Java format specification and usage of annotations

/*

Requirements: Demo A Hello World Java applet

Ideas:

1. Define a class. Because Java programs are defined in a class, Java programs exist in the form of classes, and the form of the class is actually the final embodiment of the bytecode

2. Define a main function. Allows the class to run independently.

3. Use the output statement. You can have the results of your program displayed on the console.

Steps:

1. Define the class and take a more readable class name.

2. Main function: public static void Main (string[] args). This is the fixed format that the JVM recognizes.

3. Output statement: System.out.println ("Output content");

* * Notice: Code is just a form of thought

*/

Class Demo

{

Define a main function to ensure that the program runs independently.

public static void Main (string[] args)

{

System.out.println ("Hello world!"); The output statement format, LN can act as a line break.

}

}

Java format specification and usage of annotations