[Java] Thinking in Java exercise 2.2

Topic

Create a "Hello, World" program, compile it with Javac, and then run it in Java.

Program

1  Public class ex2_2 {2      Public Static void Main (string[] args) {3         System.out.println ("Hello, World"); 4     }5 }

Compiling and running

Win+r Run cmd

D: Change to D drive, CD (space) file path, arrival program Ex2_2.java Directory

Format of the Javac command: javac-d destdir srcfile (Destdir:java bytecode storage path Srcfile:.java source file location)-D: Used to specify the path of the class file after compilation, if omitted, it is stored in the default path, the current directory is available "." Instead, such as javac-d. Srcfile Enter HERE

1 javac-d. Ex2_2.java

Or

javac-d D:\eclipse-workspace\HW\src D:\eclipse-workspace\HW\src\Ex2_2.java

Generates a. class file. Run it again in Java.

Format of the Java command: Java srcfile

Enter HERE

1 Java ex2_2

Get!

[Java] Thinking in Java exercise 2.2