No Such Name Error. Check Whether Id Is Valid
Management Converged Platforms Data Protection Infrastructure Management Platform Solutions Security Storage Dell Products for Work Network Servers Education Partners Programs Highlighted Communities Support » Connect » Developers » Partners » w3schools Downloads » 日本語コミュニティ EMC Community Dell Community A AppSync Application Xtender bootstrap Atmos Avamar C Captiva Celerra Centera CLARiiON Cloud Tiering Appliance Connectrix D Data Domain Data Protection Advisor Disk Library DiskXtender Documentum E ECS eRoom G Greenplum H Host Systems I InfoArchive Isilon ISIS Document Imaging L Leap N NetWorker P PowerPath Prosphere R RecoverPoint Replication RSA S ScaleIO Secure Remote Smarts SourceOne & EmailXtender EMC Storage Analytics Symmetrix U Unity V ViPR Controller Product Communities > NetWorker > Discussions Please enter a title. You can not post a blank message. Please type your message and try again. 5 Replies Latest reply: Nov 7, 2012 12:24 PM by Ahmed Bahaa Name
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to check if a json key exists? https://community.emc.com/thread/80622?start=0&tstart=0 up vote 39 down vote favorite 6 So i get some json values from the server but i dont know if there will be a particular field or not. So like: {"regatta_name":"ProbaRegatta", "country":"Congo", "status":"invited"} And sometimes, there will be an extra field like: {"regatta_name":"ProbaRegatta", "country":"Congo", "status":"invited", "club":"somevalue"} So i would like to check in code if is there the field named "club" so at parsing i wont get http://stackoverflow.com/questions/17487205/how-to-check-if-a-json-key-exists org.json.JSONException: No value for club java android json share|improve this question edited Sep 16 '15 at 19:25 Zapnologica 5,1222267125 asked Jul 5 '13 at 10:54 Adam Varhegyi 3,9041864128 if(jsonObject.getString("club")!=null){ //get the vale here } –Software Sainath Jul 5 '13 at 10:55 No, at the exception handling the code stops, and further parse actions wont run. –Adam Varhegyi Jul 5 '13 at 10:56 @SoftwareSainath Thats not works, still got the exception. –Adam Varhegyi Jul 5 '13 at 10:57 String clubvalue="";try(clubvalue=jsonobject.getString("club");}catch(Exception e){ } –Software Sainath Jul 5 '13 at 10:59 add a comment| 6 Answers 6 active oldest votes up vote 82 down vote accepted JSONObject class has a method named "has": http://developer.android.com/reference/org/json/JSONObject.html#has(java.lang.String) Returns true if this object has a mapping for name. The mapping may be NULL. share|improve this answer answered Jul 5 '13 at 10:57 PX Developer 2,66732255 1 because "contains" is too corny? :) –Omri374 Apr 5 at 19:03 add a comment| up vote 41 down vote You can check this way where 'HAS' - Returns true if this object has a mapping for name. The mapping may be NULL. if (json.has("status")) { String status = json.getString("status")); } if (json.
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow http://ux.stackexchange.com/questions/13516/how-to-tell-the-user-his-login-credentials-are-incorrect the company Business Learn more about hiring developers or posting ads with us User Experience Questions Tags Users Badges Unanswered Ask Question _ User Experience Stack Exchange is a question and answer site for user experience researchers and experts. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top no such How to tell the user his login credentials are incorrect? up vote 35 down vote favorite 9 When a user has entered incorrect details into a login form, is it better to tell them: The username or password you have entered is invalid. or The user name you have entered is invalid (for invalid usernames) The password you have entered is invalid (for valid usernames but invalid passwords). The first approach "might" no such name be more secure, as the an attacker would not be able to confirm whether the username/email address is valid. At the same time, the user might get frustrated by not being able to remember the email address or username he signed up with. The second apporach is clearly more user friendly, but an attacker would be able to work out what a valid username/email is, and then launch an attack on guessing the password. Some examples: Amazon: There was an error with your E-Mail/Password combination. Please try again. Hotmail: That Windows Live ID doesn't exist. Enter a different ID or get a new one. and That password is incorrect. Try again. Which way should I go about displaying those errors? copywriting conventions security authentication errors share|improve this question edited Apr 27 '13 at 2:55 JohnGB♦ 57.7k19154265 asked Nov 4 '11 at 0:42 F21 3,12311843 5 How important is security for your site. The best approach for Paypal could be different from your personal blog comments. –Emil Nov 4 '11 at 2:28 3 Yep, this is a security thing. Best UX is to tell them the exact problem, you'll have to decide if the "ease" of attacking is a significant great v how easy you want the site to be to access. –Be