day02 Java Basics

1. The keywords in Java are lowercase.

2. Keywords in Java

3. Comments in Java are divided into: single-line comments, multiline comments, document comments

The document comment will be parsed by the Javadoc tool to generate a manual.

4. Constants in Java are divided into literal constants and custom constants.

Literal constants are also divided into string constants, integer constants, decimal constants, character constants, Boolean constants, and empty constants.

5, the relationship between the original code, the inverse code and the complement in the computer

6. Data type

7, type conversion surface questions

Interview Question 1

Interview Question 2

So: The output should be-126.

8. ' A '->97; ' in ASCII A '->65; ' 0 '->48.

day02 Java Basics