What does abstract log mean?

abstract, an English word, adjective, noun and verb, means "purely theoretical" when used as an adjective; Abstract; Abstract ",as a noun means" abstract; Abstract; An abstract concept; Abstract works of art ",when used as a verb, means" abstract; Extract; Abstraction; Quit; Transfer; Make you absent-minded. "

phrase collocation

abstract system[ self] abstract system; Abstract system; Translation

abstract thinking abstract thinking; Abstract thinking; Sexual thinking

abstract painting; Abstract painting; Abstract oil painting; Abstract painting hotel decoration painting

abstract good abstract product

English Abstract English abstract; English abstracts; English abstract; Chinese abstract

abstract space; Abstract space; Detailed

abstract science theory science

Abstract unit[ number] abstract unit

abstract invoice; Simplified invoice; Abstract invoice; Brief

extended data

abstract class

When a class is declared abstract, it is called an abstract class. The so-called abstract class is a class without instance objects.

abstract classes are defined in p>java for the same reason. Abstract class is a collection of public attributes of all its subclasses, so one of the advantages of abstract class is to make full use of public attributes to improve the efficiency of developing and maintaining programs.

abstract method

as a modifier, abstract declares an abstract class that has no concrete object and exists for the hierarchical relationship of organizational concepts; As a class method modifier, abstract declares an abstract method with only a method header, but no specific method body and operation implementation.

such as:

abstract boolean goVacation (int days);

It can be seen that the abstract method only has the declaration of the method header, and a semicolon is used instead of the definition of the method body; As for the concrete implementation of the method body, it is completed by different subclasses of the current class in their respective class definitions.

Baidu encyclopedia -abstract (English word)

Baidu encyclopedia -abstract (abstract modifier)