Json array with null values

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http://stackoverflow.com – i have a trouble with Json array, and I really hope there is someone can help me. Lets say I have a class with json data and iam sending "intent putextra" to another activity. how i can change the value of null before i send it to another activity? i did few prints to discover the null values and they are different, example : Monday : null Tuesday : 08:30 - 18:00 Wednesday : 09:00 - 17:00 **and so on.** The problem is that --> I have all json data and I parsing them into objects, but I would like to before "intent.putextra" and send them to another activity finds null and replace th (HowTos)