Consider this example:

/**
 * @param <T> documentation for T
 */
public class Test<T> {
    /**
     * @param <S> documentation for S
     * @param clazz documentation for clazz
     */
    public <S extends T> Test(Class<S> clazz) {}

    /**
     * @param <S> documentation for S
     * @param clazz documentation for clazz
     */
    public static <S extends Number> Test<S> newInstance(Class<S> clazz) {}
}

The type parameter on the constructor isn't documented by the standard doclet
as the it is for the generic method newInstance:

Constructor Summary
Test(java.lang.Class<S> clazz)

Method Summary
static <S extends java.lang.Number> Test<S> newInstance(java.lang.Class<S> clazz)