The default directory for the JDK in Windows:
C:\Program Files\Java\jdk1.6.0\bin
Four important subdirectories of the JDK
| Directory | Description |
| bin | The Java development tools and commands |
| jre | The root directory of the Java Runtime Environment (JRE) |
| lib | Additional libraries of code for the development tools |
| docs (optional) | The online documentation that you can download |
Two important files stored in the JDK directory
| File | Description |
| readme.html | An HTML page that provides information on Java 2, including system requirements, features, and documentation links. |
| src.zip | A zip file containing the source code for the J2SE API. |