Singleton.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.

                ListCommand = new HashMap<>();
                Class cla;

                File dir = new File(web_location + "/WEB-INF/classes/ws/pages");
                String[] files = dir.list();
                for (String file : files) {
                    String[] ss = file.split("\\.");
                    cla =  Class.forName("ws.pages." + ss[0]);

                    Object obj = cla.newInstance();   //  newInstance() -  deprecated
                   
                    Method[] methods = cla.getMethods();
                    for (Method method : methods) {
                        if (COMMAND.matcher(method.getName()).find()) {
                            ListCommand.put(method.getName(), obj);
                        }
                    }
                }

javac: option -Xbootclasspath/p: not allowed with target 1.10

<!--        <path id="endorsed.classpath.path" path="${endorsed.classpath}"/>
         <condition else="" property="endorsed.classpath.cmd.line.arg" value="-Xbootclasspath/p:'${toString:endorsed.classpath.path}'">
            <and>
                <isset property="endorsed.classpath"/>
                <length length="0" string="${endorsed.classpath}" when="greater"/>
            </and>
        </condition>-->

<!--<compilerarg line="${endorsed.classpath.cmd.line.arg}"/>-->