi/exceptions/JndiExceptionsUnitTest.java Normal file
View File

@ -0,0 +1,42 @@
package com.baeldung.jndi.exceptions;
import org.junit.jupiter.api.MethodOrderer;
import org.junit.jupiter.api.Order;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.TestMethodOrder;
import org.springframework.jndi.JndiTemplate;
import org.springframework.mock.jndi.SimpleNamingContextBuilder;
import javax.naming.InitialContext;
import javax.naming.NameNotFoundException;
import javax.naming.NoInitialContextException;
import static org.junit.jupiter.api.Assertions.assertThrows;
@TestMethodOrder(MethodOrderer.OrderAnnotation.class)
public class JndiExceptionsUnitTest {
@Test
@Order(1)
void givenNoContext_whenLookupObject_thenThrowNoInitialContext() {
assertThrows(NoInitialContextException.class, () -> {
JndiTemplate jndiTemplate = new JndiTemplate();
InitialContext ctx = (InitialContext) jndiTemplate.getContext();
ctx.lookup("java:comp/env/jdbc/datasource");
}).printStackTrace();
}
@Test
@Order(2)
void givenEmptyContext_whenLookupNotBounds_thenThrowNameNotFound() {
assertThrows(NameNotFoundException.class, () -> {
SimpleNamingContextBuilder builder = new SimpleNamingContextBuilder();
builder.activate();
JndiTemplate jndiTemplate = new JndiTemplate();
InitialContext ctx = (InitialContext) jndiTemplate.getContext();
ctx.lookup("badJndiName");
}).printStackTrace();
}
}

3
core-java-modules/core-java-networking-2/README.md Normal file
View File

@ -0,0 +1,3 @@
### Relevant Articles
- [Checking if a URL Exists in Java](https://www.baeldung.com/java-check-url-exists)

2
core-java-modules/core-java-os/README.md
View File

@ -7,4 +7,4 @@ This module uses Java 9, so make sure to have the JDK 9 installed to run it.
- [Java 9 Process API Improvements](http://www.baeldung.com/java-9-process-api)
- [Guide to java.lang.Process API](https://www.baeldung.com/java-process-api)
- [Guide to java.lang.ProcessBuilder API](https://www.baeldung.com/java-lang-processbuilder-api)
- [Get the Current Working Directory in Java](https://www.baeldung.com/java-current-directory)

23
java-math/src/main/java/com/baeldung/matrices/HomemadeMatrix.java Normal file
View File

@ -0,0 +1,23 @@
package com.baeldung.matrices;
public class HomemadeMatrix {
public static double[][] multiplyMatrices(double[][] firstMatrix, double[][] secondMatrix) {
double[][] result = new double[firstMatrix.length][secondMatrix[0].length];
for (int row = 0; row < result.length; row++) {
for (int col = 0; col < result[row].length; col++) {
result[row][col] = multiplyMatricesCell(firstMatrix, secondMatrix, row, col);
}
}
return result;
}
private static double multiplyMatricesCell(double[][] firstMatrix, double[][] secondMatrix, int row, int col) {
double cell = 0;
for (int i = 0; i < secondMatrix.length; i++) {
cell += firstMatrix[row][i] * secondMatrix[i][col];
}
return cell;
}
}

31
java-math/src/test/java/com/baeldung/algorithms/logarithm/LogarithmUnitTest.java Normal file
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@ -0,0 +1,31 @@
package com.baeldung.algorithms.logarithm;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.Test;
public class LogarithmUnitTest {
@Test
public void givenLog10_shouldReturnValidResults() {
assertEquals(Math.log10(100), 2);
assertEquals(Math.log10(1000), 3);
}
@Test
public void givenLogE_shouldReturnValidResults() {
assertEquals(Math.log(Math.E), 1);
assertEquals(Math.log(10), 2.30258, 0.00001);
}
@Test
public void givenCustomLog_shouldReturnValidResults() {
assertEquals(customLog(2, 256), 8);
assertEquals(customLog(10, 100), 2);
}
private static double customLog(double base, double logNumber) {
return Math.log(logNumber) / Math.log(base);
}
}

79
java-math/src/test/java/com/baeldung/matrices/MatrixMultiplicationBenchmarking.java
View File

@ -1,9 +1,84 @@
package com.baeldung.matrices;
import cern.colt.matrix.DoubleFactory2D;
import cern.colt.matrix.DoubleMatrix2D;
import cern.colt.matrix.linalg.Algebra;
import org.apache.commons.math3.linear.Array2DRowRealMatrix;
import org.apache.commons.math3.linear.RealMatrix;
import org.ejml.simple.SimpleMatrix;
import org.la4j.Matrix;
import org.la4j.matrix.dense.Basic2DMatrix;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.factory.Nd4j;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;
import java.util.concurrent.TimeUnit;
public class MatrixMultiplicationBenchmarking {
public static void main(String[] args) throws Exception {
org.openjdk.jmh.Main.main(args);
Options opt = new OptionsBuilder()
.include(MatrixMultiplicationBenchmarking.class.getSimpleName())
.mode(Mode.AverageTime)
.forks(2)
.warmupIterations(5)
.measurementIterations(10)
.timeUnit(TimeUnit.MICROSECONDS)
.build();
new Runner(opt).run();
}
}
@Benchmark
public Object homemadeMatrixMultiplication(MatrixProvider matrixProvider) {
return HomemadeMatrix.multiplyMatrices(matrixProvider.getFirstMatrix(), matrixProvider.getSecondMatrix());
}
@Benchmark
public Object ejmlMatrixMultiplication(MatrixProvider matrixProvider) {
SimpleMatrix firstMatrix = new SimpleMatrix(matrixProvider.getFirstMatrix());
SimpleMatrix secondMatrix = new SimpleMatrix(matrixProvider.getSecondMatrix());
return firstMatrix.mult(secondMatrix);
}
@Benchmark
public Object apacheCommonsMatrixMultiplication(MatrixProvider matrixProvider) {
RealMatrix firstMatrix = new Array2DRowRealMatrix(matrixProvider.getFirstMatrix());
RealMatrix secondMatrix = new Array2DRowRealMatrix(matrixProvider.getSecondMatrix());
return firstMatrix.multiply(secondMatrix);
}
@Benchmark
public Object la4jMatrixMultiplication(MatrixProvider matrixProvider) {
Matrix firstMatrix = new Basic2DMatrix(matrixProvider.getFirstMatrix());
Matrix secondMatrix = new Basic2DMatrix(matrixProvider.getSecondMatrix());
return firstMatrix.multiply(secondMatrix);
}
@Benchmark
public Object nd4jMatrixMultiplication(MatrixProvider matrixProvider) {
INDArray firstMatrix = Nd4j.create(matrixProvider.getFirstMatrix());
INDArray secondMatrix = Nd4j.create(matrixProvider.getSecondMatrix());
return firstMatrix.mmul(secondMatrix);
}
@Benchmark
public Object coltMatrixMultiplication(MatrixProvider matrixProvider) {
DoubleFactory2D doubleFactory2D = DoubleFactory2D.dense;
DoubleMatrix2D firstMatrix = doubleFactory2D.make(matrixProvider.getFirstMatrix());
DoubleMatrix2D secondMatrix = doubleFactory2D.make(matrixProvider.getSecondMatrix());
Algebra algebra = new Algebra();
return algebra.mult(firstMatrix, secondMatrix);
}
}

33
java-math/src/test/java/com/baeldung/matrices/MatrixProvider.java Normal file
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@ -0,0 +1,33 @@
package com.baeldung.matrices;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;
@State(Scope.Benchmark)
public class MatrixProvider {
private double[][] firstMatrix;
private double[][] secondMatrix;
public MatrixProvider() {
firstMatrix =
new double[][] {
new double[] {1d, 5d},
new double[] {2d, 3d},
new double[] {1d ,7d}
};
secondMatrix =
new double[][] {
new double[] {1d, 2d, 3d, 7d},
new double[] {5d, 2d, 8d, 1d}
};
}
public double[][] getFirstMatrix() {
return firstMatrix;
}
public double[][] getSecondMatrix() {
return secondMatrix;
}
}

10
java-math/src/test/java/com/baeldung/matrices/apache/RealMatrixUnitTest.java
View File

@ -7,15 +7,10 @@ import org.openjdk.jmh.annotations.*;
import static org.assertj.core.api.Assertions.assertThat;
@BenchmarkMode(Mode.AverageTime)
@Fork(value = 2)
@Warmup(iterations = 5)
@Measurement(iterations = 10)
public class RealMatrixUnitTest {
class RealMatrixUnitTest {
@Test
@Benchmark
public void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
RealMatrix firstMatrix = new Array2DRowRealMatrix(
new double[][] {
new double[] {1d, 5d},
@ -43,5 +38,4 @@ public class RealMatrixUnitTest {
assertThat(actual).isEqualTo(expected);
}
}

11
java-math/src/test/java/com/baeldung/matrices/colt/DoubleMatrix2DUnitTest.java
View File

@ -8,15 +8,10 @@ import org.openjdk.jmh.annotations.*;
import static org.assertj.core.api.Assertions.assertThat;
@BenchmarkMode(Mode.AverageTime)
@Fork(value = 2)
@Warmup(iterations = 5)
@Measurement(iterations = 10)
public class DoubleMatrix2DUnitTest {
class DoubleMatrix2DUnitTest {
@Test
@Benchmark
public void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
DoubleFactory2D doubleFactory2D = DoubleFactory2D.dense;
DoubleMatrix2D firstMatrix = doubleFactory2D.make(
@ -48,4 +43,4 @@ public class DoubleMatrix2DUnitTest {
assertThat(actual).isEqualTo(expected);
}
}
}

11
java-math/src/test/java/com/baeldung/matrices/ejml/SimpleMatrixUnitTest.java
View File

@ -6,15 +6,10 @@ import org.openjdk.jmh.annotations.*;
import static org.assertj.core.api.Assertions.assertThat;
@BenchmarkMode(Mode.AverageTime)
@Fork(value = 2)
@Warmup(iterations = 5)
@Measurement(iterations = 10)
public class SimpleMatrixUnitTest {
class SimpleMatrixUnitTest {
@Test
@Benchmark
public void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
SimpleMatrix firstMatrix = new SimpleMatrix(
new double[][] {
new double[] {1d, 5d},
@ -43,4 +38,4 @@ public class SimpleMatrixUnitTest {
assertThat(actual).matches(m -> m.isIdentical(expected, 0d));
}
}
}

12
java-math/src/test/java/com/baeldung/matrices/homemade/HomemadeMatrixUnitTest.java
View File

@ -5,15 +5,10 @@ import org.openjdk.jmh.annotations.*;
import static org.assertj.core.api.Assertions.assertThat;
@BenchmarkMode(Mode.AverageTime)
@Fork(value = 2)
@Warmup(iterations = 5)
@Measurement(iterations = 10)
public class HomemadeMatrixUnitTest {
class HomemadeMatrixUnitTest {
@Test
@Benchmark
public void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
double[][] firstMatrix = {
new double[]{1d, 5d},
new double[]{2d, 3d},
@ -55,4 +50,5 @@ public class HomemadeMatrixUnitTest {
}
return cell;
}
}
}

11
java-math/src/test/java/com/baeldung/matrices/la4j/Basic2DMatrixUnitTest.java
View File

@ -7,15 +7,10 @@ import org.openjdk.jmh.annotations.*;
import static org.assertj.core.api.Assertions.assertThat;
@BenchmarkMode(Mode.AverageTime)
@Fork(value = 2)
@Warmup(iterations = 5)
@Measurement(iterations = 10)
public class Basic2DMatrixUnitTest {
class Basic2DMatrixUnitTest {
@Test
@Benchmark
public void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
Matrix firstMatrix = new Basic2DMatrix(
new double[][]{
new double[]{1d, 5d},
@ -44,4 +39,4 @@ public class Basic2DMatrixUnitTest {
assertThat(actual).isEqualTo(expected);
}
}
}

10
java-math/src/test/java/com/baeldung/matrices/nd4j/INDArrayUnitTest.java
View File

@ -7,14 +7,10 @@ import org.openjdk.jmh.annotations.*;
import static org.assertj.core.api.Assertions.assertThat;
@BenchmarkMode(Mode.AverageTime)
@Fork(value = 2)
@Warmup(iterations = 5)
@Measurement(iterations = 10)
public class INDArrayUnitTest {
class INDArrayUnitTest {
@Test
public void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
INDArray firstMatrix = Nd4j.create(
new double[][]{
new double[]{1d, 5d},
@ -43,4 +39,4 @@ public class INDArrayUnitTest {
assertThat(actual).isEqualTo(expected);
}
}
}

2
java-numbers-2/README.md Normal file
View File

@ -0,0 +1,2 @@
## Relevant Articles
- [Lossy Conversion in Java](https://www.baeldung.com/java-lossy-conversion)

1
java-strings-2/README.md
View File

@ -23,3 +23,4 @@
- [Java Multi-line String](https://www.baeldung.com/java-multiline-string)
- [Checking If a String Is a Repeated Substring](https://www.baeldung.com/java-repeated-substring)
- [How to Reverse a String in Java](https://www.baeldung.com/java-reverse-string)
- [String toLowerCase and toUpperCase Methods in Java](https://www.baeldung.com/java-string-convert-case)

1
jee-kotlin/README.md
View File

@ -1 +1,2 @@
### Relevant Articles:
- [Java EE Application with Kotlin](https://www.baeldung.com/java-ee-kotlin-app)

1
kotlin-quasar/README.md
View File

@ -1,3 +1,4 @@
### Relevant Articles
- [Introduction to Quasar in Kotlin](https://www.baeldung.com/kotlin-quasar)
- [Advanced Quasar Usage for Kotlin](https://www.baeldung.com/kotlin-quasar-advanced)

5
libraries-data-3/README.md Normal file
View File

@ -0,0 +1,5 @@
### Relevant articles
- [Parsing YAML with SnakeYAML](http://www.baeldung.com/java-snake-yaml)
- [Guide to JMapper](https://www.baeldung.com/jmapper)
- [An Introduction to SuanShu](https://www.baeldung.com/suanshu)
- [Intro to Derive4J](https://www.baeldung.com/derive4j)

1
libraries-data-3/log4j.properties Normal file
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@ -0,0 +1 @@
log4j.rootLogger=INFO, stdout

55
libraries-data-3/pom.xml Normal file
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@ -0,0 +1,55 @@
<?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>
<artifactId>libraries-data-3</artifactId>
<name>libraries-data-3</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.yaml</groupId>
<artifactId>snakeyaml</artifactId>
<version>${snakeyaml.version}</version>
</dependency>
<dependency>
<groupId>com.googlecode.jmapper-framework</groupId>
<artifactId>jmapper-core</artifactId>
<version>${jmapper.version}</version>
</dependency>
<dependency>
<groupId>com.numericalmethod</groupId>
<artifactId>suanshu</artifactId>
<version>${suanshu.version}</version>
</dependency>
<dependency>
<groupId>org.derive4j</groupId>
<artifactId>derive4j</artifactId>
<version>${derive4j.version}</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>nm-repo</id>
<name>Numerical Method's Maven Repository</name>
<url>http://repo.numericalmethod.com/maven/</url>
<layout>default</layout>
</repository>
</repositories>
<properties>
<snakeyaml.version>1.21</snakeyaml.version>
<jmapper.version>1.6.0.1</jmapper.version>
<suanshu.version>4.0.0</suanshu.version>
<derive4j.version>1.1.0</derive4j.version>
</properties>
</project>

0
libraries/src/main/java/com/baeldung/derive4j/adt/Either.java → libraries-data-3/src/main/java/com/baeldung/derive4j/adt/Either.java
View File

0
libraries/src/main/java/com/baeldung/derive4j/lazy/LazyRequest.java → libraries-data-3/src/main/java/com/baeldung/derive4j/lazy/LazyRequest.java
View File

0
libraries/src/main/java/com/baeldung/derive4j/pattern/HTTPRequest.java → libraries-data-3/src/main/java/com/baeldung/derive4j/pattern/HTTPRequest.java
View File

0
libraries/src/main/java/com/baeldung/derive4j/pattern/HTTPResponse.java → libraries-data-3/src/main/java/com/baeldung/derive4j/pattern/HTTPResponse.java
View File

0
libraries/src/main/java/com/baeldung/derive4j/pattern/HTTPServer.java → libraries-data-3/src/main/java/com/baeldung/derive4j/pattern/HTTPServer.java
View File

0
libraries-data/src/main/java/com/baeldung/jmapper/User.java → libraries-data-3/src/main/java/com/baeldung/jmapper/User.java
View File

0
libraries-data/src/main/java/com/baeldung/jmapper/UserDto.java → libraries-data-3/src/main/java/com/baeldung/jmapper/UserDto.java
View File

0
libraries-data/src/main/java/com/baeldung/jmapper/UserDto1.java → libraries-data-3/src/main/java/com/baeldung/jmapper/UserDto1.java
View File

0
libraries-data/src/main/java/com/baeldung/jmapper/relational/User.java → libraries-data-3/src/main/java/com/baeldung/jmapper/relational/User.java
View File

0
libraries-data/src/main/java/com/baeldung/jmapper/relational/UserDto1.java → libraries-data-3/src/main/java/com/baeldung/jmapper/relational/UserDto1.java
View File

0
libraries-data/src/main/java/com/baeldung/jmapper/relational/UserDto2.java → libraries-data-3/src/main/java/com/baeldung/jmapper/relational/UserDto2.java
View File

0
libraries/src/main/java/com/baeldung/snakeyaml/Address.java → libraries-data-3/src/main/java/com/baeldung/snakeyaml/Address.java
View File

0
libraries/src/main/java/com/baeldung/snakeyaml/Contact.java → libraries-data-3/src/main/java/com/baeldung/snakeyaml/Contact.java
View File

0
libraries/src/main/java/com/baeldung/snakeyaml/Customer.java → libraries-data-3/src/main/java/com/baeldung/snakeyaml/Customer.java
View File

0
libraries/src/main/java/com/baeldung/suanshu/SuanShuMath.java → libraries-data-3/src/main/java/com/baeldung/suanshu/SuanShuMath.java
View File

10
libraries-data-3/src/main/resources/user_jmapper.xml Normal file
View File

@ -0,0 +1,10 @@
<jmapper>
<class name="com.baeldung.jmapper.UserDto">
<attribute name="id">
<value name="id"/>
</attribute>
<attribute name="username">
<value name="email"/>
</attribute>
</class>
</jmapper>

5
libraries-data-3/src/main/resources/user_jmapper1.xml Normal file
View File

@ -0,0 +1,5 @@
<jmapper>
<class name="com.baeldung.jmapper.UserDto1">
<global/>
</class>
</jmapper>

21
libraries-data-3/src/main/resources/user_jmapper2.xml Normal file
View File

@ -0,0 +1,21 @@
<jmapper>
<class name="com.baeldung.jmapper.relational.User">
<attribute name="id">
<value name="id"/>
<classes>
<class name="com.baeldung.jmapper.relational.UserDto1"/>
<class name="com.baeldung.jmapper.relational.UserDto2"/>
</classes>
</attribute>
<attribute name="email">
<attributes>
<attribute name="username"/>
<attribute name="email"/>
</attributes>
<classes>
<class name="com.baeldung.jmapper.relational.UserDto1"/>
<class name="com.baeldung.jmapper.relational.UserDto2"/>
</classes>
</attribute>
</class>
</jmapper>

0
libraries/src/test/java/com/baeldung/derive4j/adt/EitherUnitTest.java → libraries-data-3/src/test/java/com/baeldung/derive4j/adt/EitherUnitTest.java
View File

0
libraries/src/test/java/com/baeldung/derive4j/lazy/LazyRequestUnitTest.java → libraries-data-3/src/test/java/com/baeldung/derive4j/lazy/LazyRequestUnitTest.java
View File

0
libraries/src/test/java/com/baeldung/derive4j/pattern/HTTPRequestUnitTest.java → libraries-data-3/src/test/java/com/baeldung/derive4j/pattern/HTTPRequestUnitTest.java
View File

0
libraries-data/src/test/java/com/baeldung/jmapper/JMapperIntegrationTest.java → libraries-data-3/src/test/java/com/baeldung/jmapper/JMapperIntegrationTest.java
View File

0
libraries-data/src/test/java/com/baeldung/jmapper/JMapperRelationalIntegrationTest.java → libraries-data-3/src/test/java/com/baeldung/jmapper/JMapperRelationalIntegrationTest.java
View File

0
libraries/src/test/java/com/baeldung/snakeyaml/JavaToYAMLSerializationUnitTest.java → libraries-data-3/src/test/java/com/baeldung/snakeyaml/JavaToYAMLSerializationUnitTest.java
View File

0
libraries/src/test/java/com/baeldung/snakeyaml/YAMLToJavaDeserialisationUnitTest.java → libraries-data-3/src/test/java/com/baeldung/snakeyaml/YAMLToJavaDeserialisationUnitTest.java
View File

3
libraries-data-3/src/test/resources/yaml/customer.yaml Normal file
View File

@ -0,0 +1,3 @@
firstName: "John"
lastName: "Doe"
age: 20

7
libraries-data-3/src/test/resources/yaml/customer_with_contact_details.yaml Normal file
View File

@ -0,0 +1,7 @@
firstName: "John"
lastName: "Doe"
age: 31
contactDetails:
- { type: "mobile", number: 123456789}
- { type: "landline", number: 456786868}

13
libraries-data-3/src/test/resources/yaml/customer_with_contact_details_and_address.yaml Normal file
View File

@ -0,0 +1,13 @@
firstName: "John"
lastName: "Doe"
age: 31
contactDetails:
- type: "mobile"
number: 123456789
- type: "landline"
number: 456786868
homeAddress:
line: "Xyz, DEF Street"
city: "City Y"
state: "State Y"
zip: 345657

6
libraries-data-3/src/test/resources/yaml/customer_with_contact_details_and_tags.yaml Normal file
View File

@ -0,0 +1,6 @@
firstName: "John"
lastName: "Doe"
age: 31
contactDetails:
- !contact { type: "mobile", number: 123456789}
- !contact { type: "landline", number: 456786868}

4
libraries-data-3/src/test/resources/yaml/customer_with_type.yaml Normal file
View File

@ -0,0 +1,4 @@
!!com.baeldung.snakeyaml.Customer
firstName: "John"
lastName: "Doe"
age: 20

8
libraries-data-3/src/test/resources/yaml/customers.yaml Normal file
View File

@ -0,0 +1,8 @@
---
firstName: "John"
lastName: "Doe"
age: 20
---
firstName: "Jack"
lastName: "Jones"
age: 25

1
libraries-data/README.md
View File

@ -9,7 +9,6 @@
- [Introduction to JCache](http://www.baeldung.com/jcache)
- [A Guide to Apache Ignite](http://www.baeldung.com/apache-ignite)
- [Apache Ignite with Spring Data](http://www.baeldung.com/apache-ignite-spring-data)
- [Guide to JMapper](https://www.baeldung.com/jmapper)
- [A Guide to Apache Crunch](https://www.baeldung.com/apache-crunch)
- [Intro to Apache Storm](https://www.baeldung.com/apache-storm)
- [Guide to Ebean ORM](https://www.baeldung.com/ebean-orm)

8
libraries-data/pom.xml
View File

@ -141,12 +141,7 @@
<artifactId>hazelcast</artifactId>
<version>${hazelcast.version}</version>
</dependency>
<dependency>
<groupId>com.googlecode.jmapper-framework</groupId>
<artifactId>jmapper-core</artifactId>
<version>${jmapper.version}</version>
</dependency>
<!-- crunch project -->
<dependency>
<groupId>org.apache.crunch</groupId>
@ -460,7 +455,6 @@
<datanucleus-maven-plugin.version>5.0.2</datanucleus-maven-plugin.version>
<datanucleus-xml.version>5.0.0-release</datanucleus-xml.version>
<datanucleus-jdo-query.version>5.0.4</datanucleus-jdo-query.version>
<jmapper.version>1.6.0.1</jmapper.version>
<org.apache.crunch.crunch-core.version>0.15.0</org.apache.crunch.crunch-core.version>
<org.apache.hadoop.hadoop-client>2.2.0</org.apache.hadoop.hadoop-client>
<ebean.version>11.22.4</ebean.version>

4
libraries-http/README.md
View File

@ -5,3 +5,7 @@
- [A Guide to Google-Http-Client](http://www.baeldung.com/google-http-client)
- [Asynchronous HTTP with async-http-client in Java](http://www.baeldung.com/async-http-client)
- [WebSockets with AsyncHttpClient](http://www.baeldung.com/async-http-client-websockets)
- [Integrating Retrofit with RxJava](http://www.baeldung.com/retrofit-rxjava)
- [Introduction to Retrofit](http://www.baeldung.com/retrofit)
- [A Guide to Unirest](http://www.baeldung.com/unirest)
- [Creating REST Microservices with Javalin](http://www.baeldung.com/javalin-rest-microservices)

56
libraries-http/pom.xml
View File

@ -44,6 +44,23 @@
<version>${googleclient.version}</version>
</dependency>
<!-- Retrofit -->
<dependency>
<groupId>com.squareup.retrofit2</groupId>
<artifactId>retrofit</artifactId>
<version>${retrofit.version}</version>
</dependency>
<dependency>
<groupId>com.squareup.retrofit2</groupId>
<artifactId>converter-gson</artifactId>
<version>${retrofit.version}</version>
</dependency>
<dependency>
<groupId>com.squareup.retrofit2</groupId>
<artifactId>adapter-rxjava</artifactId>
<version>${retrofit.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.asynchttpclient/async-http-client -->
<dependency>
<groupId>org.asynchttpclient</groupId>
@ -69,13 +86,52 @@
<version>${com.squareup.okhttp3.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.mashape.unirest</groupId>
<artifactId>unirest-java</artifactId>
<version>${unirest.version}</version>
</dependency>
<!-- javalin -->
<dependency>
<groupId>io.javalin</groupId>
<artifactId>javalin</artifactId>
<version>${javalin.version}</version>
</dependency>
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>logging-interceptor</artifactId>
<version>${logging-interceptor.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>${httpclient.version}</version>
<exclusions>
<exclusion>
<artifactId>commons-logging</artifactId>
<groupId>commons-logging</groupId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<properties>
<httpclient.version>4.5.3</httpclient.version>
<jackson.version>2.9.8</jackson.version>
<assertj.version>3.6.2</assertj.version>
<com.squareup.okhttp3.version>3.14.2</com.squareup.okhttp3.version>
<googleclient.version>1.23.0</googleclient.version>
<async.http.client.version>2.2.0</async.http.client.version>
<retrofit.version>2.3.0</retrofit.version>
<unirest.version>1.4.9</unirest.version>
<javalin.version>1.6.0</javalin.version>
<logging-interceptor.version>3.9.0</logging-interceptor.version>
</properties>
</project>

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libraries/src/main/java/com/baeldung/javalin/JavalinApp.java → libraries-http/src/main/java/com/baeldung/javalin/JavalinApp.java
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libraries/src/main/java/com/baeldung/javalin/User/User.java → libraries-http/src/main/java/com/baeldung/javalin/User/User.java
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libraries/src/main/java/com/baeldung/javalin/User/UserController.java → libraries-http/src/main/java/com/baeldung/javalin/User/UserController.java
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libraries/src/main/java/com/baeldung/javalin/User/UserDao.java → libraries-http/src/main/java/com/baeldung/javalin/User/UserDao.java
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libraries/src/main/java/com/baeldung/retrofit/basic/GitHubBasicApi.java → libraries-http/src/main/java/com/baeldung/retrofit/basic/GitHubBasicApi.java
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libraries/src/main/java/com/baeldung/retrofit/basic/GitHubBasicApp.java → libraries-http/src/main/java/com/baeldung/retrofit/basic/GitHubBasicApp.java
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libraries/src/main/java/com/baeldung/retrofit/basic/GitHubBasicService.java → libraries-http/src/main/java/com/baeldung/retrofit/basic/GitHubBasicService.java
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libraries/src/main/java/com/baeldung/retrofit/models/Contributor.java → libraries-http/src/main/java/com/baeldung/retrofit/models/Contributor.java
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libraries/src/main/java/com/baeldung/retrofit/models/Repository.java → libraries-http/src/main/java/com/baeldung/retrofit/models/Repository.java
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libraries/src/main/java/com/baeldung/retrofit/rx/GitHubRxApi.java → libraries-http/src/main/java/com/baeldung/retrofit/rx/GitHubRxApi.java
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libraries/src/main/java/com/baeldung/retrofit/rx/GitHubRxApp.java → libraries-http/src/main/java/com/baeldung/retrofit/rx/GitHubRxApp.java
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libraries/src/main/java/com/baeldung/retrofit/rx/GitHubRxService.java → libraries-http/src/main/java/com/baeldung/retrofit/rx/GitHubRxService.java
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libraries/src/main/java/com/baeldung/retrofitguide/GitHubServiceGenerator.java → libraries-http/src/main/java/com/baeldung/retrofitguide/GitHubServiceGenerator.java
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libraries/src/main/java/com/baeldung/retrofitguide/Main.java → libraries-http/src/main/java/com/baeldung/retrofitguide/Main.java
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libraries/src/main/java/com/baeldung/retrofitguide/User.java → libraries-http/src/main/java/com/baeldung/retrofitguide/User.java
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libraries/src/main/java/com/baeldung/retrofitguide/UserService.java → libraries-http/src/main/java/com/baeldung/retrofitguide/UserService.java
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libraries/src/test/java/com/baeldung/retrofit/basic/GitHubBasicApiLiveTest.java → libraries-http/src/test/java/com/baeldung/retrofit/basic/GitHubBasicApiLiveTest.java
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