Java Tools Section Index | Page 3

Greg Lindholm points out: ANTLR doesn't have a way of specifing start-of-line as part of a rule. Once you have entered a rule you can use a sematic predicate to check what column your at, but t...more

A parse tree is a record of the rules (and tokens) used to match some input text whereas a syntax tree records the structure of the input and is insensitive to the grammar that produced it. Note ...more

Why do I get the error org.xml.sax.SAXParseException : Element type "web-app" must be declared when starting my web application? It has a web-app element already!

Use XML character entity references to escape. character reference < &lt; > &gt; " &quot; & &amp; ...more

According to the Javadoc for IndexReader maxDoc() method "returns one greater than the largest possible document number". In other words, the number returned by maxDoc() does not necessarily matc...more

I have now written my own ant logger class to filter out all verbose messages except for the "File(s) to be compiled" message, which lists them all. Here is my code; if anyone wants to use it, fe...more

"Refactoring is the process of changing a software system in such a way that it does not alter the external behavior of the code yet improves its internal structure. It is a disciplined way to cl...more

Unfortunately at the moment you can't implement this without resorting to using <exec> to a command-line script or some other roundabout way. It appears that in Ant 1.5 that filesets will a...more

If you're using Ant 1.4.1 or greater, the <condition> task works great. Here's an example that ought to give you what you need: <project basedir="." default="test"> <target nam...more

Associate file types How can I associate .java or .jsp (or whatever) file types with IDEA in Windows?

IDEA 2.5.2 is the currently available released version. IDEA 2.6 will support JDK 1.4 as a target development JDK (IDEA still requires JDK 1.3 to run). Early Access of IDEA 3.0 is available at h...more

Yes, unlike other types of Lucene queries, Wildcard, Prefix, and Fuzzy queries are case sensitive. That is because those types of queries are not passed through the Analyzer, which is the compone...more

The components responsible for this are various Analyzers. The demos included in Lucene distribution use StopAnalyzer, which filters out non-alphabetic characters. To include non-alphabetic chara...more

To <exec> a shell command on Windows, you must execute the command shell followed by the command you want. For example: <exec executable="cmd"> <arg line="/c dir"/> </exec...more

Use 'ant -Dname=val'. Refer to it within the build file as ${name}.