How to use abstract class in Java

Use setattr() to add attributes to a class at runtime

An attribute is another term for a field . It’s typically a public constant or a public variable that can be accessed directly. In this particular case, the array in Java is actually an object and you are accessing the public constant value that represents the length of the array.12 Ara 2011

In object-oriented programming with classes, a class variable is any variable declared with the static modifier of which a single copy exists, regardless of how many instances of the class exist . Note that in Java, the terms “field” and “variable” are used interchangeably for member variable.