updating logic 3rd time

mono.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter-data-mongodb-reactive:2.7.7" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter:2.7.7" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter-logging:2.7.7" level="project" />
+    <orderEntry type="library" name="Maven: ch.qos.logback:logback-classic:1.2.11" level="project" />
+    <orderEntry type="library" name="Maven: ch.qos.logback:logback-core:1.2.11" level="project" />
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+    <orderEntry type="library" name="Maven: org.apache.logging.log4j:log4j-api:2.17.2" level="project" />
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+    <orderEntry type="library" name="Maven: jakarta.annotation:jakarta.annotation-api:1.3.5" level="project" />
+    <orderEntry type="library" name="Maven: org.yaml:snakeyaml:1.30" level="project" />
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+    <orderEntry type="library" name="Maven: org.reactivestreams:reactive-streams:1.0.4" level="project" />
+    <orderEntry type="library" name="Maven: org.mongodb:mongodb-driver-reactivestreams:4.6.1" level="project" />
+    <orderEntry type="library" name="Maven: org.mongodb:bson:4.6.1" level="project" />
+    <orderEntry type="library" name="Maven: org.mongodb:mongodb-driver-core:4.6.1" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Maven: org.mongodb:bson-record-codec:4.6.1" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.data:spring-data-mongodb:3.4.6" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-tx:5.3.24" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-context:5.3.24" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-aop:5.3.24" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-beans:5.3.24" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-expression:5.3.24" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.data:spring-data-commons:2.7.6" level="project" />
+    <orderEntry type="library" name="Maven: org.slf4j:slf4j-api:1.7.36" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter-webflux:2.7.7" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter-json:2.7.7" level="project" />
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+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.core:jackson-annotations:2.13.4" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.core:jackson-core:2.13.4" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.13.4" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.13.4" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.module:jackson-module-parameter-names:2.13.4" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter-reactor-netty:2.7.7" level="project" />
+    <orderEntry type="library" name="Maven: io.projectreactor.netty:reactor-netty-http:1.0.26" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-codec-http:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-common:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-buffer:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-transport:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-codec:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-handler:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-codec-http2:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-resolver-dns:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-resolver:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-codec-dns:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-resolver-dns-native-macos:osx-x86_64:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-resolver-dns-classes-macos:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-transport-native-epoll:linux-x86_64:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-transport-native-unix-common:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-transport-classes-epoll:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.projectreactor.netty:reactor-netty-core:1.0.26" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-handler-proxy:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-codec-socks:4.1.86.Final" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-web:5.3.24" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-webflux:5.3.24" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Maven: org.springframework.boot:spring-boot-devtools:2.7.7" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot:2.7.7" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-autoconfigure:2.7.7" level="project" />
+    <orderEntry type="library" name="Maven: org.projectlombok:lombok:1.18.24" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.springframework.boot:spring-boot-starter-test:2.7.7" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.springframework.boot:spring-boot-test:2.7.7" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.springframework.boot:spring-boot-test-autoconfigure:2.7.7" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: com.jayway.jsonpath:json-path:2.7.0" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: net.minidev:json-smart:2.4.8" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: net.minidev:accessors-smart:2.4.8" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.ow2.asm:asm:9.1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: jakarta.xml.bind:jakarta.xml.bind-api:2.3.3" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: jakarta.activation:jakarta.activation-api:1.2.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.assertj:assertj-core:3.22.0" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest:2.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter:5.8.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-api:5.8.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.opentest4j:opentest4j:1.2.0" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-commons:1.8.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.apiguardian:apiguardian-api:1.1.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-params:5.8.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-engine:5.8.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-engine:1.8.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.mockito:mockito-core:4.5.1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: net.bytebuddy:byte-buddy:1.12.20" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: net.bytebuddy:byte-buddy-agent:1.12.20" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.objenesis:objenesis:3.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.mockito:mockito-junit-jupiter:4.5.1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.skyscreamer:jsonassert:1.5.1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: com.vaadin.external.google:android-json:0.0.20131108.vaadin1" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-core:5.3.24" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-jcl:5.3.24" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.springframework:spring-test:5.3.24" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.xmlunit:xmlunit-core:2.9.0" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: io.projectreactor:reactor-test:3.4.26" level="project" />
+    <orderEntry type="library" name="Maven: com.google.code.gson:gson:2.10.1" level="project" />
+  </component>
+</module>
\ No newline at end of file

pom.xml

@@ -47,7 +47,12 @@
 			<artifactId>reactor-test</artifactId>
 			<scope>test</scope>
 		</dependency>
-	</dependencies>
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>2.10.1</version>
+        </dependency>
+    </dependencies>
 
 	<build>
 		<plugins>

src/main/java/com/example/mono/controller/UserController.java

 package com.example.mono.controller;
 
-import com.example.mono.model.User;
+import com.example.mono.entity.User;
 import com.example.mono.service.UserService;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.HttpStatus;

src/main/java/com/example/mono/model/User.java → src/main/java/com/example/mono/entity/User.java

-package com.example.mono.model;
+package com.example.mono.entity;
 
 import lombok.AllArgsConstructor;
 import lombok.Data;

src/main/java/com/example/mono/repository/UserRepository.java

 package com.example.mono.repository;
 
-import com.example.mono.model.User;
+import com.example.mono.entity.User;
 import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
 import org.springframework.stereotype.Repository;
 

src/main/java/com/example/mono/service/UserService.java

 package com.example.mono.service;
 
-import com.example.mono.model.User;
+import com.example.mono.entity.User;
 import com.example.mono.repository.UserRepository;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
-import org.springframework.data.mongodb.core.ReactiveMongoTemplate;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import reactor.core.publisher.Flux;

src/main/java/com/example/mono/tmp.java

+package com.example.mono;
+
+import java.util.Hashtable;
+
+public class tmp implements Sayable {
+        public void say(String msg) {
+            System.out.println(msg);
+        }
+public static void main(String[] args) {
+    Hashtable<String, String> hashtable = new Hashtable<>();
+
+    // Adding Key and Value pairs to Hashtable
+    hashtable.put("Bird1","Pigeon");
+    hashtable.put("Bird2","BlueBird");
+    hashtable.put("Bird3","Swan");
+    hashtable.put("Bird2","Parrot");
+    hashtable.put("Bird1","Sparrow");
+    System.out.println(hashtable);
+
+    }
+}
+
+