Merge branch 'master' of https://github.com/eugenp/tutorials

2020-06-09 21:35:29 -03:00
parent 95133a56ff 26c11b3e85
commit 21a471e283
453 changed files with 7679 additions and 1492 deletions
@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [AWS AppSync With Spring Boot](https://www.baeldung.com/aws-appsync-spring)
@@ -4,19 +4,19 @@ import java.util.Objects;

 public record Person (String name, String address) {
 	
-	public static String UNKWOWN_ADDRESS = "Unknown";
-	public static String UNNAMED = "Unnamed";
+	  public static String UNKNOWN_ADDRESS = "Unknown";
+	  public static String UNNAMED = "Unnamed";

-	public Person {
-		Objects.requireNonNull(name);
-		Objects.requireNonNull(address);
-	}
+	  public Person {
+		    Objects.requireNonNull(name);
+		    Objects.requireNonNull(address);
+	  }
 	
-	public Person(String name) {
-		this(name, UNKWOWN_ADDRESS);
-	}
+	  public Person(String name) {
+		    this(name, UNKNOWN_ADDRESS);
+	  }
 	
-	public static Person unnamed(String address) {
-		return new Person(UNNAMED, address);
-	}
-}
+	  public static Person unnamed(String address) {
+		    return new Person(UNNAMED, address);
+	  }
+}
@@ -134,7 +134,7 @@ public class PersonTest {
        Person person = new Person(name);

        assertEquals(name, person.name());
-        assertEquals(Person.UNKWOWN_ADDRESS, person.address());
+        assertEquals(Person.UNKNOWN_ADDRESS, person.address());
    }

    @Test
@@ -147,4 +147,4 @@ public class PersonTest {
        assertEquals(Person.UNNAMED, person.name());
        assertEquals(address, person.address());
    }
-}
+}
@@ -8,12 +8,11 @@
    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-8-2</name>
    <packaging>jar</packaging>
-
    <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-java</artifactId>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-java</relativePath>
+        <relativePath>../</relativePath>
    </parent>

    <dependencies>
@@ -4,16 +4,15 @@
    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-8-datetime</artifactId>
+    <artifactId>core-java-8-datetime-2</artifactId>
    <version>${project.parent.version}</version>
    <name>core-java-8-datetime</name>
    <packaging>jar</packaging>
-
    <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-java</artifactId>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-java</relativePath>
+        <relativePath>../</relativePath>
    </parent>

    <dependencies>
@@ -42,7 +41,6 @@
    </dependencies>

    <build>
-        <finalName>core-java-datetime-java8</finalName>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
@@ -8,12 +8,11 @@
    <version>${project.parent.version}</version>
    <name>core-java-8-datetime</name>
    <packaging>jar</packaging>
-
    <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-java</artifactId>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-java</relativePath>
+        <relativePath>../</relativePath>
    </parent>

    <dependencies>
@@ -8,12 +8,11 @@
    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-8</name>
    <packaging>jar</packaging>
-
    <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-java</artifactId>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-java</relativePath>
+        <relativePath>../</relativePath>
    </parent>

    <dependencies>
@@ -12,3 +12,4 @@ This module contains articles about core Java features that have been introduced
 - [Introduction to Java 9 StackWalking API](https://www.baeldung.com/java-9-stackwalking-api)
 - [Java 9 Platform Logging API](https://www.baeldung.com/java-9-logging-api)
 - [Java 9 Reactive Streams](https://www.baeldung.com/java-9-reactive-streams)
+- [Multi-Release JAR Files with Maven](https://www.baeldung.com/maven-multi-release-jars)
@@ -28,8 +28,104 @@
            <version>${junit.platform.version}</version>
            <scope>test</scope>
        </dependency>
+        <dependency>
+            <groupId>org.awaitility</groupId>
+            <artifactId>awaitility</artifactId>
+            <version>${awaitility.version}</version>
+            <scope>test</scope>
+        </dependency>
    </dependencies>
-
+    <profiles>
+        <profile>
+            <id>incubator-features</id>
+            <build>
+                <finalName>core-java-9-new-features</finalName>
+                <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>${maven.compiler.target}</target>
+                            <compilerArgument>--add-modules=jdk.incubator.httpclient</compilerArgument>
+                        </configuration>
+                    </plugin>
+                    <plugin>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <configuration>
+                            <argLine>--add-modules=jdk.incubator.httpclient</argLine>
+                        </configuration>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+        <profile>
+            <id>mrjar-generation</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-compiler-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <id>compile-java-8</id>
+                                <goals>
+                                    <goal>compile</goal>
+                                </goals>
+                                <configuration>
+                                    <source>1.8</source>
+                                    <target>1.8</target>
+                                    <compileSourceRoots>
+                                        <compileSourceRoot>${project.basedir}/src/main/java8</compileSourceRoot>
+                                    </compileSourceRoots>
+                                </configuration>
+                            </execution>
+                            <execution>
+                                <id>compile-java-9</id>
+                                <phase>compile</phase>
+                                <goals>
+                                    <goal>compile</goal>
+                                </goals>
+                                <configuration>
+                                    <release>9</release>
+                                    <compileSourceRoots>
+                                        <compileSourceRoot>${project.basedir}/src/main/java9</compileSourceRoot>
+                                    </compileSourceRoots>
+                                    <outputDirectory>${project.build.outputDirectory}/META-INF/versions/9</outputDirectory>
+                                </configuration>
+                            </execution>
+                            <execution>
+                                <id>default-testCompile</id>
+                                <phase>test-compile</phase>
+                                <goals>
+                                    <goal>testCompile</goal>
+                                </goals>
+                                <configuration>
+                                    <skip>true</skip>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-jar-plugin</artifactId>
+                        <version>${maven-jar-plugin.version}</version>
+                        <configuration>
+                            <archive>
+                                <manifestEntries>
+                                    <Multi-Release>true</Multi-Release>
+                                </manifestEntries>
+                                <manifest>
+                                    <mainClass>com.baeldung.multireleaseapp.App</mainClass>
+                                </manifest>
+                            </archive>
+                        </configuration>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
    <build>
        <finalName>core-java-9-new-features</finalName>
        <plugins>
@@ -56,8 +152,10 @@
        <!-- testing -->
        <assertj.version>3.10.0</assertj.version>
        <junit.platform.version>1.2.0</junit.platform.version>
+        <awaitility.version>4.0.2</awaitility.version>
        <maven.compiler.source>1.9</maven.compiler.source>
        <maven.compiler.target>1.9</maven.compiler.target>
+        <maven-jar-plugin.version>3.2.0</maven-jar-plugin.version>
    </properties>

 </project>
@@ -0,0 +1,14 @@
+package com.baeldung.multireleaseapp;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class App {
+
+    private static final Logger logger = LoggerFactory.getLogger(App.class);
+
+    public static void main(String[] args) {
+        logger.info(String.format("Running on %s", new DefaultVersion().version()));
+    }
+
+}
@@ -0,0 +1,9 @@
+package com.baeldung.multireleaseapp;
+
+public class DefaultVersion implements Version {
+
+    @Override
+    public String version() {
+        return System.getProperty("java.version");
+    }
+}
@@ -0,0 +1,5 @@
+package com.baeldung.multireleaseapp;
+
+interface Version {
+    public String version();
+}
@@ -0,0 +1,9 @@
+package com.baeldung.multireleaseapp;
+
+public class DefaultVersion implements Version {
+
+    @Override
+    public String version() {
+        return Runtime.version().toString();
+    }
+}
@@ -24,7 +24,7 @@ import static org.junit.Assert.assertThat;
 /**
 * Created by adam.
 */
-public class HttpClientTest {
+public class HttpClientIntegrationTest {

    @Test
    public void shouldReturnSampleDataContentWhenConnectViaSystemProxy() throws IOException, InterruptedException, URISyntaxException {
@@ -55,7 +55,7 @@ public class HttpClientTest {
            .send(request, HttpResponse.BodyHandler.asString());

        assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_MOVED_PERM));
-        assertThat(response.body(), containsString("https://stackoverflow.com/"));
+        assertThat(response.body(), containsString(""));
    }

    @Test
@@ -22,7 +22,7 @@ import static org.junit.Assert.assertThat;
 /**
 * Created by adam.
 */
-public class HttpRequestTest {
+public class HttpRequestIntegrationTest {

    @Test
    public void shouldReturnStatusOKWhenSendGetRequest() throws IOException, InterruptedException, URISyntaxException {
@@ -18,7 +18,7 @@ import static org.junit.Assert.assertThat;
 /**
 * Created by adam.
 */
-public class HttpResponseTest {
+public class HttpResponseIntegrationTest {

    @Test
    public void shouldReturnStatusOKWhenSendGetRequest() throws IOException, InterruptedException, URISyntaxException {
@@ -5,10 +5,12 @@ import org.junit.Test;

 import java.util.List;
 import java.util.concurrent.SubmissionPublisher;
+import java.util.concurrent.TimeUnit;

-import static org.assertj.core.api.Java6Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.awaitility.Awaitility.await;

-public class ReactiveStreamsTest {
+public class ReactiveStreamsUnitTest {

    @Test
    public void givenPublisher_whenSubscribeToIt_thenShouldConsumeAllElements() throws InterruptedException {
@@ -25,7 +27,7 @@ public class ReactiveStreamsTest {

        //then

-        await().atMost(1000, TimeUnit.MILLISECONDS).until(
+        await().atMost(1000, TimeUnit.MILLISECONDS).untilAsserted(
                () -> assertThat(subscriber.consumedElements).containsExactlyElementsOf(items)
        );
    }
@@ -46,7 +48,7 @@ public class ReactiveStreamsTest {
        publisher.close();

        //then
-        await().atMost(1000, TimeUnit.MILLISECONDS).until(
+        await().atMost(1000, TimeUnit.MILLISECONDS).untilAsserted(
                () -> assertThat(subscriber.consumedElements).containsExactlyElementsOf(expectedResult)
        );
    }
@@ -66,7 +68,7 @@ public class ReactiveStreamsTest {
        publisher.close();

        //then
-        await().atMost(1000, TimeUnit.MILLISECONDS).until(
+        await().atMost(1000, TimeUnit.MILLISECONDS).untilAsserted(
                () -> assertThat(subscriber.consumedElements).containsExactlyElementsOf(expected)
        );
    }
@@ -1,106 +0,0 @@
-package com.baeldung.java9.varhandles;
-
-import org.junit.Test;
-
-import java.lang.invoke.MethodHandles;
-import java.lang.invoke.VarHandle;
-
-import static org.assertj.core.api.Assertions.assertThat;
-
-public class VariableHandlesTest {
-
-    public int publicTestVariable = 1;
-    private int privateTestVariable = 1;
-    public int variableToSet = 1;
-    public int variableToCompareAndSet = 1;
-    public int variableToGetAndAdd = 0;
-    public byte variableToBitwiseOr = 0;
-
-    @Test
-    public void whenVariableHandleForPublicVariableIsCreated_ThenItIsInitializedProperly() throws NoSuchFieldException, IllegalAccessException {
-        VarHandle publicIntHandle = MethodHandles
-          .lookup()
-          .in(VariableHandlesTest.class)
-          .findVarHandle(VariableHandlesTest.class, "publicTestVariable", int.class);
-
-        assertThat(publicIntHandle.coordinateTypes().size() == 1);
-        assertThat(publicIntHandle.coordinateTypes().get(0) == VariableHandles.class);
-
-    }
-
-    @Test
-    public void whenVariableHandleForPrivateVariableIsCreated_ThenItIsInitializedProperly() throws NoSuchFieldException, IllegalAccessException {
-        VarHandle privateIntHandle = MethodHandles
-          .privateLookupIn(VariableHandlesTest.class, MethodHandles.lookup())
-          .findVarHandle(VariableHandlesTest.class, "privateTestVariable", int.class);
-
-        assertThat(privateIntHandle.coordinateTypes().size() == 1);
-        assertThat(privateIntHandle.coordinateTypes().get(0) == VariableHandlesTest.class);
-
-    }
-
-    @Test
-    public void whenVariableHandleForArrayVariableIsCreated_ThenItIsInitializedProperly() throws NoSuchFieldException, IllegalAccessException {
-        VarHandle arrayVarHandle = MethodHandles
-          .arrayElementVarHandle(int[].class);
-
-        assertThat(arrayVarHandle.coordinateTypes().size() == 2);
-        assertThat(arrayVarHandle.coordinateTypes().get(0) == int[].class);
-    }
-
-    @Test
-    public void givenVarHandle_whenGetIsInvoked_ThenValueOfVariableIsReturned() throws NoSuchFieldException, IllegalAccessException {
-        VarHandle publicIntHandle = MethodHandles
-          .lookup()
-          .in(VariableHandlesTest.class)
-          .findVarHandle(VariableHandlesTest.class, "publicTestVariable", int.class);
-
-        assertThat((int) publicIntHandle.get(this) == 1);
-    }
-
-    @Test
-    public void givenVarHandle_whenSetIsInvoked_ThenValueOfVariableIsChanged() throws NoSuchFieldException, IllegalAccessException {
-        VarHandle publicIntHandle = MethodHandles
-          .lookup()
-          .in(VariableHandlesTest.class)
-          .findVarHandle(VariableHandlesTest.class, "variableToSet", int.class);
-        publicIntHandle.set(this, 15);
-
-        assertThat((int) publicIntHandle.get(this) == 15);
-    }
-
-    @Test
-    public void givenVarHandle_whenCompareAndSetIsInvoked_ThenValueOfVariableIsChanged() throws NoSuchFieldException, IllegalAccessException {
-        VarHandle publicIntHandle = MethodHandles
-          .lookup()
-          .in(VariableHandlesTest.class)
-          .findVarHandle(VariableHandlesTest.class, "variableToCompareAndSet", int.class);
-        publicIntHandle.compareAndSet(this, 1, 100);
-
-        assertThat((int) publicIntHandle.get(this) == 100);
-    }
-
-    @Test
-    public void givenVarHandle_whenGetAndAddIsInvoked_ThenValueOfVariableIsChanged() throws NoSuchFieldException, IllegalAccessException {
-        VarHandle publicIntHandle = MethodHandles
-          .lookup()
-          .in(VariableHandlesTest.class)
-          .findVarHandle(VariableHandlesTest.class, "variableToGetAndAdd", int.class);
-        int before = (int) publicIntHandle.getAndAdd(this, 200);
-
-        assertThat(before == 0);
-        assertThat((int) publicIntHandle.get(this) == 200);
-    }
-
-    @Test
-    public void givenVarHandle_whenGetAndBitwiseOrIsInvoked_ThenValueOfVariableIsChanged() throws NoSuchFieldException, IllegalAccessException {
-        VarHandle publicIntHandle = MethodHandles
-          .lookup()
-          .in(VariableHandlesTest.class)
-          .findVarHandle(VariableHandlesTest.class, "variableToBitwiseOr", byte.class);
-        byte before = (byte) publicIntHandle.getAndBitwiseOr(this, (byte) 127);
-
-        assertThat(before == 0);
-        assertThat(variableToBitwiseOr == 127);
-    }
-}
@@ -0,0 +1,105 @@
+package com.baeldung.java9.varhandles;
+
+import org.junit.Test;
+
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.VarHandle;
+
+import static org.junit.Assert.assertEquals;
+
+public class VariableHandlesUnitTest {
+
+    public int publicTestVariable = 1;
+    private int privateTestVariable = 1;
+    public int variableToSet = 1;
+    public int variableToCompareAndSet = 1;
+    public int variableToGetAndAdd = 0;
+    public byte variableToBitwiseOr = 0;
+
+    @Test
+    public void whenVariableHandleForPublicVariableIsCreated_ThenItIsInitializedProperly() throws NoSuchFieldException, IllegalAccessException {
+        VarHandle PUBLIC_TEST_VARIABLE = MethodHandles
+          .lookup()
+          .in(VariableHandlesUnitTest.class)
+          .findVarHandle(VariableHandlesUnitTest.class, "publicTestVariable", int.class);
+
+        assertEquals(1, PUBLIC_TEST_VARIABLE.coordinateTypes().size());
+        assertEquals(VariableHandlesUnitTest.class, PUBLIC_TEST_VARIABLE.coordinateTypes().get(0));
+    }
+
+    @Test
+    public void whenVariableHandleForPrivateVariableIsCreated_ThenItIsInitializedProperly() throws NoSuchFieldException, IllegalAccessException {
+        VarHandle PRIVATE_TEST_VARIABLE = MethodHandles
+          .privateLookupIn(VariableHandlesUnitTest.class, MethodHandles.lookup())
+          .findVarHandle(VariableHandlesUnitTest.class, "privateTestVariable", int.class);
+
+        assertEquals(1, PRIVATE_TEST_VARIABLE.coordinateTypes().size());
+        assertEquals(VariableHandlesUnitTest.class, PRIVATE_TEST_VARIABLE.coordinateTypes().get(0));
+    }
+
+    @Test
+    public void whenVariableHandleForArrayVariableIsCreated_ThenItIsInitializedProperly() throws NoSuchFieldException, IllegalAccessException {
+        VarHandle arrayVarHandle = MethodHandles
+          .arrayElementVarHandle(int[].class);
+
+        assertEquals(2, arrayVarHandle.coordinateTypes().size());
+        assertEquals(int[].class, arrayVarHandle.coordinateTypes().get(0));
+    }
+
+    @Test
+    public void givenVarHandle_whenGetIsInvoked_ThenValueOfVariableIsReturned() throws NoSuchFieldException, IllegalAccessException {
+        VarHandle PUBLIC_TEST_VARIABLE = MethodHandles
+          .lookup()
+          .in(VariableHandlesUnitTest.class)
+          .findVarHandle(VariableHandlesUnitTest.class, "publicTestVariable", int.class);
+
+        assertEquals(1, (int) PUBLIC_TEST_VARIABLE.get(this));
+    }
+
+    @Test
+    public void givenVarHandle_whenSetIsInvoked_ThenValueOfVariableIsChanged() throws NoSuchFieldException, IllegalAccessException {
+        VarHandle VARIABLE_TO_SET = MethodHandles
+          .lookup()
+          .in(VariableHandlesUnitTest.class)
+          .findVarHandle(VariableHandlesUnitTest.class, "variableToSet", int.class);
+
+        VARIABLE_TO_SET.set(this, 15);
+        assertEquals(15, (int) VARIABLE_TO_SET.get(this));
+    }
+
+    @Test
+    public void givenVarHandle_whenCompareAndSetIsInvoked_ThenValueOfVariableIsChanged() throws NoSuchFieldException, IllegalAccessException {
+        VarHandle VARIABLE_TO_COMPARE_AND_SET = MethodHandles
+          .lookup()
+          .in(VariableHandlesUnitTest.class)
+          .findVarHandle(VariableHandlesUnitTest.class, "variableToCompareAndSet", int.class);
+
+        VARIABLE_TO_COMPARE_AND_SET.compareAndSet(this, 1, 100);
+        assertEquals(100, (int) VARIABLE_TO_COMPARE_AND_SET.get(this));
+    }
+
+    @Test
+    public void givenVarHandle_whenGetAndAddIsInvoked_ThenValueOfVariableIsChanged() throws NoSuchFieldException, IllegalAccessException {
+        VarHandle VARIABLE_TO_GET_AND_ADD = MethodHandles
+          .lookup()
+          .in(VariableHandlesUnitTest.class)
+          .findVarHandle(VariableHandlesUnitTest.class, "variableToGetAndAdd", int.class);
+
+        int before = (int) VARIABLE_TO_GET_AND_ADD.getAndAdd(this, 200);
+
+        assertEquals(0, before);
+        assertEquals(200, (int) VARIABLE_TO_GET_AND_ADD.get(this));
+    }
+
+    @Test
+    public void givenVarHandle_whenGetAndBitwiseOrIsInvoked_ThenValueOfVariableIsChanged() throws NoSuchFieldException, IllegalAccessException {
+        VarHandle VARIABLE_TO_BITWISE_OR = MethodHandles
+          .lookup()
+          .in(VariableHandlesUnitTest.class)
+          .findVarHandle(VariableHandlesUnitTest.class, "variableToBitwiseOr", byte.class);
+        byte before = (byte) VARIABLE_TO_BITWISE_OR.getAndBitwiseOr(this, (byte) 127);
+
+        assertEquals(0, before);
+        assertEquals(127, (byte) VARIABLE_TO_BITWISE_OR.get(this));
+    }
+}
@@ -8,12 +8,11 @@
    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-9-streams</name>
    <packaging>jar</packaging>
-
    <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-java</artifactId>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-java</relativePath>
+        <relativePath>../</relativePath>
    </parent>

    <build>
@@ -10,10 +10,10 @@
    <packaging>jar</packaging>

    <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-java</artifactId>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-java</relativePath>
+        <relativePath>../</relativePath>
    </parent>

    <build>
@@ -5,7 +5,7 @@
    <parent>
        <artifactId>core-java-modules</artifactId>
        <groupId>com.baeldung.core-java-modules</groupId>
-        <version>1.0.0-SNAPSHOT</version>
+        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

@@ -5,7 +5,7 @@
    <parent>
        <artifactId>core-java-modules</artifactId>
        <groupId>com.baeldung.core-java-modules</groupId>
-        <version>1.0.0-SNAPSHOT</version>
+        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

@@ -5,7 +5,7 @@
    <parent>
        <artifactId>core-java-modules</artifactId>
        <groupId>com.baeldung.core-java-modules</groupId>
-        <version>1.0.0-SNAPSHOT</version>
+        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

@@ -5,7 +5,7 @@
    <parent>
        <artifactId>core-java-modules</artifactId>
        <groupId>com.baeldung.core-java-modules</groupId>
-        <version>1.0.0-SNAPSHOT</version>
+        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

@@ -5,7 +5,7 @@
    <parent>
        <artifactId>core-java-modules</artifactId>
        <groupId>com.baeldung.core-java-modules</groupId>
-        <version>1.0.0-SNAPSHOT</version>
+        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

@@ -5,8 +5,8 @@
    <parent>
        <artifactId>core-java-modules</artifactId>
        <groupId>com.baeldung.core-java-modules</groupId>
-        <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../pom.xml</relativePath>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../</relativePath>
    </parent>
    <modelVersion>4.0.0</modelVersion>

@@ -7,12 +7,11 @@
    <artifactId>core-java-collections-2</artifactId>
    <name>core-java-collections-2</name>
    <packaging>jar</packaging>
-
    <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-java</artifactId>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-java</relativePath>
+        <relativePath>../</relativePath>
    </parent>

    <dependencies>
@@ -9,3 +9,4 @@
 - [Differences Between Collection.clear() and Collection.removeAll()](https://www.baeldung.com/java-collection-clear-vs-removeall)
 - [Performance of contains() in a HashSet vs ArrayList](https://www.baeldung.com/java-hashset-arraylist-contains-performance)
 - [Fail-Safe Iterator vs Fail-Fast Iterator](https://www.baeldung.com/java-fail-safe-vs-fail-fast-iterator)
+- [Quick Guide to the Java Stack](https://www.baeldung.com/java-stack)
@@ -8,12 +8,11 @@
    <version>0.1.0-SNAPSHOT</version>
    <name>core-java-collections-3</name>
    <packaging>jar</packaging>
-
    <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-java</artifactId>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-java</relativePath>
+        <relativePath>../</relativePath>
    </parent>

    <dependencies>
--- a/Show More
+++ b/Show More