Java return null double

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In java double is a primitive type which can not be null, There is Double wrapper class in java which can be checked as null. Declare your coords of type Double not double and check if Double value is null.

I recommend you give a try to GSON , very simple and will handle most of the parsing work for you. You can instead use the hasKey method of Json to check if the item you're parsing contains the value.

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Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How can I return null in Java when the method is defined as int data type? Ask Question. Asked 3 days ago. Active 3 days ago. Viewed 28 times. Rhitam Chaudhury Rhitam Chaudhury 32 4 4 bronze badges. How can I return null in Java when the method is defined as int : you can't — fantaghirocco.

Add a comment. Active Oldest Votes. Here are some alternatives to consider: If you are using Java 8 or later, and are able to change the return type of the method you could use the OptionalInt type to represent an int value that may or may not be present.

In that case, you would return OptionalInt. Collectives on Stack Overflow. Learn more. Returning null in a method whose signature says return int? Ask Question. Asked 8 years, 6 months ago. Active 1 year, 5 months ago. Viewed k times. Because null is not an int? Afaik only void functions can return null, otherwise you need 0 or -1 returned. Russel, that would depend on the language, and in any case, please post answers as answers so we can vote in whatever direction we want.

As a workaround, you could define a contract by which you return Integer. Add a comment. Active Oldest Votes. Nathan Hughes Nathan Hughes 89k 19 19 gold badges silver badges bronze badges. Here I need to check null pointer. Above statement I am checking for null, if true assigning sentinel value -1d to double dbl else ParentBean. Assigning sentinel value is not right approach but.

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Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How to Check null for double type of value in java Ask Question. Asked 4 years, 11 months ago.