public class JavadocTest {

    /**
     * Test.
     *
     * @param s one
     * @param s two
     * @param s three
     *
     *
     * @return result-one
     * @return result-two
     * @return result-three
     */
    public static int Test(String s) { return s.length(); }

    /**
     * Main.
     *
     * @param args param-one
     * @param args param-two
     * @param args param-three
     */
    public static void main(String[] args) {

        System.out.println(Test("test"));
    }
}


Output (html):

public static int Test(java.lang.String s)

Test.

Parameters:
    s - one
    s - two
    s - three
Returns:
    result-one

public static void main(java.lang.String[] args)

Main.

Parameters:
    args - param-one
    args - param-two
    args - param-three


No warnings/errors were reported while running javadoc - is that behavior expected?

JDK9 b66 was used.