Java Editing and Compiling with a Color-Highlighting Editor

Java Editing and Compiling with a Color-Highlighting Editor

Problem

You are tired of command-line tools but not ready for an IDE. 

Solution 

Use a color-highlighting editor.

EXPLAIN

It’s less than an IDE (see the next recipe), but more than a command line. What is it? It’s an editor with Java support. Tools such as TextPad (http://www.textpad.com), Visual Slick Edit, and others are low-cost windowed editors (primarily for Windows) that have some amount of Java recognition built-in and the ability to compile from within the editor. TextPad recognizes quite a number of file types, including batch files and shell scripts, C, C++, Java, JSP, JavaScript, and many others.

For each of these, it uses color highlighting to show which part of the file being edited comprises keywords, comments, quoted strings, and so on. This is very useful in spotting when part of your code has been swallowed up by an unterminated /* comment or a missing quote. While this isn’t the same as the deep understanding of Java that a full IDE might possess, experience has shown that it definitely aids programmer productivity. TextPad also has a “compile Java” command and a “run external program” command.

Both of these have the advantage of capturing the entire command output into a window, which may be easier to scroll than a command-line window on some platforms. On the other hand, you don’t see the command results until the program terminates, which can be most uncomfortable if your GUI application throws an exception before it puts up its main window. Despite this minor drawback, TextPad is a very useful tool. Other editors that include color highlighting include vim (an enhanced version of the Unix tool vi, available for Windows and Unix platforms from http://www.vim.org), the ever-popular Emacs editor, and many others.

And speaking of Emacs, since it is so extensible, it’s natural that people have built enhanced Java capabilities for it. One example is JDEE (Java Development Environment for Emacs), an Emacs “major mode” (jde-mode, based on c-mode) with a set of menu items such as Generate Getters/Setters. You could say that JDEE is in between using a Color-Highlighting Editor and an IDE. The URLfor JDEE is http://jdee. sunsite.dk/.

Even without JDEE, Emacs features dabbrev-expand, which does class and method name completion. It is, however, based on what’s in your current edit buffers, so it doesn’t know about classes in the standard API or in external Jars. For that level of functionality, you have to turn to a full-blown IDE.