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copied!<h1>Unix</h1> <p>Use the <code>jar</code> (or <code>unzip -v</code>), <code>grep</code>, and <code>find</code> commands.</p> <p>For example, the following will list all the class files that match a given name:</p> <pre><code>for i in *.jar; do jar -tvf "$i" | grep -Hsi ClassName && echo "$i"; done </code></pre> <p>If you know the entire list of Java archives you want to search, you could place them all in the same directory using (symbolic) links.</p> <p>Or use <code>find</code> (case sensitively) to find the JAR file that contains a given class name:</p> <pre><code>find path/to/libs -name '*.jar' -exec grep -Hls ClassName {} \; </code></pre> <p>For example, to find the name of the archive containing <code>IdentityHashingStrategy</code>:</p> <pre><code>$ find . -name "*.jar" -exec grep -Hsli IdentityHashingStrategy {} \; ./trove-3.0.3.jar </code></pre> <p>If the JAR could be <em>anywhere</em> in the system and the <a href="http://www.linfo.org/locate.html" rel="noreferrer"><code>locate</code></a> command is available:</p> <pre><code>for i in $(locate "*.jar"); do echo $i; jar -tvf $i | grep -Hsi ClassName; done </code></pre> <h1>Windows</h1> <p>Open a <a href="https://conemu.github.io/" rel="noreferrer">command prompt</a>, change to the directory (or ancestor directory) containing the JAR files, then:</p> <pre><code>for /R %G in (*.jar) do @jar -tvf "%G" | find "ClassName" > NUL && echo %G </code></pre> <p>Here's how it works:</p> <ol> <li><code>for /R %G in (*.jar) do</code> - loop over all JAR files, recursively traversing directories; store the file name in %G.</li> <li><code>@jar -tvf "%G" |</code> - run the Java Archive command to list all file names within the given archive, and write the results to standard output; the <code>@</code> symbol suppresses printing the command's invocation.</li> <li><code>find "ClassName" > NUL</code> - search standard input, piped from the output of the jar command, for the given class name; this will set <code>ERRORLEVEL</code> to 1 iff there's a match (otherwise 0).</li> <li><code>&& echo %G</code> - iff <code>ERRORLEVEL</code> is non-zero, write the Java archive file name to standard output (the console).</li> </ol> <h1>Web</h1> <p>Use a <a href="https://www.google.ca/search?q=JAR+search+engine" rel="noreferrer">search engine</a> that scans <a href="http://www.findjar.com/" rel="noreferrer">JAR files</a>.</p>

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