Lesson Two: Java basic syntax

Each programming language has its own unique grammatical rules, but as the C language of "the father of modern programming languages", many things in C are similar to other programming languages.

Each language has its own identifier, and the identifier of a language is not many, but each has its own role.

Data, each language is data. So the data type is a very basic thing, in Java the data type is only 11, which includes eight basic types and three reference types. Of the eight basic data types, except for the integer, floating-point, and character types that exist in the C language, the Java language has a Boolean type that only has a true/False Boolean.

Variables: variables are indispensable for each programming language, stored value, value. are inseparable from variables, and Java's naming rules are very simple, you cannot start with a number, you cannot use a reserved word in the Java language, a keyword, you cannot start with any symbol other than $ and underscore.

Constants: Constants are fixed values in a programming language, and constants are not changed from the moment they are defined. The keyword that defines a constant is final, and the name of the defined constant must also be capitalized in all English.

Operations are indispensable to every programming language, and operators are the way we use operations in writing, knowing that the meaning of each operator is the premise of using operators. In addition to the already familiar operators in C, in Java, there are several additional operators, such as: Shift operators,>>,<<,>>>; short-circuiting and &&, short-circuiting or | | ; comparison operator: instanceof;

Lesson Two: Java basic syntax