Here's how to make classes, fields, methods, constructors, and objects work together in your Java programs.

Reference objects aren't just useful when memory is at a premium; they can also be used to provide slick caching abilities to any application.

Object-oriented systems are usually partitioned into layers of related responsibilities and only dependencies in one direction are allowed, from higher layers (more specific, less reusable) to lower ...

Copying objects is a common Java programming operation that has one serious trap. Here's how to avoid copying from an object reference and only copy the instance and values you want.

Sealed classes in Java let developers limit the creation and use of subclasses and preserve the class hierarchy. Here is how sealed classes in Java work.

Add the necessary import statements to your class file. You will need a variety of Android Java classes added to your class file in order to carry out the image importing and Bitmap saving process.