I have the UML for the java program that I'm supposed to create. This is what my professor says:

Review the attached UML diagram, and build a Java program to apply your knowledge by designing the required interfaces and the classes.

Create the main method and declare three objects, one of type Book, one of type Journal, and one for a Chapter.

Call all the methods and display the references details using one of the Formats.

I'm honestly so lost and I'm not sure where to start.

IFormattableReference for matMLA for matAPA for mat Chicaao Reference author :name pubDate Calendar setAuthor setTitle setPubDate(m,d,y) set PubDatem,y) set PubDately) getAuthor getTitle get Pub Date( m,d,y) getPubDate(m,y] getPubDately) Book publisher volume number pages set Source setVolume set Number setPages get Source getVolume get Number getPages state country setPublisher set State getPublisher get City get State etCountr Chapter editor name () bookTitle pages setEditor set BookTitle getEditor getBookTitle getPages