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Merge branch 'eugenp:master' into master

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Wynn Teo 2024-03-22 08:07:54 +08:00 committed by GitHub
parent 8a746c22ce c0b32401a0
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727 changed files with 7303 additions and 2066 deletions
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2
akka-modules/pom.xml
View File

@ -4,8 +4,8 @@
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>akka-modules</artifactId>
<name>akka-modules</name>
<packaging>pom</packaging>
<name>akka-modules</name>
<parent>
<artifactId>parent-modules</artifactId>

5
algorithms-modules/algorithms-miscellaneous-1/pom.xml
View File

@ -19,11 +19,6 @@
<artifactId>commons-math3</artifactId>
<version>${commons-math3.version}</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>

6
algorithms-modules/algorithms-miscellaneous-5/pom.xml
View File

@ -29,11 +29,7 @@
<artifactId>tradukisto</artifactId>
<version>${tradukisto.version}</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<!-- API, java.xml.bind module -->
<dependency>
<groupId>jakarta.xml.bind</groupId>

1
algorithms-modules/algorithms-miscellaneous-7/README.md
View File

@ -11,4 +11,5 @@
- [Find the Largest Prime Under the Given Number in Java](https://www.baeldung.com/java-largest-prime-lower-threshold)
- [Count the Number of Unique Digits in an Integer using Java](https://www.baeldung.com/java-int-count-unique-digits)
- [Generate Juggler Sequence in Java](https://www.baeldung.com/java-generate-juggler-sequence)
- [Finding the Parent of a Node in a Binary Search Tree with Java](https://www.baeldung.com/java-find-parent-node-binary-search-tree)
- More articles: [[<-- prev]](/algorithms-miscellaneous-6)

16
algorithms-modules/algorithms-miscellaneous-8/pom.xml Normal file
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@ -0,0 +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">
<modelVersion>4.0.0</modelVersion>
<artifactId>algorithms-miscellaneous-8</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>algorithms-miscellaneous-8</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>algorithms-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
</project>

0
algorithms-modules/algorithms-miscellaneous-7/src/test/java/com/baeldung/algorithms/vigenere/VigenereCipher.java → algorithms-modules/algorithms-miscellaneous-8/src/test/java/com/baeldung/algorithms/vigenere/VigenereCipher.java
View File

25
algorithms-modules/algorithms-miscellaneous-7/src/test/java/com/baeldung/algorithms/vigenere/VigenereCipherUnitTest.java → algorithms-modules/algorithms-miscellaneous-8/src/test/java/com/baeldung/algorithms/vigenere/VigenereCipherUnitTest.java
View File

@ -24,17 +24,17 @@ public class VigenereCipherUnitTest {
@Test
void encodeArticleTitle() {
VigenereCipher cipher = new VigenereCipher();
String output = cipher.encode("VEGENERE CIPHER IN JAVA", "BAELDUNG");
String output = cipher.encode("VIGENERE CIPHER IN JAVA", "BAELDUNG");
Assertions.assertEquals("XFLQRZFL EJUTIM WU LBAM", output);
Assertions.assertEquals("XJLQRZFL EJUTIM WU LBAM", output);
}
@Test
void encodeArticleTitleMoreCharacters() {
VigenereCipher cipher = new VigenereCipher("ABCDEFGHIJKLMNOPQRSTUVWXYZ ");
String output = cipher.encode("VEGENERE CIPHER IN JAVA", "BAELDUNG");
String output = cipher.encode("VIGENERE CIPHER IN JAVA", "BAELDUNG");
Assertions.assertEquals("XFLQRZELBDNALZEGKOEVEPO", output);
Assertions.assertEquals("XJLQRZELBDNALZEGKOEVEPO", output);
}
@Test
@ -56,8 +56,21 @@ public class VigenereCipherUnitTest {
@Test
void decodeArticleTitleMoreCharacters() {
VigenereCipher cipher = new VigenereCipher("ABCDEFGHIJKLMNOPQRSTUVWXYZ ");
String output = cipher.decode("XFLQRZELBDNALZEGKOEVEPO", "BAELDUNG");
String output = cipher.decode("XJLQRZELBDNALZEGKOEVEPO", "BAELDUNG");
Assertions.assertEquals("VEGENERE CIPHER IN JAVA", output);
Assertions.assertEquals("VIGENERE CIPHER IN JAVA", output);
}
@Test
void encodeDecodeBaeldung() {
VigenereCipher cipher = new VigenereCipher();
String input = "BAELDUNG";
String key = "HELLO";
String encoded = cipher.encode(input, key);
String decoded = cipher.decode(encoded, key);
Assertions.assertEquals(input, decoded);
}
}

3
algorithms-modules/pom.xml
View File

@ -22,6 +22,7 @@
<module>algorithms-miscellaneous-5</module>
<module>algorithms-miscellaneous-6</module>
<module>algorithms-miscellaneous-7</module>
<module>algorithms-miscellaneous-8</module>
<module>algorithms-searching</module>
<module>algorithms-sorting</module>
<module>algorithms-sorting-2</module>
@ -34,4 +35,4 @@
<tradukisto.version>1.0.1</tradukisto.version>
</properties>
</project>
</project>

2
apache-cxf-modules/cxf-spring/pom.xml
View File

@ -4,8 +4,8 @@
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>cxf-spring</artifactId>
<name>cxf-spring</name>
<packaging>war</packaging>
<name>cxf-spring</name>
<parent>
<groupId>com.baeldung</groupId>

3
apache-cxf-modules/pom.xml
View File

@ -5,8 +5,9 @@
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-cxf-modules</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>apache-cxf-modules</name>
<packaging>pom</packaging>
<name>apache-cxf-modules</name>
<parent>
<groupId>com.baeldung</groupId>

2
apache-cxf-modules/sse-jaxrs/pom.xml
View File

@ -4,8 +4,8 @@
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>sse-jaxrs</artifactId>
<name>sse-jaxrs</name>
<packaging>pom</packaging>
<name>sse-jaxrs</name>
<parent>
<groupId>com.baeldung</groupId>

2
apache-cxf-modules/sse-jaxrs/sse-jaxrs-server/pom.xml
View File

@ -4,8 +4,8 @@
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>sse-jaxrs-server</artifactId>
<name>sse-jaxrs-server</name>
<packaging>war</packaging>
<name>sse-jaxrs-server</name>
<parent>
<groupId>com.baeldung</groupId>

9
apache-httpclient4/pom.xml
View File

@ -5,8 +5,8 @@
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-httpclient4</artifactId>
<version>0.1-SNAPSHOT</version>
<name>apache-httpclient4</name>
<packaging>war</packaging>
<name>apache-httpclient4</name>
<parent>
<groupId>com.baeldung</groupId>
@ -176,12 +176,6 @@
<version>${jstl.version}</version>
<scope>runtime</scope>
</dependency>
<!-- util -->
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<!-- test scoped -->
<dependency>
<groupId>org.springframework</groupId>
@ -199,7 +193,6 @@
<filtering>true</filtering>
</resource>
</resources>
</build>
<profiles>

1
apache-kafka-2/README.md
View File

@ -16,3 +16,4 @@ You can build the project from the command line using: *mvn clean install*, or i
- [Introduction to Apache Kafka](https://www.baeldung.com/apache-kafka)
- [Ensuring Message Ordering in Kafka: Strategies and Configurations](https://www.baeldung.com/kafka-message-ordering)
- [Read Multiple Messages with Apache Kafka](https://www.baeldung.com/kafka-read-multiple-messages)
- [Creating a Kafka Listener Using the Consumer API](https://www.baeldung.com/kafka-create-listener-consumer-api)

9
apache-kafka-3/README.md Normal file
View File

@ -0,0 +1,9 @@
## Apache Kafka
This module contains articles about Apache Kafka.
##### Building the project
You can build the project from the command line using: *mvn clean install*, or in an IDE.
### Relevant Articles:

48
apache-kafka-3/pom.xml Normal file
View File

@ -0,0 +1,48 @@
<?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>apache-kafka-3</artifactId>
<name>apache-kafka-3</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>${kafka.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${org.slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.databind.version}</version>
</dependency>
</dependencies>
<properties>
<kafka.version>3.6.1</kafka.version>
<jackson.databind.version>2.15.2</jackson.databind.version>
</properties>
<profiles>
<profile>
<id>integration-jdk9-and-above</id>
</profile>
</profiles>
</project>

23
apache-kafka-3/src/main/java/com/baeldung/kafka/commitoffset/AsyncCommit.java Normal file
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@ -0,0 +1,23 @@
package com.baeldung.kafka.commitoffset;
import com.baeldung.kafka.commitoffset.config.KafkaConfigProperties;
import java.time.Duration;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
public class AsyncCommit {
public static void main(String[] args) {
KafkaConsumer<Long, String> consumer = new KafkaConsumer<>(KafkaConfigProperties.getProperties());
consumer.subscribe(KafkaConfigProperties.getTopic());
ConsumerRecords<Long, String> messages = consumer.poll(Duration.ofSeconds(10));
for (ConsumerRecord<Long, String> message : messages) {
// processed message
consumer.commitAsync();
}
}
}

26
apache-kafka-3/src/main/java/com/baeldung/kafka/commitoffset/AutomaticCommit.java Normal file
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@ -0,0 +1,26 @@
package com.baeldung.kafka.commitoffset;
import com.baeldung.kafka.commitoffset.config.KafkaConfigProperties;
import java.time.Duration;
import java.util.Properties;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
public class AutomaticCommit {
public static void main(String[] args) {
Properties properties = KafkaConfigProperties.getProperties();
properties.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, "true");
KafkaConsumer<Long, String> consumer = new KafkaConsumer<>(properties);
consumer.subscribe(KafkaConfigProperties.getTopic());
ConsumerRecords<Long, String> messages = consumer.poll(Duration.ofSeconds(10));
for (ConsumerRecord<Long, String> message : messages) {
// processed message
}
}
}

34
apache-kafka-3/src/main/java/com/baeldung/kafka/commitoffset/SpecificOffsetCommit.java Normal file
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@ -0,0 +1,34 @@
package com.baeldung.kafka.commitoffset;
import com.baeldung.kafka.commitoffset.config.KafkaConfigProperties;
import java.time.Duration;
import java.util.HashMap;
import java.util.Map;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.clients.consumer.OffsetAndMetadata;
import org.apache.kafka.common.TopicPartition;
public class SpecificOffsetCommit {
public static void main(String[] args) {
KafkaConsumer<Long, String> consumer = new KafkaConsumer<>(KafkaConfigProperties.getProperties());
consumer.subscribe(KafkaConfigProperties.getTopic());
Map<TopicPartition, OffsetAndMetadata> currentOffsets = new HashMap<>();
int messageProcessed = 0;
while (true) {
ConsumerRecords<Long, String> messages = consumer.poll(Duration.ofSeconds(10));
for (ConsumerRecord<Long, String> message : messages) {
// processed message
messageProcessed++;
currentOffsets.put(new TopicPartition(message.topic(), message.partition()), new OffsetAndMetadata(message.offset() + 1));
if (messageProcessed % 50 == 0) {
consumer.commitSync(currentOffsets);
}
}
}
}
}

23
apache-kafka-3/src/main/java/com/baeldung/kafka/commitoffset/SyncCommit.java Normal file
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@ -0,0 +1,23 @@
package com.baeldung.kafka.commitoffset;
import com.baeldung.kafka.commitoffset.config.KafkaConfigProperties;
import java.time.Duration;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
public class SyncCommit {
public static void main(String[] args) {
KafkaConsumer<Long, String> consumer = new KafkaConsumer<>(KafkaConfigProperties.getProperties());
consumer.subscribe(KafkaConfigProperties.getTopic());
ConsumerRecords<Long, String> messages = consumer.poll(Duration.ofSeconds(10));
for (ConsumerRecord<Long, String> message : messages) {
// processed message
consumer.commitSync();
}
}
}

31
apache-kafka-3/src/main/java/com/baeldung/kafka/commitoffset/config/KafkaConfigProperties.java Normal file
View File

@ -0,0 +1,31 @@
package com.baeldung.kafka.commitoffset.config;
import java.util.ArrayList;
import java.util.Properties;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.common.serialization.StringDeserializer;
/**
* @author amitkumar
*/
public class KafkaConfigProperties {
public static final String MY_TOPIC = "my-topic";
public static Properties getProperties() {
Properties props = new Properties();
props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, "false");
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
props.put(ConsumerConfig.GROUP_ID_CONFIG, "MyFirstConsumer");
props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class.getName());
props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class.getName());
return props;
}
public static ArrayList<String> getTopic() {
ArrayList<String> topics = new ArrayList<>();
topics.add(MY_TOPIC);
return topics;
}
}

11
apache-kafka-3/src/test/resources/logback.xml Normal file
View File

@ -0,0 +1,11 @@
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

5
apache-kafka/pom.xml
View File

@ -71,11 +71,6 @@
<version>${flink.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>org.awaitility</groupId>
<artifactId>awaitility</artifactId>

2
apache-libraries-2/README.md
View File

@ -1,3 +1,5 @@
## Relevant Articles
- [Understanding XSLT Processing in Java](https://www.baeldung.com/java-extensible-stylesheet-language-transformations)
- [Add Camel Route at Runtime in Java](https://www.baeldung.com/java-camel-dynamic-route)
- More articles: [[<-- prev]](../apache-libraries)

2
apache-libraries-2/pom.xml
View File

@ -24,14 +24,12 @@
<artifactId>camel-core</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-test-junit5</artifactId>
<version>${camel.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-main</artifactId>

2
apache-libraries/README.md
View File

@ -13,3 +13,5 @@ This module contains articles about various Apache libraries and utilities
- [Introduction to Apache Curator](https://www.baeldung.com/apache-curator)
- [A Quick Guide to Apache Geode](https://www.baeldung.com/apache-geode)
- [Guide To Solr in Java With Apache SolrJ](https://www.baeldung.com/apache-solrj)
- More articles: [[next -->]](../apache-libraries-2)

2
apache-spark/pom.xml
View File

@ -5,8 +5,8 @@
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-spark</artifactId>
<version>1.0-SNAPSHOT</version>
<name>apache-spark</name>
<packaging>jar</packaging>
<name>apache-spark</name>
<parent>
<groupId>com.baeldung</groupId>

2
apache-thrift/pom.xml
View File

@ -5,8 +5,8 @@
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-thrift</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>apache-thrift</name>
<packaging>pom</packaging>
<name>apache-thrift</name>
<parent>
<groupId>com.baeldung</groupId>

6
apache-velocity/pom.xml
View File

@ -5,8 +5,8 @@
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-velocity</artifactId>
<version>0.1-SNAPSHOT</version>
<name>apache-velocity</name>
<packaging>war</packaging>
<name>apache-velocity</name>
<parent>
<groupId>com.baeldung</groupId>
@ -28,7 +28,7 @@
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>${org.apache.httpcomponents.version}</version>
<version>${httpclient.version}</version>
<scope>test</scope>
<exclusions>
<exclusion>
@ -60,7 +60,7 @@
</build>
<properties>
<org.apache.httpcomponents.version>4.5.2</org.apache.httpcomponents.version>
<httpclient.version>4.5.2</httpclient.version>
<velocity-version>1.7</velocity-version>
<velocity-tools-version>2.0</velocity-tools-version>
</properties>

2
aws-modules/aws-dynamodb/pom.xml
View File

@ -5,8 +5,8 @@
<modelVersion>4.0.0</modelVersion>
<artifactId>aws-dynamodb</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>aws-dynamodb</name>
<packaging>jar</packaging>
<name>aws-dynamodb</name>
<parent>
<groupId>com.baeldung</groupId>

2
aws-modules/aws-lambda-modules/lambda-function/pom.xml
View File

@ -4,8 +4,8 @@
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>lambda-function</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>lambda-function</name>
<version>0.1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<parent>

2
aws-modules/aws-lambda-modules/pom.xml
View File

@ -4,8 +4,8 @@
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>aws-lambda-modules</artifactId>
<name>aws-lambda-modules</name>
<packaging>pom</packaging>
<name>aws-lambda-modules</name>
<parent>
<groupId>com.baeldung</groupId>

2
aws-modules/aws-lambda-modules/shipping-tracker-lambda/ShippingFunction/pom.xml
View File

@ -3,8 +3,8 @@
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>ShippingFunction</artifactId>
<version>1.0</version>
<name>ShippingFunction</name>
<version>1.0</version>
<packaging>jar</packaging>
<parent>

2
aws-modules/aws-lambda-modules/todo-reminder-lambda/ToDoFunction/pom.xml
View File

@ -4,8 +4,8 @@
<modelVersion>4.0.0</modelVersion>
<groupId>helloworld</groupId>
<artifactId>ToDoFunction</artifactId>
<version>1.0</version>
<name>ToDoFunction</name>
<version>1.0</version>
<packaging>jar</packaging>
<parent>

2
aws-modules/aws-miscellaneous/pom.xml
View File

@ -5,8 +5,8 @@
<modelVersion>4.0.0</modelVersion>
<artifactId>aws-miscellaneous</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>aws-miscellaneous</name>
<packaging>jar</packaging>
<name>aws-miscellaneous</name>
<parent>
<groupId>com.baeldung</groupId>

1
aws-modules/aws-s3/README.md
View File

@ -12,3 +12,4 @@ This module contains articles about Simple Storage Service (S3) on AWS
- [Update an Existing Amazon S3 Object Using Java](https://www.baeldung.com/java-update-amazon-s3-object)
- [How To Rename Files and Folders in Amazon S3](https://www.baeldung.com/java-amazon-s3-rename-files-folders)
- [Update an Existing Amazon S3 Object Using Java](https://www.baeldung.com/java-update-amazon-s3-object)
- [How to Mock Amazon S3 for Integration Test](https://www.baeldung.com/java-amazon-simple-storage-service-mock-testing)

4
aws-modules/aws-s3/pom.xml
View File

@ -5,8 +5,8 @@
<modelVersion>4.0.0</modelVersion>
<artifactId>aws-s3</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>aws-s3</name>
<packaging>jar</packaging>
<name>aws-s3</name>
<parent>
<groupId>com.baeldung</groupId>
@ -26,7 +26,6 @@
<version>${aws.java.sdk.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
@ -56,7 +55,6 @@
<version>${com.adobe.testing.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.testcontainers</groupId>
<artifactId>junit-jupiter</artifactId>

20
aws-modules/pom.xml
View File

@ -4,6 +4,7 @@
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>aws-modules</artifactId>
<packaging>pom</packaging>
<name>aws-modules</name>
<parent>
@ -12,16 +13,6 @@
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-dynamodb</artifactId>
<version>1.12.523</version>
<scope>compile</scope>
</dependency>
</dependencies>
<packaging>pom</packaging>
<modules>
<module>aws-app-sync</module>
<module>aws-dynamodb</module>
@ -31,6 +22,15 @@
<module>aws-s3</module>
</modules>
<dependencies>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-dynamodb</artifactId>
<version>1.12.523</version>
<scope>compile</scope>
</dependency>
</dependencies>
<properties>
<aws-java-sdk.version>1.12.331</aws-java-sdk.version>
<aws-java-sdk-v2.version>2.24.9</aws-java-sdk-v2.version>

2
azure/pom.xml
View File

@ -5,8 +5,8 @@
<modelVersion>4.0.0</modelVersion>
<artifactId>azure</artifactId>
<version>0.1</version>
<name>azure</name>
<packaging>war</packaging>
<name>azure</name>
<description>Demo project for Spring Boot on Azure</description>
<parent>

2
checker-framework/pom.xml
View File

@ -5,8 +5,8 @@
<modelVersion>4.0.0</modelVersion>
<artifactId>checker-framework</artifactId>
<version>1.0-SNAPSHOT</version>
<name>checker-framework</name>
<packaging>jar</packaging>
<name>checker-framework</name>
<parent>
<groupId>com.baeldung</groupId>

2
core-java-modules/core-java-10/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-10</artifactId>
<name>core-java-10</name>
<packaging>jar</packaging>
<name>core-java-10</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

7
core-java-modules/core-java-11-2/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-11-2</artifactId>
<name>core-java-11-2</name>
<packaging>jar</packaging>
<name>core-java-11-2</name>
<parent>
<groupId>com.baeldung</groupId>
@ -15,11 +15,6 @@
</parent>
<dependencies>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>org.mock-server</groupId>
<artifactId>mockserver-junit-jupiter</artifactId>

2
core-java-modules/core-java-11-3/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-11-3</artifactId>
<name>core-java-11-3</name>
<packaging>jar</packaging>
<name>core-java-11-3</name>
<parent>
<groupId>com.baeldung</groupId>

7
core-java-modules/core-java-11/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-11</artifactId>
<name>core-java-11</name>
<packaging>jar</packaging>
<name>core-java-11</name>
<parent>
<groupId>com.baeldung</groupId>
@ -15,11 +15,6 @@
</parent>
<dependencies>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>

2
core-java-modules/core-java-12/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-12</artifactId>
<name>core-java-12</name>
<packaging>jar</packaging>
<name>core-java-12</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-13/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-13</artifactId>
<name>core-java-13</name>
<packaging>jar</packaging>
<name>core-java-13</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-14/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-14</artifactId>
<name>core-java-14</name>
<packaging>jar</packaging>
<name>core-java-14</name>
<parent>
<groupId>com.baeldung</groupId>

3
core-java-modules/core-java-15/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-15</artifactId>
<name>core-java-15</name>
<packaging>jar</packaging>
<name>core-java-15</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>
@ -13,7 +13,6 @@
<version>0.0.1-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>

2
core-java-modules/core-java-16/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-16</artifactId>
<name>core-java-16</name>
<packaging>jar</packaging>
<name>core-java-16</name>
<parent>
<groupId>com.baeldung</groupId>

2
core-java-modules/core-java-17/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-17</artifactId>
<name>core-java-17</name>
<packaging>jar</packaging>
<name>core-java-17</name>
<parent>
<groupId>com.baeldung</groupId>

2
core-java-modules/core-java-18/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-18</artifactId>
<name>core-java-18</name>
<packaging>jar</packaging>
<name>core-java-18</name>
<parent>
<groupId>com.baeldung</groupId>

2
core-java-modules/core-java-8-datetime-2/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-8-datetime-2</artifactId>
<name>core-java-8-datetime-2</name>
<packaging>jar</packaging>
<name>core-java-8-datetime-2</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

45
core-java-modules/core-java-8-datetime-2/src/test/java/com/baeldung/checkiftimebetweentwotimes/CheckIfTimeBetweenTwoTimesUnitTest.java Normal file
View File

@ -0,0 +1,45 @@
package com.baeldung.checkiftimebetweentwotimes;
import org.junit.Test;
import java.time.LocalTime;
import java.util.Calendar;
import java.util.Date;
import static org.junit.Assert.assertTrue;
public class CheckIfTimeBetweenTwoTimesUnitTest {
private LocalTime startTime = LocalTime.parse("09:00:00");
private LocalTime endTime = LocalTime.parse("17:00:00");
private LocalTime targetTime = LocalTime.parse("12:30:00");
@Test
public void givenLocalTime_whenUsingIsAfterIsBefore_thenTimeIsBetween() {
assertTrue(!targetTime.isBefore(startTime) && !targetTime.isAfter(endTime));
}
@Test
public void givenLocalTime_whenUsingCompareTo_thenTimeIsBetween() {
assertTrue(targetTime.compareTo(startTime) >= 0 && targetTime.compareTo(endTime) <= 0);
}
@Test
public void givenDate_whenUsingAfterBefore_thenTimeIsBetween() {
Calendar startCalendar = Calendar.getInstance();
startCalendar.set(Calendar.HOUR_OF_DAY, 9);
startCalendar.set(Calendar.MINUTE, 0);
Date startTime = startCalendar.getTime();
Calendar endCalendar = Calendar.getInstance();
endCalendar.set(Calendar.HOUR_OF_DAY, 17);
endCalendar.set(Calendar.MINUTE, 0);
Date endTime = endCalendar.getTime();
Calendar targetCalendar = Calendar.getInstance();
targetCalendar.set(Calendar.HOUR_OF_DAY, 12);
targetCalendar.set(Calendar.MINUTE, 30);
Date targetTime = targetCalendar.getTime();
assertTrue(!targetTime.before(startTime) && !targetTime.after(endTime));
}
}

2
core-java-modules/core-java-8-datetime/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-8-datetime</artifactId>
<name>core-java-8-datetime</name>
<packaging>jar</packaging>
<name>core-java-8-datetime</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

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

@ -5,7 +5,7 @@ This module contains articles about Project Jigsaw and the Java Platform Module
### Relevant Articles:
- [Introduction to Project Jigsaw](http://www.baeldung.com/project-jigsaw-java-modularity)
- [A Guide to Java 9 Modularity](https://www.baeldung.com/java-9-modularity)
- [A Guide to Java Modularity](https://www.baeldung.com/java-modularity)
- [Java 9 java.lang.Module API](https://www.baeldung.com/java-9-module-api)
- [Java 9 Illegal Reflective Access Warning](https://www.baeldung.com/java-illegal-reflective-access)
- [Java Modularity and Unit Testing](https://www.baeldung.com/java-modularity-unit-testing)

17
core-java-modules/core-java-9-jigsaw/library-core/pom.xml
View File

@ -3,20 +3,14 @@
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>library-core</artifactId>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>
<artifactId>core-java-9-jigsaw</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>library-core</artifactId>
<properties>
<maven.compiler.source>19</maven.compiler.source>
<maven.compiler.target>19</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.junit.jupiter</groupId>
@ -52,4 +46,11 @@
</plugin>
</plugins>
</build>
<properties>
<maven.compiler.source>19</maven.compiler.source>
<maven.compiler.target>19</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
</project>

3
core-java-modules/core-java-9-jigsaw/pom.xml
View File

@ -4,8 +4,9 @@
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>core-java-9-jigsaw</artifactId>
<name>core-java-9-jigsaw</name>
<packaging>pom</packaging>
<name>core-java-9-jigsaw</name>
<modules>
<module>library-core</module>
</modules>

2
core-java-modules/core-java-9-streams/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-9-streams</artifactId>
<name>core-java-9-streams</name>
<packaging>jar</packaging>
<name>core-java-9-streams</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-annotations/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-annotations</artifactId>
<name>core-java-annotations</name>
<packaging>jar</packaging>
<name>core-java-annotations</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

3
core-java-modules/core-java-arrays-convert/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-arrays-convert</artifactId>
<name>core-java-arrays-convert</name>
<packaging>jar</packaging>
<name>core-java-arrays-convert</name>
<parent>
<artifactId>core-java-modules</artifactId>
@ -20,4 +20,5 @@
<version>${commons-lang3.version}</version>
</dependency>
</dependencies>
</project>

2
core-java-modules/core-java-arrays-guides/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-arrays-guides</artifactId>
<name>core-java-arrays-guides</name>
<packaging>jar</packaging>
<name>core-java-arrays-guides</name>
<parent>
<artifactId>core-java-modules</artifactId>

2
core-java-modules/core-java-arrays-multidimensional/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-arrays-multidimensional</artifactId>
<name>core-java-arrays-multidimensional</name>
<packaging>jar</packaging>
<name>core-java-arrays-multidimensional</name>
<parent>
<artifactId>core-java-modules</artifactId>

2
core-java-modules/core-java-arrays-operations-advanced-2/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-arrays-operations-advanced-2</artifactId>
<name>core-java-arrays-operations-advanced-2</name>
<packaging>jar</packaging>
<name>core-java-arrays-operations-advanced-2</name>
<parent>
<artifactId>core-java-modules</artifactId>

2
core-java-modules/core-java-arrays-operations-advanced/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-arrays-operations-advanced</artifactId>
<name>core-java-arrays-operations-advanced</name>
<packaging>jar</packaging>
<name>core-java-arrays-operations-advanced</name>
<parent>
<artifactId>core-java-modules</artifactId>

2
core-java-modules/core-java-arrays-operations-basic-2/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-arrays-operations-basic-2</artifactId>
<name>core-java-arrays-operations-basic-2</name>
<packaging>jar</packaging>
<name>core-java-arrays-operations-basic-2</name>
<parent>
<artifactId>core-java-modules</artifactId>

2
core-java-modules/core-java-arrays-operations-basic/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-arrays-operations-basic</artifactId>
<name>core-java-arrays-operations-basic</name>
<packaging>jar</packaging>
<name>core-java-arrays-operations-basic</name>
<parent>
<artifactId>core-java-modules</artifactId>

2
core-java-modules/core-java-arrays-sorting/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-arrays-sorting</artifactId>
<name>core-java-arrays-sorting</name>
<packaging>jar</packaging>
<name>core-java-arrays-sorting</name>
<parent>
<artifactId>core-java-modules</artifactId>

2
core-java-modules/core-java-booleans/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-booleans</artifactId>
<name>core-java-booleans</name>
<packaging>jar</packaging>
<name>core-java-booleans</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-char/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-char</artifactId>
<name>core-java-char</name>
<packaging>jar</packaging>
<name>core-java-char</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-collections-2/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-2</artifactId>
<name>core-java-collections-2</name>
<packaging>jar</packaging>
<name>core-java-collections-2</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-collections-3/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-3</artifactId>
<name>core-java-collections-3</name>
<packaging>jar</packaging>
<name>core-java-collections-3</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-collections-4/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-4</artifactId>
<name>core-java-collections-4</name>
<packaging>jar</packaging>
<name>core-java-collections-4</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-collections-5/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-5</artifactId>
<name>core-java-collections-5</name>
<packaging>jar</packaging>
<name>core-java-collections-5</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-collections-array-list-2/pom.xml
View File

@ -3,8 +3,8 @@
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>core-java-collections-array-list-2</artifactId>
<name>core-java-collections-array-list-2</name>
<packaging>jar</packaging>
<name>core-java-collections-array-list-2</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

40
core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/peakelements/MultiplePeakFinder.java Normal file
View File

@ -0,0 +1,40 @@
package com.baeldung.peakelements;
import java.util.ArrayList;
import java.util.List;
public class MultiplePeakFinder {
public static List<Integer> findPeaks(int[] arr) {
List<Integer> peaks = new ArrayList<>();
if (arr == null || arr.length == 0) {
return peaks;
}
findPeakElements(arr, 0, arr.length - 1, peaks, arr.length);
return peaks;
}
private static void findPeakElements(int[] arr, int low, int high, List<Integer> peaks, int length) {
if (low > high) {
return;
}
int mid = low + (high - low) / 2;
boolean isPeak = (mid == 0 || arr[mid] > arr[mid - 1]) && (mid == length - 1 || arr[mid] > arr[mid + 1]);
boolean isFirstInSequence = mid > 0 && arr[mid] == arr[mid - 1] && arr[mid] > arr[mid + 1];
if (isPeak || isFirstInSequence) {
if (!peaks.contains(arr[mid])) {
peaks.add(arr[mid]);
}
}
findPeakElements(arr, low, mid - 1, peaks, length);
findPeakElements(arr, mid + 1, high, peaks, length);
}
}

44
core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/peakelements/PeakElementFinder.java Normal file
View File

@ -0,0 +1,44 @@
package com.baeldung.peakelements;
import java.util.ArrayList;
import java.util.List;
public class PeakElementFinder {
public List<Integer> findPeakElements(int[] arr) {
int n = arr.length;
List<Integer> peaks = new ArrayList<>();
if (n == 0) {
return peaks;
}
for (int i = 0; i < n; i++) {
if (isPeak(arr, i, n)) {
peaks.add(arr[i]);
}
while (i < n - 1 && arr[i] == arr[i + 1]) {
i++;
}
}
return peaks;
}
private boolean isPeak(int[] arr, int index, int n) {
if (index == 0) {
return n > 1 ? arr[index] >= arr[index + 1] : true;
} else if (index == n - 1) {
return arr[index] >= arr[index - 1];
} else if (arr[index] == arr[index + 1] && arr[index] > arr[index - 1]) {
int i = index;
while (i < n - 1 && arr[i] == arr[i + 1]) {
i++;
}
return i == n - 1 || arr[i] > arr[i + 1];
} else {
return arr[index] >= arr[index - 1] && arr[index] >= arr[index + 1];
}
}
}

30
core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/peakelements/SinglePeakFinder.java Normal file
View File

@ -0,0 +1,30 @@
package com.baeldung.peakelements;
import java.util.OptionalInt;
public class SinglePeakFinder {
public static OptionalInt findSinglePeak(int[] arr) {
int n = arr.length;
if (n < 2) {
return n == 0 ? OptionalInt.empty() : OptionalInt.of(arr[0]);
}
if (arr[0] >= arr[1]) {
return OptionalInt.of(arr[0]);
}
for (int i = 1; i < n - 1; i++) {
if (arr[i] >= arr[i - 1] && arr[i] >= arr[i + 1]) {
return OptionalInt.of(arr[i]);
}
}
if (arr[n - 1] >= arr[n - 2]) {
return OptionalInt.of(arr[n - 1]);
}
return OptionalInt.empty();
}
}

23
core-java-modules/core-java-collections-array-list-2/src/test/java/com/baeldung/peakelements/MultiplePeakFinderUnitTest.java Normal file
View File

@ -0,0 +1,23 @@
package com.baeldung.peakelements;
import org.junit.jupiter.api.Test;
import java.util.List;
import static org.junit.jupiter.api.Assertions.*;
public class MultiplePeakFinderUnitTest {
@Test
void findPeaks_givenArrayOfIntegers_whenValidInput_thenReturnsCorrectPeaks() {
MultiplePeakFinder finder = new MultiplePeakFinder();
int[] array = {1, 13, 7, 0, 4, 1, 4, 45, 50};
List<Integer> peaks = finder.findPeaks(array);
assertEquals(3, peaks.size());
assertTrue(peaks.contains(4));
assertTrue(peaks.contains(13));
assertTrue(peaks.contains(50));
}
}

46
core-java-modules/core-java-collections-array-list-2/src/test/java/com/baeldung/peakelements/PeakElementFinderUnitTest.java Normal file
View File

@ -0,0 +1,46 @@
package com.baeldung.peakelements;
import org.junit.jupiter.api.Test;
import java.util.List;
import static org.junit.jupiter.api.Assertions.*;
public class PeakElementFinderUnitTest {
@Test
void findPeakElement_givenArrayOfIntegers_whenValidInput_thenReturnsCorrectPeak() {
PeakElementFinder finder = new PeakElementFinder();
int[] array = {1, 2, 3, 2, 1};
List<Integer> peaks = finder.findPeakElements(array);
assertEquals(1, peaks.size());
assertTrue(peaks.contains(3));
}
@Test
void findPeakElement_givenArrayOfIntegers_whenNoPeaks_thenReturnsEmptyList() {
PeakElementFinder finder = new PeakElementFinder();
int[] array = {};
List<Integer> peaks = finder.findPeakElements(array);
assertEquals(0, peaks.size());
}
@Test
void findPeakElement_givenArrayOfIntegers_whenPeaksAtExtremes_thenReturnsCorrectPeak() {
PeakElementFinder finder = new PeakElementFinder();
int[] array = {5, 2, 1, 3, 4};
List<Integer> peaks = finder.findPeakElements(array);
assertEquals(2, peaks.size());
assertTrue(peaks.contains(5));
assertTrue(peaks.contains(4));
}
@Test
void findPeakElement_givenArrayOfIntegers_whenPlateaus_thenReturnsCorrectPeak() {
PeakElementFinder finder = new PeakElementFinder();
int[] array = {1, 2, 2, 2, 3, 4, 5};
List<Integer> peaks = finder.findPeakElements(array);
assertEquals(1, peaks.size());
assertTrue(peaks.contains(5));
}
}

32
core-java-modules/core-java-collections-array-list-2/src/test/java/com/baeldung/peakelements/SinglePeakFinderUnitTest.java Normal file
View File

@ -0,0 +1,32 @@
package com.baeldung.peakelements;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.util.OptionalInt;
public class SinglePeakFinderUnitTest {
@Test
void findSinglePeak_givenArrayOfIntegers_whenValidInput_thenReturnsCorrectPeak() {
int[] arr = {0, 10, 2, 4, 5, 1};
OptionalInt peak = SinglePeakFinder.findSinglePeak(arr);
assertTrue(peak.isPresent());
assertEquals(10, peak.getAsInt());
}
@Test
void findSinglePeak_givenEmptyArray_thenReturnsEmptyOptional() {
int[] arr = {};
OptionalInt peak = SinglePeakFinder.findSinglePeak(arr);
assertTrue(peak.isEmpty());
}
@Test
void findSinglePeak_givenEqualElementArray_thenReturnsCorrectPeak() {
int[] arr = {-2, -2, -2, -2, -2};
OptionalInt peak = SinglePeakFinder.findSinglePeak(arr);
assertTrue(peak.isPresent());
assertEquals(-2, peak.getAsInt());
}
}

8
core-java-modules/core-java-collections-array-list/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-array-list</artifactId>
<name>core-java-collections-array-list</name>
<packaging>jar</packaging>
<name>core-java-collections-array-list</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>
@ -19,12 +19,6 @@
<artifactId>commons-collections4</artifactId>
<version>${commons-collections4.version}</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>

2
core-java-modules/core-java-collections-conversions-2/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-conversions-2</artifactId>
<name>core-java-collections-conversions-2</name>
<packaging>jar</packaging>
<name>core-java-collections-conversions-2</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-collections-conversions-3/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-conversions-3</artifactId>
<name>core-java-collections-conversions-3</name>
<packaging>jar</packaging>
<name>core-java-collections-conversions-3</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-collections-conversions/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-conversions</artifactId>
<name>core-java-collections-conversions</name>
<packaging>jar</packaging>
<name>core-java-collections-conversions</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-collections-list-2/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-list-2</artifactId>
<name>core-java-collections-list-2</name>
<packaging>jar</packaging>
<name>core-java-collections-list-2</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-collections-list-3/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-list-3</artifactId>
<name>core-java-collections-list-3</name>
<packaging>jar</packaging>
<name>core-java-collections-list-3</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-collections-list-4/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-list-4</artifactId>
<name>core-java-collections-list-4</name>
<packaging>jar</packaging>
<name>core-java-collections-list-4</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

3
core-java-modules/core-java-collections-list-5/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-list-5</artifactId>
<name>core-java-collections-list-5</name>
<packaging>jar</packaging>
<name>core-java-collections-list-5</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>
@ -60,6 +60,5 @@
<properties>
<jmh.version>1.21</jmh.version>
<gson.version>2.10.1</gson.version>
<org.json.version>20230618</org.json.version>
</properties>
</project>

7
core-java-modules/core-java-collections-list-6/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-list-6</artifactId>
<name>core-java-collections-list-6</name>
<packaging>jar</packaging>
<name>core-java-collections-list-6</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>
@ -14,11 +14,6 @@
</parent>
<dependencies>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>io.vavr</groupId>
<artifactId>vavr</artifactId>

2
core-java-modules/core-java-collections-list/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-list</artifactId>
<name>core-java-collections-list</name>
<packaging>jar</packaging>
<name>core-java-collections-list</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-collections-maps-2/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-maps-2</artifactId>
<name>core-java-collections-maps-2</name>
<packaging>jar</packaging>
<name>core-java-collections-maps-2</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

2
core-java-modules/core-java-collections-maps-3/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-maps-3</artifactId>
<name>core-java-collections-maps-3</name>
<packaging>jar</packaging>
<name>core-java-collections-maps-3</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

7
core-java-modules/core-java-collections-maps-4/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-maps-4</artifactId>
<name>core-java-collections-maps-4</name>
<packaging>jar</packaging>
<name>core-java-collections-maps-4</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>
@ -24,11 +24,6 @@
<artifactId>commons-collections4</artifactId>
<version>${commons-collections4.version}</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>

2
core-java-modules/core-java-collections-maps-5/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-maps-5</artifactId>
<name>core-java-collections-maps-5</name>
<packaging>jar</packaging>
<name>core-java-collections-maps-5</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

4
core-java-modules/core-java-collections-maps-6/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-maps-6</artifactId>
<name>core-java-collections-maps-6</name>
<packaging>jar</packaging>
<name>core-java-collections-maps-6</name>
<parent>
<artifactId>core-java-modules</artifactId>
@ -32,7 +32,7 @@
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20230227</version>
<version>${org.json.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>

1
core-java-modules/core-java-collections-maps-7/README.md
View File

@ -1,6 +1,5 @@
## Relevant Articles:
- [Difference Between putIfAbsent() and computeIfAbsent() in Java’s Map](https://www.baeldung.com/java-map-putifabsent-computeifabsent)
- [How to Write and Read a File with a Java HashMap](https://www.baeldung.com/how-to-write-and-read-a-file-with-a-java-hashmap/)
- [How to Write Hashmap to CSV File](https://www.baeldung.com/java-write-hashmap-csv)
- [How to Get First or Last Entry From a LinkedHashMap in Java](https://www.baeldung.com/java-linkedhashmap-first-last-key-value-pair)
- [How to Write and Read a File with a Java HashMap](https://www.baeldung.com/java-hashmap-write-read-file)

6
core-java-modules/core-java-collections-maps-7/pom.xml
View File

@ -29,11 +29,7 @@
<artifactId>commons-csv</artifactId>
<version>${csv.version}</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>

13
core-java-modules/core-java-collections-maps-7/src/test/java/com/baeldung/map/writehashmaptocsvfile/WriteHashmaptoCVSFileUnitTest.java
View File

@ -1,5 +1,6 @@
package com.baeldung.writehashmaptocsvfile;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.Test;
import java.io.File;
@ -63,4 +64,16 @@ public class WriteHashmaptoCVSFileUnitTest {
// Ensure the CSV file exists
assertTrue(new File("employee_data2.csv").exists());
}
@AfterAll
public static void cleanUp() {
final File employeeData = new File("employee_data.csv");
if (employeeData.exists()) {
employeeData.deleteOnExit();
}
final File employeeData2 = new File("employee_data2.csv");
if (employeeData2.exists()) {
employeeData2.deleteOnExit();
}
}
}

2
core-java-modules/core-java-collections-maps/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-maps</artifactId>
<name>core-java-collections-maps</name>
<packaging>jar</packaging>
<name>core-java-collections-maps</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>

7
core-java-modules/core-java-collections-set-2/pom.xml
View File

@ -4,8 +4,8 @@
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>core-java-collections-set-2</artifactId>
<name>core-java-collections-set-2</name>
<packaging>jar</packaging>
<name>core-java-collections-set-2</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>
@ -32,11 +32,6 @@
<version>7.7.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
</dependencies>
<build>

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