只有在/** */中的注釋才能生成文檔.
/**
 * Description of the class, method, attribute.
 *
 * @author
 * @version
 * @param
 * @return void function can not use this tag.
 * @exception
 * @deprecated
 * @see
 * @since JDK6.0
 */

/**
 * Print the passed value to the screen.
 *
 * @param value is to printed
 * @return if value > 0, return true, otherwise return false
 */
public boolean print(int value) {
    System.out.println(value);
    return value > 0 ? true : false;
}