added log4j2

.project

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>app-with-log4j</name>
+	<comment>Project app-with-log4j created by Buildship.</comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.buildship.core.gradleprojectbuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.buildship.core.gradleprojectnature</nature>
+	</natures>
+	<filteredResources>
+		<filter>
+			<id>1628861157491</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
+</projectDescription>

.settings/org.eclipse.buildship.core.prefs

@@ -0,0 +1,13 @@
+arguments=
+auto.sync=false
+build.scans.enabled=false
+connection.gradle.distribution=GRADLE_DISTRIBUTION(WRAPPER)
+connection.project.dir=
+eclipse.preferences.version=1
+gradle.user.home=
+java.home=C\:/Program Files/Eclipse Foundation/jdk-11.0.12.7-hotspot
+jvm.arguments=
+offline.mode=false
+override.workspace.settings=true
+show.console.view=true
+show.executions.view=true

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "java.configuration.updateBuildConfiguration": "automatic"
+}

app/build.gradle

@@ -22,6 +22,9 @@ dependencies {
 
     // This dependency is used by the application.
     implementation 'com.google.guava:guava:30.1-jre'
+
+    compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.11.2'
+    compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.11.2'
 }
 
 application {

app/src/main/java/app/with/log4j/App.java

@@ -3,12 +3,23 @@
  */
 package app.with.log4j;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
 public class App {
+
+    private static final Logger logger = LogManager.getLogger(Log4j2Usage.class.getName());
+
     public String getGreeting() {
         return "Hello World!";
     }
 
     public static void main(String[] args) {
         System.out.println(new App().getGreeting());
+
+        logger.info("Info: Log4j2 Usage");
+        logger.debug("Debug: Program has finished successfully");
+        logger.error("Error: Program has errors");
+
     }
 }

app/src/main/resources/log4j2.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="INFO">
+    <Appenders>
+        <Console name="console" target="SYSTEM_OUT">
+            <PatternLayout
+                    pattern="[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n" />
+        </Console>
+    </Appenders>
+    <Loggers>
+        <Root level="debug" additivity="false">
+            <AppenderRef ref="console" />
+        </Root>
+    </Loggers>
+</Configuration>