@@ -0,0 +1,353 @@
+/**%0A * Created by mazhuang on 2016/9/15.%0A */%0Apublic class GeneralTest %7B%0A    public static void main(String%5B%5D args) %7B%0A        instanceofTest();%0A    %7D%0A%0A    public static void instanceofTest() %7B%0A        // null installof class won't crash%0A        boolean is = (null instanceof String);%0A        System.out.println(%22null installof String is %22 + is);%0A    %7D%0A%7D%0A

Add GeneralTest class