J: drive : Java Glossary


J: drive
You may have been puzzled by links in the Java glossary to the J: disk drive. This refers to the drive where you store your Java stuff, i.e. JDK (Java Development Kit), EE (Enterprise Edition) and possibly a mirror copy of the mindprod website in J:\mindprod\. You would map it to the drive where this stuff really exists, e.g. C: or E:.

Why have a J: Drive?

If you map your J: drive to whatever drive you installed the JDK, then you can use the J: links in the Java glossary to rapidly navigate the documentation on your local hard disk. e.g.

Learning More

Oracle’s Technote Guide on 2D Drawing : available:

or a link like this: J:\mindprod\jgloss\jdk.html into your local hard disk mirror of the Java glossary kept up-to-date via the Replicator. This way you can browse the Java Glossary and the Oracle documentation rapidly, even when you are offline.

Browser Support for the J: links

For security reasons, most browsers deliberately do not supported the J: links, directly. However, you can indirectly use the link with: All browsers also directly support the J: links with a single click, but only if you have downloaded the mindprod website with the replicator and are clicking a J: link in a downloaded document. Only IE directly supports the link whether you download the mindprod website or use it online.

Setting Up Your J: Drive

Lets assume you installed the JDK on drive E:. To map your entire E: drive so you can also access it as J:, first click My Computer ⇒ right click E: properties ⇒ sharing ⇒ share this folder ⇒ ok. Then click My Computer ⇒ right click E: ⇒ open ⇒ tools ⇒ map network drive. Choose J: as the drive and type in the name
as the share name where roedy is your computer’s name. Infuriatingly, you can’t simply browse to the E:\ directory.

Alternatively you could compose a bat file like this and install it as your login script:

subst J: E:\
SUBST is quicker and does not fail when other network connections fail. You can undo the subst, with subst J: /D

While you are at it you can create fake drive shortcuts to directories you use often, or you can use subst to dynamically assign the P: and Q: drives on the fly when you are working with pairs of directories to save you a lot of typing.

The best way to use the J: drive feature is to download the website using the Replicator and put it in a directory called \mindprod on your J: drive or a drive you subst to be your J: drive.

Similarly you can set up an X: virtual drive which I map to my F: drive where I keep all my executables. This website presumes you store your executables on X:.

Here is the batch file I use to set up the associations, which I run automatically on every boot:

This page is posted
on the web at:


Optional Replicator mirror
of mindprod.com
on local hard disk J:

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