how to write Hello World of Java on Windows , in "cmd"

After installed of Java environment, it's time to code our first Java program - helloworld.

The first exercise of helloworld we create and compile in "cmd" (DOS Prompt) environment.

- Create a text file helloworld.java, using any editor program you like (notepad or notepad++).

- Entent the code, and save it:

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public class helloworld {  public static void main(String[] args) {  System.out.println("Hello World!"); } }

helloworld.java

- Start a "cmd" window in Windows 8, refer to the post "Run 'cmd' in Windows 8" if you don't know how. Change to the directory of helloworld.java.

- Type the command to compile the java program:
javac helloworld.java

- Type the command to run the compiled class:
java helloworld

- If your JDK environment is set properly, the output should be:
Hello World!



*** If you cannot run javac/java due to missing in path setting, refer to the post "Set PATH for JDK 7 on Windows  ".