The Repeated Free Fall reliability class is represented as a grade from A (most drop resistant) to E (least drop resistant) The class is determined by measuring the number of drops that a smartphone ...

The Energy efficiency class is a key rating on the European Commission's Energy Label, which is mandatory for all mobile ...

Java 11 is getting long in the tooth, so many developers are moving to the next oldest version that's still supported, Java 17. Here's what's different.

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.

There are benefits and drawbacks to Java's Iterator vs. ListIterator interface. Learn how to make the right choice when you choose between them.

The release of Java SE 15 in Sept 2020 will introduce "sealed classes" (JEP 360) as a preview feature. A sealed class is a class or interface which restricts which other classes or interfaces may ...

More about Java interfaces For an introduction to Java interfaces, including the difference between classes and interfaces, see my Java 101 tutorial Working with interfaces in Java.

The Java Tutorial goes on to list bullets for when an abstract class should be considered and for when an interface should be considered. Unsurprisingly, these are derived from the previously ...