BAEL-5158: Sample App and Unit test for finding ObjectMapper class in a jar.

core-java-modules/core-java-finding-class/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles
+
+[Find All Jars Containing Given Class](https://baeldung.com/find-all-jars-containing-given-class/)

core-java-modules/core-java-finding-class/pom.xml

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+<?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">
+    <groupId>com.baeldung.jar</groupId>
+    <artifactId>core-java-finding-class</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>core-java-finding-class</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>
+        <maven.compiler.source>8</maven.compiler.source>
+        <maven.compiler.target>8</maven.compiler.target>
+        <jackson.version>2.13.1</jackson.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+    </dependencies>
+</project>

core-java-modules/core-java-finding-class/src/main/java/com/baeldung/jar/App.java

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+package com.baeldung.jar;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.net.URL;
+
+public class App {
+
+    public static String findObjectMapperClass() {
+        Class klass = ObjectMapper.class;
+        URL path = klass.getProtectionDomain().getCodeSource().getLocation();
+        return path.toString();
+    }
+
+    public static void main(String[] args) {
+        System.out.println(findObjectMapperClass());
+    }
+}

core-java-modules/core-java-finding-class/src/test/java/com/baeldung/jar/AppUnitTest.java

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+package com.baeldung.jar;
+
+import org.junit.Assert;
+import org.junit.jupiter.api.Test;
+
+public class AppUnitTest {
+
+    @Test
+    public void findClassTest(){
+        Assert.assertTrue(App.findObjectMapperClass().endsWith("jackson-databind-2.13.1.jar"));
+    }
+}

core-java-modules/pom.xml

@@ -118,6 +118,7 @@
         <module>core-java-regex-2</module>
         <module>core-java-uuid</module>
         <module>pre-jpms</module>
+        <module>core-java-finding-class</module>
     </modules>
 
     <dependencyManagement>