The Java 2 SDK organizes its vast collection of classes and interfaces into a tree-like hierarchy of packages within packages, which is equivalent to directories within directories.

So to learn Java lambda syntax, you need to be familiar with its three component parts: The argument list The arrow The method body To apply these concepts, we first need a functional interface. A ...

For example, when the user presses a key, the MIDP runtime calls the Canvas.keyPressed() method and passes the key code. By default, the keyPressed() method does nothing. It just ignores the event.