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copied!<p>One thing you could do is to run a separate program using <a href="http://download.oracle.com/javase/6/docs/api/java/lang/Runtime.html" rel="nofollow">Runtime</a> to start a <a href="http://download.oracle.com/javase/6/docs/api/java/lang/Process.html" rel="nofollow">Process</a> consisting of your fortran code. The following is an example of this:</p> <pre><code>Runtime rt = Runtime.getRuntime(); try { String[] env = {"/path/to/program"}; Process proc = rt.exec("your_program", env); System.out.println("return value: " + proc.waitFor()); } catch (Exception ex) { System.err.println(ex); } </code></pre> <p>The above code will execute /path/to/program/your_program and wait for it to finish and then read off the return code.</p> <p>Alternatively, you could write some information to <em>stdout</em> and read that from your java program:</p> <pre><code>import java.io.*; ... Runtime rt = Runtime.getRuntime(); try { String[] env = {"/path/to/program"}; Process proc = rt.exec("your_program", env); System.out.println("return value: " + proc.waitFor()); InputStream stream = proc.getInputStream(); BufferedReader reader = new BufferedReader(new InputStreamReader(stream)); while (reader.ready()) { // Do something with the data here. System.out.println(reader.readLine()); } } catch (Exception ex) { System.err.println(ex); } </code></pre> <p>If you need to supply the external program with arguments you pass them as an array of strings. As an example, if I wanted to run <code>ls -lh /etc/</code> that is what the following code does:</p> <pre><code> String[] cmd = {"ls", "-lh", "/etc/"}; String[] env = {"/bin/"}; Process proc = rt.exec(cmd, env); </code></pre> <p>You could also try using <a href="http://en.wikipedia.org/wiki/Java_Native_Interface" rel="nofollow">Java Native Interface</a> to communicate with C/C++ code which can interface with fortran.</p>

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