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copied!<p>That's because <code>*</code> is a shell wildcard: it has a special meaning to the shell, which expands it before passing it on to the command (in this case, <code>java</code>).</p> <p>Since you need a literal <code>*</code>, you need to escape it from the shell. The exact way of escaping varies depending on your shell, but you can try:</p> <pre><code>java ProgramName 5 3 "*" </code></pre> <p>Or:</p> <pre><code>java ProgramName 5 3 \* </code></pre> <hr> <p>By the way, if you want to know what the shell does with the <code>*</code>, try printing the content of <code>String[] args</code> to your <code>main</code> method. You'll find that it will contain names of the files in your directory.</p> <p>This can be handy if you need to pass some filenames as command line arguments.</p> <h3>See also</h3> <ul> <li><p><a href="http://en.wikipedia.org/wiki/Glob_%28programming%29" rel="noreferrer">Wikipedia: glob</a></p> <blockquote> <p>For example, if a directory contains two files, <code>a.log</code> and <code>b.log</code> then the command <code>cat *.log</code> will be expanded by the shell to <code>cat a.log b.log</code></p> </blockquote></li> <li><p><a href="http://en.wikipedia.org/wiki/Escape_character" rel="noreferrer">Wikipedia: Escape character</a></p> <blockquote> <p>In Bourne shell (<code>sh</code>), the asterisk (<code>*</code>) and question mark (<code>?</code>) characters are wildcard characters expanded via globbing. Without a preceding escape character, an <code>*</code> will expand to the names of all files in the working directory that don't start with a period if and only if there are such files, otherwise <code>*</code> remains unexpanded. So to refer to a file literally called <code>"*"</code>, the shell must be told not to interpret it in this way, by preceding it with a backslash (<code>\</code>).</p> </blockquote></li> </ul>

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