In this tutorial you’ll learn how to work with static member classes and the three types of inner classes in your Java programs. What you’ll learn in this Java tutorial About static classes in ...

The difference between abstract classes and interfaces has long vexed Java developers. Find out how Java 8's default methods introduce both new complexity and new options to that familiar ...

Traditional Java 8 Predicate example While the Java 8 Predicate is a functional interface, there's nothing to stop a developer from using it in a traditional manner. Here's a Java Predicate example ...

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 ...

When the class is executed, the result is the text string lambda-tutorial.txt written to the console. Example UnaryOperator Lambda expression If you implement the UnaryOperator interface with a ...