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    <p>Replacing tokens in Java code is working for me. I use something like this, prior to the compile task:</p> <pre><code>&lt;copy todir="${target.dir}/java" filtering="false"&gt; &lt;fileset dir="${src.dir}/java"/&gt; &lt;/copy&gt; &lt;replace dir="${target.dir}/java" value="DEMO_MODE = ${demo.mode}"&gt; &lt;replacetoken&gt;DEMO_MODE = true&lt;/replacetoken&gt; &lt;/replace&gt; </code></pre> <p>First I copy Java files into a temporary location, then I replace tokens. Javac these copied files. ${demo.mode} can be given as a parameter even in command line or property file. DEMO_MODE is a public static final boolean variable in a class.</p> <p>Two more things which can be useful for you:</p> <p>You can set up conditinal property assignments in targets:</p> <pre><code>&lt;condition property="distribution.postfix" value="-demo" else=""&gt; &lt;equals arg1="${demo.mode}" arg2="true" /&gt; &lt;/condition&gt; </code></pre> <p>And you can use <strong>if</strong> and <strong>unless</strong> conditions for targets:</p> <pre><code>&lt;target name="demotarget" depends="jar" if="demo.mode"&gt; ... &lt;/target&gt; </code></pre> <p>Actually, I would prefer modularization and different targets for PRO and DEMO releases, maybe switchable functions, but we use this tricks for something else, particularly Development vs. Production releases: Development code contains more debug logging which we don't want to be visible in production software with a logLevel=DEBUG config. Furthermore, production code obfuscated, development isn't, thus the latter throws readable stack traces for example.</p>
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    1. POjava ant build several editions of software
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    1. COHello! "DEMO_MODE is a public static final boolean variable in a class" <<< in which class? Where is that specified?
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    2. COIn 'App' class, which contains some other constants. It's accessible from the whole application.
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    3. COwhere is this 'App' class at? What's the "qualified" name? I can't find it..
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