property read from application.properties returning null - spring-boot

Question

I am new to springboot and i am trying to read the property value from the application.properties file in the location(src/main/resources). But it always return null. I need help for the same. Attaching the classes and property files.
Please note: I have tried different ways from "https://www.baeldung.com/properties-with-spring "How to access a value defined in the application.properties file in Spring Boot".
But this is not helping in getting the value from the application.properties file.
#SpringBootApplication
#EnableAutoConfiguration
#PropertySource("classpath:application.properties")
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
SampleTest ap=new SampleTest();
System.out.println("+++++++++++++ "+ap.returnvalue());
}
#Configuration
#PropertySource("classpath:application.properties")
public class SampleTest {
#Value("${testValue}")
String value1;
public String returnvalue()
{
return value1;
}
}
application.properties file
testValue=Value from application
pom.xml
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>ReadValue</groupId>
<artifactId>com.read.vale</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>com.read.vale</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

Answer 1

Try this:
public static void main(String[] args) {
ApplicationContext ctx = SpringApplication.run(Application.class, args);
SampleTest ap = ctx.getBean(SampleTest.class);
System.out.println("+++++++++++++ "+ap.returnvalue());
}