In this Java 101 tutorial, I’ve explained how interfaces differ from classes, and showed you how to declare, implement, and extend interfaces in your Java programs.

As a result, you specify Date instead of java.util.Date in each place that class name appears in source code. For example, when creating a Date object, specify Date d = new Date (); instead of ...

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 ...