byte buddy getting started

<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">
<modelVersion>4.0.0</modelVersion>
<groupId>com.pierre</groupId>
<artifactId>bytebuddytest</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>net.bytebuddy</groupId>
<artifactId>byte-buddy</artifactId>
<version>1.7.0</version>
</dependency>
</dependencies>
</project>

import net.bytebuddy.ByteBuddy;
import net.bytebuddy.implementation.FixedValue;
import net.bytebuddy.matcher.ElementMatchers;

public class HelloWorld {
 public static void main(String[] args) throws InstantiationException, IllegalAccessException {
  HelloWorld helloWorld = new HelloWorld();
  helloWorld.testHello();

 }

 public void testHello() throws InstantiationException, IllegalAccessException {
  Class dynamicType = new ByteBuddy().subclass(Object.class).method(ElementMatchers.named("toString"))
    .intercept(FixedValue.value("Hello World!")).make().load(getClass().getClassLoader()).getLoaded();

  System.out.println(dynamicType.newInstance().toString());
 }
}