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. Programmers frequently need to ...

First-class objects Instances of the PersistenceCapable classes that have JDO identity represent first-class objects; these objects are stored in a data store with their associated second-class ...

If you're not familiar with object-oriented programming, some of the concepts can be hard to understand, especially if you're a longtime procedural language programmer. Follow along as we take a look ...

Classic programming books continue guiding developers in object-oriented design.Design patterns, refactoring methods, and clean coding improve sof ...

Community driven content discussing all aspects of software development from DevOps to design patterns. Heap dump is a snapshot of the Java memory. It contains information about the Java objects and ...