Merge branch 'eugenp:master' into master

2023-04-10 10:39:14 -05:00
parent aeb0bd3bd7 23c1abe3f2
commit 1628c013c6
769 changed files with 6256 additions and 3223 deletions
@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-10</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-11-2</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-11-3</name>
    <packaging>jar</packaging>

@@ -14,7 +13,7 @@
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../../pom.xml</relativePath>
    </parent>
-    
+
    <dependencies>
        <dependency>
            <groupId>com.google.code.gson</groupId>
@@ -4,10 +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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-11</name>
    <packaging>jar</packaging>
-    <url>http://maven.apache.org</url>

    <parent>
        <groupId>com.baeldung</groupId>
@@ -4,10 +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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-12</name>
    <packaging>jar</packaging>
-    <url>http://maven.apache.org</url>

    <parent>
        <groupId>com.baeldung</groupId>
@@ -3,12 +3,9 @@
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung</groupId>
    <artifactId>core-java-13</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-13</name>
    <packaging>jar</packaging>
-    <url>http://maven.apache.org</url>

    <parent>
        <groupId>com.baeldung</groupId>
@@ -6,7 +6,6 @@
    <artifactId>core-java-14</artifactId>
    <name>core-java-14</name>
    <packaging>jar</packaging>
-    <url>http://maven.apache.org</url>

    <parent>
        <groupId>com.baeldung</groupId>
@@ -6,7 +6,6 @@
    <artifactId>core-java-15</artifactId>
    <name>core-java-15</name>
    <packaging>jar</packaging>
-    <url>http://maven.apache.org</url>

    <parent>
        <groupId>com.baeldung</groupId>
@@ -4,10 +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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-16</name>
    <packaging>jar</packaging>
-    <url>http://maven.apache.org</url>

    <parent>
        <groupId>com.baeldung</groupId>
@@ -4,10 +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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-17</name>
    <packaging>jar</packaging>
-    <url>http://maven.apache.org</url>

    <parent>
        <groupId>com.baeldung</groupId>
@@ -1,21 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
+    <artifactId>core-java-19</artifactId>
+    <name>core-java-19</name>
+
    <parent>
        <groupId>com.baeldung.core-java-modules</groupId>
        <artifactId>core-java-modules</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

-    <artifactId>core-java-19</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>
    <build>
        <plugins>
            <plugin>
@@ -30,4 +26,10 @@
        </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>
@@ -0,0 +1,20 @@
+package com.baeldung.highcpu;
+
+import java.util.LinkedList;
+import java.util.List;
+import java.util.function.IntUnaryOperator;
+import java.util.stream.IntStream;
+
+public class Application {
+
+    static List<Integer> generateList() {
+        return IntStream.range(0, 10000000).parallel().map(IntUnaryOperator.identity()).collect(LinkedList::new, List::add, List::addAll);
+    }
+
+    public static void main(String[] args) {
+        List<Integer> list = generateList();
+        long start = System.nanoTime();
+        int value = list.get(9500000);
+        System.out.printf("Found value %d in %d nanos\n", value, (System.nanoTime() - start));
+    }
+}
@@ -4,7 +4,6 @@
    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-8-2</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-8-2</name>
    <packaging>jar</packaging>

@@ -0,0 +1,40 @@
+package com.baeldung.helpervsutilityclasses;
+
+class MyHelperClass {
+    public double discount;
+    public MyHelperClass(double discount) {
+        if (discount > 0 && discount < 1) {
+            this.discount = discount;
+        }
+    }
+    public double discountedPrice(double price) {
+        return price - (price * discount);
+    }
+
+    public static int getMaxNumber(int[] numbers) {
+        if (numbers.length == 0) {
+            throw new IllegalArgumentException("Ensure array is not empty");
+        }
+        int max = numbers[0];
+        for (int i = 1; i < numbers.length; i++) {
+            if (numbers[i] > max) {
+                max = numbers[i];
+            }
+        }
+        return max;
+    }
+
+    public static int getMinNumber(int[] numbers) {
+        if (numbers.length == 0) {
+            throw new IllegalArgumentException("Ensure array is not empty");
+        }
+        int min = numbers[0];
+        for (int i = 1; i < numbers.length; i++) {
+            if (numbers[i] < min) {
+                min = numbers[i];
+            }
+        }
+        return min;
+    }
+
+}
@@ -0,0 +1,19 @@
+package com.baeldung.helpervsutilityclasses;
+
+public final class MyUtilityClass {
+
+    private MyUtilityClass(){}
+
+    public static String returnUpperCase(String stringInput) {
+        return stringInput.toUpperCase();
+    }
+
+    public static String returnLowerCase(String stringInput) {
+        return stringInput.toLowerCase();
+    }
+
+    public static String[] splitStringInput(String stringInput, String delimiter) {
+        return stringInput.split(delimiter);
+    }
+
+}
@@ -0,0 +1,20 @@
+package com.baeldung.helpervsutilityclasses;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+
+class MyHelperClassUnitTest {
+
+    @Test
+    void whenCreatingHelperObject_thenHelperObjectShouldBeCreated() {
+        MyHelperClass myHelperClassObject = new MyHelperClass(0.10);
+        int[] numberArray = {15, 23, 66, 3, 51, 79};
+
+        assertNotNull(myHelperClassObject);
+
+        assertEquals(90, myHelperClassObject.discountedPrice(100.00));
+        assertEquals( 79, MyHelperClass.getMaxNumber(numberArray));
+        assertEquals(3, MyHelperClass.getMinNumber(numberArray));
+    }
+}
@@ -0,0 +1,15 @@
+package com.baeldung.helpervsutilityclasses;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+
+class MyUtilityClassUnitTest {
+
+    @Test
+    void whenUsingUtilityMethods_thenAccessMethodsViaClassName(){
+        assertEquals( "INIUBONG", MyUtilityClass.returnUpperCase("iniubong"));
+        assertEquals("accra", MyUtilityClass.returnLowerCase("AcCrA"));
+    }
+
+}
@@ -4,7 +4,6 @@
    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>
-    <version>${project.parent.version}</version>
    <name>core-java-8-datetime-2</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>${project.parent.version}</version>
    <name>core-java-8-datetime</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-8</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-improvements</artifactId>
-    <version>0.2-SNAPSHOT</version>
    <name>core-java-9-improvements</name>

    <parent>
@@ -4,7 +4,6 @@
    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>
-    <version>0.2-SNAPSHOT</version>
    <name>core-java-9-jigsaw</name>

    <parent>
@@ -4,7 +4,6 @@
    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-new-features</artifactId>
-    <version>0.2-SNAPSHOT</version>
    <name>core-java-9-new-features</name>

    <parent>
@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-9-streams</name>
    <packaging>jar</packaging>

@@ -5,7 +5,6 @@ This module contains articles about Java 9 core features
 ### Relevant Articles:

 - [Method Handles in Java](https://www.baeldung.com/java-method-handles)
- [Introduction to Chronicle Queue](https://www.baeldung.com/java-chronicle-queue)
 - [Iterate Through a Range of Dates in Java](https://www.baeldung.com/java-iterate-date-range)
 - [Initialize a HashMap in Java](https://www.baeldung.com/java-initialize-hashmap)
 - [Immutable ArrayList in Java](https://www.baeldung.com/java-immutable-list)
@@ -4,7 +4,6 @@
    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</artifactId>
-    <version>0.2-SNAPSHOT</version>
    <name>core-java-9</name>

    <parent>
@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-annotations</name>
    <packaging>jar</packaging>

@@ -24,4 +23,12 @@
        </resources>
    </build>

+    <dependencies>
+        <dependency>
+            <groupId>javax.annotation</groupId>
+            <artifactId>javax.annotation-api</artifactId>
+            <version>1.3.2</version>
+        </dependency>
+    </dependencies>
+
 </project>
@@ -0,0 +1,6 @@
+## Core Java Booleans
+
+This module contains articles about Java Booleans.
+
+### Relevant Articles: 
+- [Convert Boolean to String in Java](https://www.baeldung.com/java-convert-boolean-to-string)
@@ -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>core-java-booleans</artifactId>
+    <name>core-java-booleans</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+</project>
@@ -0,0 +1,48 @@
+package com.baeldung.booleans;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class BooleanToStringUnitTest {
+    String optionToString(String optionName, boolean optionValue) {
+        return String.format("The option '%s' is %s.", optionName, optionValue ? "Enabled" : "Disabled");
+    }
+
+    @Test
+    void givenPrimitiveBoolean_whenConvertingUsingTernaryOperator_thenSuccess() {
+        boolean primitiveBoolean = true;
+        assertEquals("true", primitiveBoolean ? "true" : "false");
+
+        primitiveBoolean = false;
+        assertEquals("false", primitiveBoolean ? "true" : "false");
+
+        assertEquals("The option 'IgnoreWarnings' is Enabled.", optionToString("IgnoreWarnings", true));
+    }
+
+
+    @Test
+    void givenBooleanObject_whenConvertingUsingBooleanToString_thenSuccess() {
+        Boolean myBoolean = Boolean.TRUE;
+        assertEquals("true", myBoolean.toString());
+
+        myBoolean = Boolean.FALSE;
+        assertEquals("false", myBoolean.toString());
+
+        Boolean nullBoolean = null;
+        assertThrows(NullPointerException.class, () -> nullBoolean.toString());
+    }
+
+    @Test
+    void givenBooleanObject_whenConvertingUsingStringValueOf_thenSuccess() {
+        Boolean myBoolean = Boolean.TRUE;
+        assertEquals("true", String.valueOf(myBoolean));
+
+        myBoolean = Boolean.FALSE;
+        assertEquals("false", String.valueOf(myBoolean));
+
+        Boolean nullBoolean = null;
+        assertEquals("null", String.valueOf(nullBoolean));
+    }
+}
@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-char</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-3</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-4</name>
    <packaging>jar</packaging>

@@ -1,10 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <artifactId>core-java-collections-5</artifactId>
-    <version>0.0.1-SNAPSHOT</version>
    <name>core-java-collections-5</name>
    <packaging>jar</packaging>

@@ -55,4 +54,5 @@
        <roaringbitmap.version>0.9.38</roaringbitmap.version>
        <jmh.version>1.36</jmh.version>
    </properties>
+    
 </project>
@@ -4,34 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <configuration>
-                    <source>${maven-compiler-plugin.source}</source>
-                    <target>${maven-compiler-plugin.target}</target>
-                </configuration>
-            </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>${surefire.plugin.version}</version>
-                <configuration>
-                    <argLine>
-                        --add-opens java.base/java.util=ALL-UNNAMED
-                    </argLine>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
-    <properties>
-        <maven-compiler-plugin.source>16</maven-compiler-plugin.source>
-        <maven-compiler-plugin.target>16</maven-compiler-plugin.target>
-        <surefire.plugin.version>3.0.0-M3</surefire.plugin.version>
-    </properties>
    <name>core-java-collections-array-list</name>
    <packaging>jar</packaging>

@@ -55,4 +27,33 @@
        </dependency>
    </dependencies>

+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${maven-compiler-plugin.source}</source>
+                    <target>${maven-compiler-plugin.target}</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>${surefire.plugin.version}</version>
+                <configuration>
+                    <argLine>
+                        --add-opens java.base/java.util=ALL-UNNAMED
+                    </argLine>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <maven-compiler-plugin.source>16</maven-compiler-plugin.source>
+        <maven-compiler-plugin.target>16</maven-compiler-plugin.target>
+        <surefire.plugin.version>3.0.0-M3</surefire.plugin.version>
+    </properties>
+
 </project>
@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-conversions-2</name>
    <packaging>jar</packaging>

@@ -9,6 +9,7 @@ import java.util.Collection;
 */
 public class UserList {

+    public UserList() {}
    private Collection<User> users;

    public Collection<User> getUsers() {
@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-conversions</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-list-2</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-list-3</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-list-4</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-list-5</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-list</name>
    <packaging>jar</packaging>

@@ -6,6 +6,7 @@ import com.baeldung.java_8_features.Person;
 import org.junit.Test;

 import java.util.Arrays;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
 import java.util.NoSuchElementException;
@@ -71,4 +72,17 @@ public class Java8MaxMinUnitTest {

        assertEquals(bugatti, maxBySpeed);
    }
+
+    @Test
+    public void givenIntegerList_whenGetMinAndIndex_thenSuccess() {
+        final List<Integer> listOfIntegers = Arrays.asList(11, 13, 9, 20, 7, 3, 30);
+        final Integer expectedMinValue = 3;
+        final Integer expectedMinIndex = 5;
+
+        Integer minValue = Collections.min(listOfIntegers);
+        Integer minIndex = listOfIntegers.indexOf(minValue);
+
+        assertEquals(minValue, expectedMinValue);
+        assertEquals(minIndex, expectedMinIndex);
+    }
 }
@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-maps-2</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-maps-3</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-maps-4</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-maps-5</name>
    <packaging>jar</packaging>

@@ -1,17 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
    <artifactId>core-java-collections-maps-6</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-maps-6</name>
    <packaging>jar</packaging>
+
    <parent>
        <artifactId>core-java-modules</artifactId>
        <groupId>com.baeldung.core-java-modules</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
-    <modelVersion>4.0.0</modelVersion>

    <properties>
        <spring.version>5.2.5.RELEASE</spring.version>
@@ -4,7 +4,6 @@
    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>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-maps</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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>
-    <version>0.0.1-SNAPSHOT</version>
    <name>core-java-collections-set-2</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-set</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-concurrency-2</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-concurrency-2</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-concurrency-advanced-2</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-concurrency-advanced-2</name>
    <packaging>jar</packaging>

@@ -2,7 +2,8 @@ package com.baeldung.concurrent.prioritytaskexecution;

 import org.junit.Test;

-public class PriorityJobSchedulerUnitTest {
+//Converted to ManualTest due to thread sleep
+public class PriorityJobSchedulerManualTest {
    private static final int POOL_SIZE = 1;
    private static final int QUEUE_SIZE = 10;

@@ -4,7 +4,6 @@
    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-concurrency-advanced-3</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-concurrency-advanced-3</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-concurrency-advanced-4</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-concurrency-advanced-4</name>
    <packaging>jar</packaging>

@@ -14,9 +13,6 @@
        <version>0.0.1-SNAPSHOT</version>
    </parent>

-    <dependencies>
-    </dependencies>
-
    <build>
        <finalName>core-java-concurrency-advanced-4</finalName>
        <plugins>
@@ -4,7 +4,6 @@
    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-concurrency-advanced</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-concurrency-advanced</name>
    <packaging>jar</packaging>

@@ -1,9 +1,14 @@
 package com.baeldung.concurrent.countdownlatch;

+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.util.List;
 import java.util.concurrent.CountDownLatch;

 public class Worker implements Runnable {
+
+    private static Logger log = LoggerFactory.getLogger(Worker.class);
    private final List<String> outputScraper;
    private final CountDownLatch countDownLatch;

@@ -15,7 +20,7 @@ public class Worker implements Runnable {
    @Override
    public void run() {
        // Do some work
-        System.out.println("Doing some logic");
+        log.debug("Doing some logic");
        outputScraper.add("Counted down");
        countDownLatch.countDown();
    }
@@ -1,8 +1,13 @@
 package com.baeldung.concurrent.phaser;

+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.util.concurrent.Phaser;

 class LongRunningAction implements Runnable {
+
+    private static Logger log = LoggerFactory.getLogger(LongRunningAction.class);
    private String threadName;
    private Phaser ph;

@@ -14,18 +19,18 @@ class LongRunningAction implements Runnable {

    @Override
    public void run() {
-        System.out.println("This is phase " + ph.getPhase());
-        System.out.println("Thread " + threadName + " before long running action");
+        log.info("This is phase {}", ph.getPhase());
+        log.info("Thread {} before long running action", threadName);
        
        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
-        
-        System.out.println("Thread " + threadName + " action completed and waiting for others");
+
+        log.debug("Thread {} action completed and waiting for others", threadName);
        ph.arriveAndAwaitAdvance();
-        System.out.println("Thread " + threadName + " proceeding in phase " + ph.getPhase());
+        log.debug("Thread {} proceeding in phase {}", threadName, ph.getPhase());
        
        ph.arriveAndDeregister();
    }
@@ -4,6 +4,9 @@ import org.junit.FixMethodOrder;
 import org.junit.Test;
 import org.junit.runners.MethodSorters;

+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Phaser;
@@ -13,6 +16,8 @@ import static junit.framework.TestCase.assertEquals;
@FixMethodOrder(MethodSorters.NAME_ASCENDING)
 public class PhaserUnitTest {

+    private static Logger log = LoggerFactory.getLogger(PhaserUnitTest.class);
+
    @Test
    public void givenPhaser_whenCoordinateWorksBetweenThreads_thenShouldCoordinateBetweenMultiplePhases() {
        //given
@@ -26,19 +31,19 @@ public class PhaserUnitTest {
        executorService.submit(new LongRunningAction("thread-3", ph));

        //then
-        System.out.println("Thread " + Thread.currentThread().getName() + " waiting for others");
+        log.debug("Thread {} waiting for others", Thread.currentThread().getName());
        ph.arriveAndAwaitAdvance();
-        System.out.println("Thread " + Thread.currentThread().getName() + " proceeding in phase " + ph.getPhase());
+        log.debug("Thread {} proceeding in phase {}", Thread.currentThread().getName(), ph.getPhase());
        
        assertEquals(1, ph.getPhase());

        //and
        executorService.submit(new LongRunningAction("thread-4", ph));
        executorService.submit(new LongRunningAction("thread-5", ph));
-        
-        System.out.println("Thread " + Thread.currentThread().getName() + " waiting for others");
+
+        log.debug("Thread {} waiting for others", Thread.currentThread().getName());
        ph.arriveAndAwaitAdvance();
-        System.out.println("Thread " + Thread.currentThread().getName() + " proceeding in phase " + ph.getPhase());
+        log.debug("Thread {} proceeding in phase {}", Thread.currentThread().getName(), ph.getPhase());
        
        assertEquals(2, ph.getPhase());

@@ -0,0 +1,19 @@
+<?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>
+
+    <logger name="org.springframework" level="WARN" />
+    <logger name="org.springframework.transaction" level="WARN" />
+
+    <!-- in order to debug some marshalling issues, this needs to be TRACE -->
+    <logger name="org.springframework.web.servlet.mvc" level="WARN" />
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
@@ -4,7 +4,6 @@
    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-concurrency-basic-2</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-concurrency-basic-2</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-concurrency-basic-3</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-concurrency-basic-3</name>
    <packaging>jar</packaging>

@@ -14,6 +13,15 @@
        <version>0.0.1-SNAPSHOT</version>
    </parent>

+    <dependencies>
+        <dependency>
+            <groupId>org.awaitility</groupId>
+            <artifactId>awaitility</artifactId>
+            <version>${awaitility.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
    <build>
        <finalName>core-java-concurrency-basic-3</finalName>
        <resources>
@@ -28,12 +36,4 @@
        <awaitility.version>4.2.0</awaitility.version>
    </properties>

-    <dependencies>
-        <dependency>
-            <groupId>org.awaitility</groupId>
-            <artifactId>awaitility</artifactId>
-            <version>${awaitility.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
 </project>
@@ -4,7 +4,6 @@
    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-concurrency-basic</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-concurrency-basic</name>
    <packaging>jar</packaging>

@@ -3,7 +3,6 @@
    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-concurrency-collections-2</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-concurrency-collections-2</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-concurrency-collections</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-concurrency-collections</name>
    <packaging>jar</packaging>

@@ -3,7 +3,6 @@
    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-concurrency-simple</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-concurrency-simple</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-console</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-console</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-date-operations-1</artifactId>
-    <version>${project.parent.version}</version>
    <name>core-java-date-operations-1</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-date-operations-2</artifactId>
-    <version>${project.parent.version}</version>
    <name>core-java-date-operations-2</name>
    <packaging>jar</packaging>

@@ -5,4 +5,5 @@ This module contains articles about date operations in Java.

 - [Create Date From Unix Timestamp in Java](https://www.baeldung.com/java-date-unix-timestamp)
 - [Convert java.util.Date to java.sql.Date](https://www.baeldung.com/java-convert-util-date-to-sql)
+- [How to Determine Date of the First Day of the Week Using LocalDate in Java](https://www.baeldung.com/java-first-day-of-the-week)
 - [[<-- Prev]](/core-java-modules/core-java-date-operations-2)
@@ -4,7 +4,6 @@
    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-date-operations-3</artifactId>
-    <version>${project.parent.version}</version>
    <name>core-java-date-operations-3</name>
    <packaging>jar</packaging>

@@ -14,10 +13,4 @@
        <version>0.0.1-SNAPSHOT</version>
    </parent>

-    <dependencies>
-    </dependencies>
-
-    <properties>
-    </properties>
-
 </project>
@@ -4,7 +4,6 @@
    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-datetime-string-2</artifactId>
-    <version>${project.parent.version}</version>
    <name>core-java-datetime-string-2</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-datetime-string</artifactId>
-    <version>${project.parent.version}</version>
    <name>core-java-datetime-string</name>
    <packaging>jar</packaging>

@@ -20,7 +19,6 @@
            <artifactId>commons-lang3</artifactId>
            <version>${commons-lang3.version}</version>
        </dependency>
-        <!-- https://mvnrepository.com/artifact/commons-validator/commons-validator -->
        <dependency>
            <groupId>commons-validator</groupId>
            <artifactId>commons-validator</artifactId>
@@ -5,8 +5,6 @@
    <artifactId>core-java-exceptions-2</artifactId>
    <name>core-java-exceptions-2</name>
    <packaging>jar</packaging>
-    <description> </description>
-    <url>http://maven.apache.org</url>

    <parent>
        <groupId>com.baeldung.core-java-modules</groupId>
@@ -3,9 +3,7 @@
    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.exceptions</groupId>
    <artifactId>core-java-exceptions-3</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-exceptions-3</name>
    <packaging>jar</packaging>

@@ -3,9 +3,7 @@
    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.exceptions</groupId>
    <artifactId>core-java-exceptions-4</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-exceptions-4</name>
    <packaging>jar</packaging>

@@ -3,9 +3,7 @@
    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.exceptions</groupId>
    <artifactId>core-java-exceptions</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-exceptions</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-function</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-function</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-functional</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-functional</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-hex</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-hex</name>
    <packaging>jar</packaging>

@@ -14,12 +13,4 @@
        <version>0.0.1-SNAPSHOT</version>
    </parent>

-    <dependencies>
-        
-    </dependencies>
-
-    <properties>
-        
-    </properties>
-
 </project>
@@ -4,7 +4,6 @@
    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-httpclient</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-httpclient</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-io-2</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-io-2</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-io-3</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-io-3</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-io-4</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-io-4</name>
    <packaging>jar</packaging>

@@ -0,0 +1 @@
+Hello, world!
@@ -4,7 +4,6 @@
    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-io-apis-2</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-io-apis-2</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-io-apis</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-io-apis</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-io-conversions-2</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-io-conversions-2</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-io-conversions</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-io-conversions</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-io</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-io</name>
    <packaging>jar</packaging>

@@ -4,7 +4,6 @@
    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-jar</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-jar</name>
    <packaging>jar</packaging>

@@ -3,9 +3,7 @@
    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>
    <name>core-java-jndi</name>

    <parent>
@@ -4,7 +4,6 @@
    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-jvm-2</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-jvm-2</name>
    <packaging>jar</packaging>

@@ -27,9 +26,28 @@
        </dependency>
    </dependencies>

+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                    <compilerArgs>
+                        <arg>--add-exports=java.base/jdk.internal.vm.annotation=ALL-UNNAMED</arg>
+                    </compilerArgs>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
    <properties>
        <jol-core.version>0.10</jol-core.version>
        <reflections.version>0.10.2</reflections.version>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
    </properties>

 </project>
@@ -3,7 +3,8 @@ package com.baeldung.memlayout;
 import org.junit.Test;
 import org.openjdk.jol.info.ClassLayout;
 import org.openjdk.jol.vm.VM;
-import sun.misc.Contended;
+
+import jdk.internal.vm.annotation.Contended;

 public class MemoryLayoutUnitTest {

@@ -4,7 +4,6 @@
    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-jvm-3</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-jvm-3</name>
    <packaging>jar</packaging>

@@ -14,7 +13,4 @@
        <version>0.0.1-SNAPSHOT</version>
    </parent>

-    <dependencies>
-    </dependencies>
-
 </project>
@@ -4,7 +4,6 @@
    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-jvm</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-jvm</name>
    <packaging>jar</packaging>

@@ -30,13 +29,6 @@
            <artifactId>esapi</artifactId>
            <version>${esapi.version}</version>
        </dependency>
-        <dependency>
-            <groupId>com.sun</groupId>
-            <artifactId>tools</artifactId>
-            <version>${sun.tools.version}</version>
-            <scope>system</scope>
-            <systemPath>${java.home}/../lib/tools.jar</systemPath>
-        </dependency>
        <dependency>
            <groupId>org.ow2.asm</groupId>
            <artifactId>asm</artifactId>
@@ -176,9 +168,8 @@

    <properties>
        <javaassist.version>3.27.0-GA</javaassist.version>
-        <sun.tools.version>1.8.0</sun.tools.version>
        <jol-core.version>0.10</jol-core.version>
-        <asm.version>8.0.1</asm.version>
+        <asm.version>9.4</asm.version>
        <bcel.version>6.5.0</bcel.version>
    </properties>

@@ -1,13 +1,7 @@
 package com.baeldung.classloader;

-import com.sun.javafx.util.Logging;
+import java.sql.DriverManager;

-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.net.MalformedURLException;
-import java.net.URL;
-import java.net.URLConnection;
 import java.util.ArrayList;

 public class PrintClassLoader {
@@ -15,7 +9,7 @@ public class PrintClassLoader {
    public void printClassLoaders() throws ClassNotFoundException {

        System.out.println("Classloader of this class:" + PrintClassLoader.class.getClassLoader());
-        System.out.println("Classloader of Logging:" + Logging.class.getClassLoader());
+        System.out.println("Classloader of DriverManager:" + DriverManager.class.getClassLoader());
        System.out.println("Classloader of ArrayList:" + ArrayList.class.getClassLoader());

    }
--- a/Show More
+++ b/Show More