Java Map Null Pointer Exception
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Java Map Null Pointer Exception
I am implementing an app which uses gps location data , with a mapfragment integration. Nullpointerexception when accessing index value of null array. Pi java mapping nullpointerexception 517 views follow hi gurus, i'm having some troubles doing the mapping through java mapping in pi.
} string convert (string s) { In java, a special null value can be assigned to an object reference. As far as java see no difference between null and real object it leads to impossible operations like the next one below:
In the given example, string s has been declared but not initialized.
If this is not done, and the map is null, then a nullpointerexception is thrown. The null pointer exception is one of the several exceptions supported by the java language. You can keep serializestringtomap as it is but you need to change the test, because it makes no sense anymore. If mymap doesn't contain a key that matches c, then mymap.get (c) will return null.
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