Java source file is composed of three parts: the first part is the class or external structure, such as "class Student{}"; the second part is the main() method, also called the entry of the program; the third part Part of the code is written in the main method.
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Java source file is composed of three parts,
The first part is a class or external structure:
Example:
class Student{
}The second part It is the main method, also called the entrance of the program
There are three points that everyone needs to pay attention to when learning:
The third part is writing the code
There are three points that everyone needs to pay attention to here:
1. The current code is written in the main method ;
2. You can write as many statements as you like, and the statements end with an English semicolon;
3. Suggestion: Write one statement per line.
The final output statement,
System.out.print(“大小写字母、数字、汉字以及特殊符号，但是输出后不换行”); System.out.println(“输出内容同上，但是输出后换行”);
There is another point that needs to be learned, that is, comments, the following two points:
1. Function: explanation, in the program It is not executed in the program, mainly to increase the readability of the program
2. Category:
单行注释// 多行注释/* 注释内容 */ 文档注释/** 注释内容 */
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