Abstract Window Toolkit

Import statements are used to access the Java packages to be used in a program.
A token is the smallest unit in a program. There are five categories of tokens:
Identifiers
Keywords
Separators
Literals
Operators
Class declaration only creates a template and not an actual object.
Objects are instances of a class and have physical reality.
Method is the actual implementation of an operation on an object.

Từ khóa: Abstract Window Toolkit, Class declaration, Import statements, lập trình java, lập trình máy tính, ngôn ngữ lập trình