Merge branch 'eugenp:master' into master

apache-poi/README.md

@@ -12,3 +12,4 @@ This module contains articles about Apache POI
 - [Read Excel Cell Value Rather Than Formula With Apache POI](https://www.baeldung.com/apache-poi-read-cell-value-formula)
 - [Setting Formulas in Excel with Apache POI](https://www.baeldung.com/java-apache-poi-set-formulas)
 - [Insert a Row in Excel Using Apache POI](https://www.baeldung.com/apache-poi-insert-excel-row)
+- [Multiline Text in Excel Cell Using Apache POI](https://www.baeldung.com/apache-poi-write-multiline-text)

apache-poi/src/main/java/com/baeldung/poi/excel/cellstyle/CellStyleHandler.java

@@ -0,0 +1,30 @@
+package com.baeldung.poi.excel.cellstyle;
+
+import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.CellStyle;
+import org.apache.poi.ss.usermodel.FillPatternType;
+import org.apache.poi.ss.usermodel.IndexedColors;
+
+public class CellStyleHandler {
+
+    public void changeCellBackgroundColor(Cell cell) {
+        CellStyle cellStyle = cell.getCellStyle();
+        if(cellStyle == null) {
+            cellStyle = cell.getSheet().getWorkbook().createCellStyle();
+        }
+        cellStyle.setFillForegroundColor(IndexedColors.LIGHT_BLUE.getIndex());
+        cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
+        cell.setCellStyle(cellStyle);
+    }
+
+    public void changeCellBackgroundColorWithPattern(Cell cell) {
+        CellStyle cellStyle = cell.getCellStyle();
+        if(cellStyle == null) {
+            cellStyle = cell.getSheet().getWorkbook().createCellStyle();
+        }
+        cellStyle.setFillBackgroundColor(IndexedColors.BLACK.index);
+        cellStyle.setFillPattern(FillPatternType.BIG_SPOTS);
+        cellStyle.setFillForegroundColor(IndexedColors.LIGHT_BLUE.getIndex());
+        cell.setCellStyle(cellStyle);
+    }
+}

apache-poi/src/test/java/com/baeldung/poi/excel/cellstyle/CellStyleHandlerUnitTest.java

@@ -0,0 +1,56 @@
+package com.baeldung.poi.excel.cellstyle;
+
+import org.apache.poi.ss.usermodel.*;
+import org.apache.poi.xssf.usermodel.XSSFWorkbook;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.URISyntaxException;
+import java.nio.file.Paths;
+
+import static org.junit.Assert.assertEquals;
+
+public class CellStyleHandlerUnitTest {
+    private static final String FILE_NAME = "cellstyle/CellStyleHandlerTest.xlsx";
+    private static final int SHEET_INDEX = 0;
+    private static final int ROW_INDEX = 0;
+    private static final int CELL_INDEX = 0;
+
+    private String fileLocation;
+    private CellStyleHandler cellStyleHandler;
+
+    @Before
+    public void setup() throws URISyntaxException {
+        fileLocation = Paths.get(ClassLoader.getSystemResource(FILE_NAME).toURI()).toString();
+        cellStyleHandler = new CellStyleHandler();
+    }
+
+    @Test
+    public void givenWorkbookCell_whenChangeCellBackgroundColor() throws IOException {
+        Workbook workbook = new XSSFWorkbook(fileLocation);
+        Sheet sheet = workbook.getSheetAt(SHEET_INDEX);
+        Row row = sheet.getRow(ROW_INDEX);
+        Cell cell = row.getCell(CELL_INDEX);
+
+        cellStyleHandler.changeCellBackgroundColor(cell);
+
+        assertEquals(IndexedColors.LIGHT_BLUE.index, cell.getCellStyle().getFillForegroundColor());
+        workbook.close();
+    }
+
+    @Test
+    public void givenWorkbookCell_whenChangeCellBackgroundColorWithPattern() throws IOException {
+        Workbook workbook = new XSSFWorkbook(fileLocation);
+        Sheet sheet = workbook.getSheetAt(SHEET_INDEX);
+        Row row = sheet.getRow(ROW_INDEX);
+        Cell cell = row.getCell(CELL_INDEX + 1);
+
+        cellStyleHandler.changeCellBackgroundColorWithPattern(cell);
+
+        assertEquals(IndexedColors.LIGHT_BLUE.index, cell.getCellStyle().getFillForegroundColor());
+        workbook.close();
+    }
+}

core-java-modules/core-java-11-2/pom.xml

@@ -32,24 +32,6 @@
             <artifactId>mockserver-junit-jupiter</artifactId>
             <version>${mockserver.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-engine</artifactId>
-            <version>${junit-jupiter.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-params</artifactId>
-            <version>${junit-jupiter.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-api</artifactId>
-            <version>${junit-jupiter.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>

core-java-modules/core-java-14/pom.xml

@@ -22,18 +22,6 @@
             <version>${assertj.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-engine</artifactId>
-            <version>${junit-jupiter.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-api</artifactId>
-            <version>${junit-jupiter.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>

core-java-modules/core-java-15/pom.xml

@@ -27,18 +27,6 @@
             <version>${assertj.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-engine</artifactId>
-            <version>${junit-jupiter.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-api</artifactId>
-            <version>${junit-jupiter.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>

core-java-modules/core-java-16/pom.xml

@@ -28,18 +28,6 @@
             <artifactId>commons-lang3</artifactId>
             <version>3.12.0</version>
         </dependency>
-		<dependency>
-			<groupId>org.junit.jupiter</groupId>
-			<artifactId>junit-jupiter-engine</artifactId>
-			<version>${junit-jupiter.version}</version>
-			<scope>test</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.junit.jupiter</groupId>
-			<artifactId>junit-jupiter-api</artifactId>
-			<version>${junit-jupiter.version}</version>
-			<scope>test</scope>
-		</dependency>
     </dependencies>
 
     <build>

core-java-modules/core-java-17/pom.xml

@@ -23,18 +23,6 @@
             <version>${assertj.version}</version>
             <scope>test</scope>
         </dependency>
-		<dependency>
-			<groupId>org.junit.jupiter</groupId>
-			<artifactId>junit-jupiter-engine</artifactId>
-			<version>${junit-jupiter.version}</version>
-			<scope>test</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.junit.jupiter</groupId>
-			<artifactId>junit-jupiter-api</artifactId>
-			<version>${junit-jupiter.version}</version>
-			<scope>test</scope>
-		</dependency>
     </dependencies>
 
     <build>

core-java-modules/core-java-concurrency-2/pom.xml

@@ -15,11 +15,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.junit.vintage</groupId>
-            <artifactId>junit-vintage-engine</artifactId>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.googlecode.thread-weaver</groupId>
             <artifactId>threadweaver</artifactId>
@@ -31,6 +26,12 @@
             <artifactId>tempus-fugit</artifactId>
             <version>${tempus-fugit.version}</version>
             <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>junit</groupId>
+                    <artifactId>junit</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>com.googlecode.multithreadedtc</groupId>

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

@@ -2,3 +2,4 @@
 ### Relevant Articles:
 
 - [Java Naming and Directory Interface Overview](https://www.baeldung.com/jndi)
+- [LDAP Authentication Using Pure Java](https://www.baeldung.com/java-ldap-auth)

core-java-modules/core-java-jndi/pom.xml

@@ -15,23 +15,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter</artifactId>
-            <version>${junit-jupiter.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-api</artifactId>
-            <version>${junit-jupiter.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-engine</artifactId>
-            <version>${junit-jupiter.version}</version>
-        </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-core</artifactId>
@@ -58,6 +41,18 @@
             <artifactId>h2</artifactId>
             <version>${h2.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.directory.server</groupId>
+            <artifactId>apacheds-test-framework</artifactId>
+            <version>${apacheds.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>3.21.0</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
@@ -76,6 +71,7 @@
     <properties>
         <spring.version>5.0.9.RELEASE</spring.version>
         <h2.version>1.4.199</h2.version>
+        <apacheds.version>2.0.0.AM26</apacheds.version>
         <source.version>1.8</source.version>
         <target.version>1.8</target.version>
     </properties>

core-java-modules/core-java-jndi/src/test/java/com/baeldung/jndi/ldap/auth/JndiLdapAuthManualTest.java

@@ -0,0 +1,165 @@
+package com.baeldung.jndi.ldap.auth;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatCode;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+
+import java.util.Hashtable;
+
+import javax.naming.AuthenticationException;
+import javax.naming.Context;
+import javax.naming.NamingEnumeration;
+import javax.naming.directory.Attributes;
+import javax.naming.directory.DirContext;
+import javax.naming.directory.InitialDirContext;
+import javax.naming.directory.SearchControls;
+import javax.naming.directory.SearchResult;
+
+import org.apache.directory.server.annotations.CreateLdapServer;
+import org.apache.directory.server.annotations.CreateTransport;
+import org.apache.directory.server.core.annotations.ApplyLdifFiles;
+import org.apache.directory.server.core.annotations.CreateDS;
+import org.apache.directory.server.core.annotations.CreatePartition;
+import org.apache.directory.server.core.integ.AbstractLdapTestUnit;
+import org.apache.directory.server.core.integ.FrameworkRunner;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(FrameworkRunner.class)
+@CreateLdapServer(transports = { @CreateTransport(protocol = "LDAP", address = "localhost", port = 10390)})
+@CreateDS(
+  allowAnonAccess = false, partitions = {@CreatePartition(name = "TestPartition", suffix = "dc=baeldung,dc=com")})
+@ApplyLdifFiles({"users.ldif"})
+// class marked as manual test, as it has to run independently from the other unit tests in the module
+public class JndiLdapAuthManualTest extends AbstractLdapTestUnit {
+    
+    private static void authenticateUser(Hashtable<String, String> environment) throws Exception {
+        DirContext context = new InitialDirContext(environment);   
+        context.close();       
+    }
+
+    @Test
+    public void givenPreloadedLDAPUserJoe_whenAuthUserWithCorrectPW_thenAuthSucceeds() throws Exception {
+        
+        Hashtable<String, String> environment = new Hashtable<String, String>();
+        environment.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
+        environment.put(Context.PROVIDER_URL, "ldap://localhost:10390");
+        environment.put(Context.SECURITY_AUTHENTICATION, "simple");
+        
+        environment.put(Context.SECURITY_PRINCIPAL, "cn=Joe Simms,ou=Users,dc=baeldung,dc=com");
+        environment.put(Context.SECURITY_CREDENTIALS, "12345");
+        
+        assertThatCode(() -> authenticateUser(environment)).doesNotThrowAnyException();
+    }
+    
+    @Test
+    public void givenPreloadedLDAPUserJoe_whenAuthUserWithWrongPW_thenAuthFails() throws Exception {
+        
+        Hashtable<String, String> environment = new Hashtable<String, String>();
+        environment.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
+        environment.put(Context.PROVIDER_URL, "ldap://localhost:10390");
+        environment.put(Context.SECURITY_AUTHENTICATION, "simple");
+        
+        environment.put(Context.SECURITY_PRINCIPAL, "cn=Joe Simms,ou=Users,dc=baeldung,dc=com");
+        environment.put(Context.SECURITY_CREDENTIALS, "wronguserpw");
+        
+        assertThatExceptionOfType(AuthenticationException.class).isThrownBy(() -> authenticateUser(environment));
+    }
+    
+    @Test
+    public void givenPreloadedLDAPUserJoe_whenSearchAndAuthUserWithCorrectPW_thenAuthSucceeds() throws Exception {
+        
+        // first authenticate against LDAP as admin to search up DN of user : Joe Simms
+        
+        Hashtable<String, String> environment = new Hashtable<String, String>();
+        environment.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
+        environment.put(Context.PROVIDER_URL, "ldap://localhost:10390");
+        environment.put(Context.SECURITY_AUTHENTICATION, "simple");        
+        environment.put(Context.SECURITY_PRINCIPAL, "uid=admin,ou=system");
+        environment.put(Context.SECURITY_CREDENTIALS, "secret");
+        
+        DirContext adminContext = new InitialDirContext(environment);
+        
+        // define the search filter to find the person with CN : Joe Simms
+        String filter = "(&(objectClass=person)(cn=Joe Simms))";
+
+        // declare the attributes we want returned for the object being searched
+        String[] attrIDs = { "cn" };
+
+        // define the search controls
+        SearchControls searchControls = new SearchControls();
+        searchControls.setReturningAttributes(attrIDs);
+        searchControls.setSearchScope(SearchControls.SUBTREE_SCOPE);
+        
+        // search for User with filter cn=Joe Simms
+        NamingEnumeration<SearchResult> searchResults = adminContext.search("dc=baeldung,dc=com", filter, searchControls);
+        if (searchResults.hasMore()) {
+            
+            SearchResult result = (SearchResult) searchResults.next();
+            Attributes attrs = result.getAttributes();
+            
+            String distinguishedName = result.getNameInNamespace();
+            assertThat(distinguishedName).isEqualTo("cn=Joe Simms,ou=Users,dc=baeldung,dc=com");
+            
+            String commonName = attrs.get("cn").toString();
+            assertThat(commonName).isEqualTo("cn: Joe Simms");
+            
+            // authenticate new context with DN for user Joe Simms, using correct password
+        
+            environment.put(Context.SECURITY_PRINCIPAL, distinguishedName);
+            environment.put(Context.SECURITY_CREDENTIALS, "12345");
+            
+            assertThatCode(() -> authenticateUser(environment)).doesNotThrowAnyException();
+        }
+        
+        adminContext.close();               
+    }    
+    
+    @Test
+    public void givenPreloadedLDAPUserJoe_whenSearchAndAuthUserWithWrongPW_thenAuthFails() throws Exception {
+        
+        // first authenticate against LDAP as admin to search up DN of user : Joe Simms
+        
+        Hashtable<String, String> environment = new Hashtable<String, String>();
+        environment.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
+        environment.put(Context.PROVIDER_URL, "ldap://localhost:10390");
+        environment.put(Context.SECURITY_AUTHENTICATION, "simple");
+        environment.put(Context.SECURITY_PRINCIPAL, "uid=admin,ou=system");
+        environment.put(Context.SECURITY_CREDENTIALS, "secret");
+        DirContext adminContext = new InitialDirContext(environment);
+        
+        // define the search filter to find the person with CN : Joe Simms
+        String filter = "(&(objectClass=person)(cn=Joe Simms))";
+
+        // declare the attributes we want returned for the object being searched
+        String[] attrIDs = { "cn" };
+
+        // define the search controls
+        SearchControls searchControls = new SearchControls();
+        searchControls.setReturningAttributes(attrIDs);
+        searchControls.setSearchScope(SearchControls.SUBTREE_SCOPE);
+        
+        // search for User with filter cn=Joe Simms
+        NamingEnumeration<SearchResult> searchResults = adminContext.search("dc=baeldung,dc=com", filter, searchControls);
+        if (searchResults.hasMore()) {
+            
+            SearchResult result = (SearchResult) searchResults.next();
+            Attributes attrs = result.getAttributes();
+            
+            String distinguishedName = result.getNameInNamespace();
+            assertThat(distinguishedName).isEqualTo("cn=Joe Simms,ou=Users,dc=baeldung,dc=com");
+
+            String commonName = attrs.get("cn").toString();
+            assertThat(commonName).isEqualTo("cn: Joe Simms");
+            
+            // authenticate new context with DN for user Joe Simms, using wrong password
+        
+            environment.put(Context.SECURITY_PRINCIPAL, distinguishedName);
+            environment.put(Context.SECURITY_CREDENTIALS, "wronguserpassword");
+            
+            assertThatExceptionOfType(AuthenticationException.class).isThrownBy(() -> authenticateUser(environment));
+        }
+        
+        adminContext.close();               
+    }
+}

core-java-modules/core-java-jndi/src/test/resources/logback.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="WARN">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

core-java-modules/core-java-jndi/src/test/resources/users.ldif

@@ -0,0 +1,20 @@
+version: 1
+dn: dc=baeldung,dc=com
+objectClass: domain
+objectClass: top
+dc: baeldung
+
+dn: ou=Users,dc=baeldung,dc=com
+objectClass: organizationalUnit
+objectClass: top
+ou: Users
+
+dn: cn=Joe Simms,ou=Users,dc=baeldung,dc=com
+objectClass: inetOrgPerson
+objectClass: organizationalPerson
+objectClass: person
+objectClass: top
+cn: Joe Simms
+sn: Simms
+uid: user1
+userPassword: 12345

core-java-modules/core-java-jvm-2/pom.xml

@@ -15,11 +15,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.junit.vintage</groupId>
-            <artifactId>junit-vintage-engine</artifactId>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>

core-java-modules/core-java-jvm/pom.xml

@@ -16,11 +16,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.junit.vintage</groupId>
-            <artifactId>junit-vintage-engine</artifactId>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>

core-java-modules/core-java-lang-4/src/main/java/com/baeldung/constructorchaining/Customer.java

@@ -0,0 +1,34 @@
+package com.baeldung.constructorchaining;
+
+import java.util.Objects;
+
+public class Customer extends Person {
+    private final String loyaltyCardId;
+
+    public Customer(String firstName, String lastName, int age, String loyaltyCardId) {
+        this(firstName, null, lastName, age, loyaltyCardId);
+    }
+
+    public Customer(String firstName, String middleName, String lastName, int age, String loyaltyCardId) {
+        super(firstName, middleName, lastName, age);
+        this.loyaltyCardId = loyaltyCardId;
+    }
+
+    public String getLoyaltyCardId() {
+        return loyaltyCardId;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        if (!super.equals(o)) return false;
+        Customer customer = (Customer) o;
+        return Objects.equals(loyaltyCardId, customer.loyaltyCardId);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), loyaltyCardId);
+    }
+}

core-java-modules/core-java-lang-4/src/main/java/com/baeldung/constructorchaining/Person.java

@@ -0,0 +1,51 @@
+package com.baeldung.constructorchaining;
+
+import java.util.Objects;
+
+public class Person {
+    private final String firstName;
+    private final String middleName;
+    private final String lastName;
+    private final int age;
+
+    public Person(String firstName, String lastName, int age) {
+        this(firstName, null, lastName, age);
+    }
+
+
+    public Person(String firstName, String middleName, String lastName, int age) {
+        this.firstName = firstName;
+        this.middleName = middleName;
+        this.lastName = lastName;
+        this.age = age;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public String getMiddleName() {
+        return middleName;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Person person = (Person) o;
+        return age == person.age && Objects.equals(firstName, person.firstName) && Objects.equals(middleName, person.middleName) && Objects.equals(lastName, person.lastName);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(firstName, middleName, lastName, age);
+    }
+}

core-java-modules/core-java-lang-4/src/test/java/com/baeldung/constructorchaining/CustomerUnitTest.java

@@ -0,0 +1,31 @@
+package com.baeldung.constructorchaining;
+
+import org.junit.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+public class CustomerUnitTest {
+
+    @Test
+    public void givenNameLastNameAndAge_whenUsingDedicatedConstructor_shouldInitializeFieldsAndNullifyMiddleName() {
+        Customer mark = new Customer("Mark", "Johnson", 23, "abcd1234");
+
+        assertEquals(23, mark.getAge());
+        assertEquals("Mark", mark.getFirstName());
+        assertEquals("Johnson", mark.getLastName());
+        assertEquals("abcd1234", mark.getLoyaltyCardId());
+        assertNull(mark.getMiddleName());
+    }
+
+    @Test
+    public void givenAllFieldsRequired_whenUsingDedicatedConstructor_shouldInitializeAllFields() {
+        Customer mark = new Customer("Mark", "Andrew", "Johnson", 23, "abcd1234");
+
+        assertEquals(23, mark.getAge());
+        assertEquals("Mark", mark.getFirstName());
+        assertEquals("Andrew", mark.getMiddleName());
+        assertEquals("Johnson", mark.getLastName());
+        assertEquals("abcd1234", mark.getLoyaltyCardId());
+    }
+}

core-java-modules/core-java-lang-4/src/test/java/com/baeldung/constructorchaining/PersonUnitTest.java

@@ -0,0 +1,29 @@
+package com.baeldung.constructorchaining;
+
+import org.junit.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+public class PersonUnitTest {
+
+    @Test
+    public void givenNameLastNameAndAge_whenUsingDedicatedConstructor_shouldInitializeFieldsAndNullifyMiddleName() {
+        Person mark = new Person("Mark", "Johnson", 23);
+
+        assertEquals(23, mark.getAge());
+        assertEquals("Mark", mark.getFirstName());
+        assertEquals("Johnson", mark.getLastName());
+        assertNull(mark.getMiddleName());
+    }
+
+    @Test
+    public void givenAllFieldsRequired_whenUsingDedicatedConstructor_shouldInitializeAllFields() {
+        Person mark = new Person("Mark", "Andrew", "Johnson", 23);
+
+        assertEquals(23, mark.getAge());
+        assertEquals("Mark", mark.getFirstName());
+        assertEquals("Andrew", mark.getMiddleName());
+        assertEquals("Johnson", mark.getLastName());
+    }
+}

core-java-modules/core-java-networking-3/pom.xml

@@ -35,11 +35,6 @@
             <version>${assertj.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.junit.vintage</groupId>
-            <artifactId>junit-vintage-engine</artifactId>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.sun.mail</groupId>
             <artifactId>javax.mail</artifactId>

core-java-modules/core-java-os/pom.xml

@@ -16,12 +16,6 @@
 	</parent>
 
 	<dependencies>
-	    <dependency>
-		    <groupId>org.junit.jupiter</groupId>
-			<artifactId>junit-jupiter-engine</artifactId>
-            <version>${junit-jupiter.version}</version>
-			<scope>test</scope>
-		</dependency>
 		<dependency>
 			<groupId>org.apache.commons</groupId>
 			<artifactId>commons-collections4</artifactId>

core-java-modules/core-java-streams-2/pom.xml

@@ -30,11 +30,6 @@
             <artifactId>log4j</artifactId>
             <version>${log4j.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.junit.vintage</groupId>
-            <artifactId>junit-vintage-engine</artifactId>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>

core-java-modules/core-java-string-algorithms-3/pom.xml

@@ -26,11 +26,6 @@
             <artifactId>guava</artifactId>
             <version>${guava.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter</artifactId>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>commons-validator</groupId>
             <artifactId>commons-validator</artifactId>

core-java-modules/core-java-string-conversions-2/pom.xml

@@ -20,11 +20,6 @@
             <artifactId>guava</artifactId>
             <version>${guava.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.junit.vintage</groupId>
-            <artifactId>junit-vintage-engine</artifactId>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest</artifactId>

core-java-modules/core-java-string-operations-3/README.md

@@ -7,3 +7,5 @@
 - [Validate String as Filename in Java](https://www.baeldung.com/java-validate-filename)
 - [Count Spaces in a Java String](https://www.baeldung.com/java-string-count-spaces)
 - [Remove Accents and Diacritics From a String in Java](https://www.baeldung.com/java-remove-accents-from-text)
+- [Remove Beginning and Ending Double Quotes from a String](https://www.baeldung.com/java-remove-start-end-double-quote)
+- [Splitting a Java String by Multiple Delimiters](https://www.baeldung.com/java-string-split-multiple-delimiters)

core-java-modules/core-java-string-operations-3/pom.xml

@@ -52,6 +52,11 @@
             <artifactId>semver4j</artifactId>
             <version>${semver4j.version}</version>
         </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
     </dependencies>
 
     <build>
@@ -80,6 +85,7 @@
         <assertj.version>3.6.1</assertj.version>
         <spring-core.version>5.3.9</spring-core.version>
         <apache-commons-lang3.version>3.12.0</apache-commons-lang3.version>
+        <guava.version>31.0.1-jre</guava.version>
         <maven-artifact.version>3.6.3</maven-artifact.version>
         <gradle-core.version>6.1.1</gradle-core.version>
         <jackson-core.version>2.11.1</jackson-core.version>

core-java-modules/core-java-string-operations-3/src/test/java/com/baeldung/multipledelimiterssplit/MultipleDelimitersSplitUnitTest.java

@@ -0,0 +1,66 @@
+package com.baeldung.multipledelimiterssplit;
+
+import com.google.common.base.CharMatcher;
+import com.google.common.base.Splitter;
+import com.google.common.collect.Iterators;
+import org.apache.commons.lang3.StringUtils;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestInstance;
+
+import java.util.Arrays;
+import java.util.regex.Pattern;
+
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+public class MultipleDelimitersSplitUnitTest {
+
+    @Test
+    public void givenString_whenSplittingByMultipleDelimitersWithRegEx_thenStringSplit() {
+        String example = "Mary;Thomas:Jane-Kate";
+        String[] names = example.split(";|:|-");
+        String[] expectedNames = new String[]{"Mary", "Thomas", "Jane", "Kate"};
+        Assertions.assertEquals(4, names.length);
+        Assertions.assertArrayEquals(expectedNames, names);
+    }
+
+    @Test
+    public void givenString_whenSplittingByWithCharMatcherAndOnMethod_thenStringSplit() {
+        String example = "Mary;Thomas:Jane-Kate";
+        String[] expectedArray = new String[]{"Mary", "Thomas", "Jane", "Kate"};
+        Iterable<String> expected = Arrays.asList(expectedArray);
+        Iterable<String> names = Splitter.on(CharMatcher.anyOf(";:-")).split(example);
+        Assertions.assertEquals(4, Iterators.size(names.iterator()));
+        Assertions.assertIterableEquals(expected, names);
+    }
+
+    @Test
+    public void givenString_whenSplittingByWithRegexAndOnPatternMethod_thenStringSplit() {
+        String example = "Mary;Thomas:Jane-Kate";
+        String[] expectedArray = new String[]{"Mary", "Thomas", "Jane", "Kate"};
+        Iterable<String> expected = Arrays.asList(expectedArray);
+        Iterable<String> names = Splitter.on(Pattern.compile(";|:|-")).split(example);
+        Assertions.assertEquals(4, Iterators.size(names.iterator()));
+        Assertions.assertIterableEquals(expected, names);
+    }
+
+    @Test
+    public void givenString_whenSplittingByMultipleDelimitersWithGuava_thenStringSplit() {
+        String example = "Mary;Thomas:Jane-Kate";
+        String[] expectedArray = new String[]{"Mary", "Thomas", "Jane", "Kate"};
+        Iterable<String> expected = Arrays.asList(expectedArray);
+        Iterable<String> names = Splitter.onPattern(";|:|-").split(example);
+        Assertions.assertEquals(4, Iterators.size(names.iterator()));
+        Assertions.assertIterableEquals(expected, names);
+    }
+
+    @Test
+    public void givenString_whenSplittingByMultipleDelimitersWithApache_thenStringSplit() {
+        String example = "Mary;Thomas:Jane-Kate";
+        String[] expectedNames = new String[]{"Mary", "Thomas", "Jane", "Kate"};
+        String[] names = StringUtils.split(example, ";:-");
+        Assertions.assertEquals(4, names.length);
+        Assertions.assertArrayEquals(expectedNames, names);
+    }
+
+}
+

core-java-modules/core-java-time-measurements/pom.xml

@@ -75,8 +75,8 @@
         </resources>
         <plugins>
             <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>${maven-surefire-plugin.version}</version>
                 <configuration>
                     <argLine>
                         -javaagent:${settings.localRepository}/org/jmockit/jmockit/${jmockit.version}/jmockit-${jmockit.version}.jar
@@ -97,8 +97,6 @@
         <asspectj.version>1.8.9</asspectj.version>
         <powermock.version>2.0.7</powermock.version>
         <jmockit.version>1.44</jmockit.version>
-        <!-- plugins -->
-        <maven-surefire-plugin.version>2.22.1</maven-surefire-plugin.version>
     </properties>
 
 </project>