@@ -0,0 +1,238 @@
+package zero.zd.zquestionnaire;%0A%0Apublic class QnaState %7B%0A    private static final QnaState qnaStateInstance = new QnaState();%0A%0A    public static QnaState getInstance() %7B%0A        return qnaStateInstance;%0A    %7D%0A%0A    private QnaState() %7B%7D%0A%7D%0A

Add Singleton Class