Running a Java Program from Command Prompt

http://www.skylit.com/javamethods/faqs/javaindos.html

Eclipse has its own compiler and can run on a non-JDK JRE. So, I gotta download JDK by myself.

Run Command Prompt (found under All Programs/Accessories in the Start menu).  Type

C:\> cd \mywork

This makes C:\mywork the current directory.

C:\mywork> dir

This displays the directory contents.  You should see HelloWorld.java among the files.

C:\mywork> set path=%path%;C:\Program Files\Java\jdk1.5.0_09\bin

This tells the system where to find JDK programs.

C:\mywork> javac HelloWorld.java

This runs javac.exe, the compiler.  You should see nothing but the next system prompt...

C:\mywork> dir

javac has created the HelloWorld.class file.  You should see HelloWorld.java andHelloWorld.class among the files.

C:\mywork> java HelloWorld

This runs the Java interpreter.  You should see the program output:

Hello, World!

My java path:

C:\Program Files\Java\jdk1.7.0_02\bin

* The compiler is smart. It can detect the relation of class. So, just javac the .java with main() and then it will compile the related .java