For example, the java.lang.Comparable interface is not a marker interface, but a functional interface that has one method: compareTo. You do not need to create a marker interface for classes that ...

Do you need to know how to sort Java objects in a collection, array, or map? Here's how to use the Comparable and Comparator interfaces and avoid ClassCastExceptions.

About This Java program demonstrates a simple bank account management system using the ArrayList and Comparable interface from the Java Collections Framework.