Apr 06, 2018 3:15:29 PM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet dispatcher threw exception java.lang.NullPointerException
Here is my code:
I am getting nullPointerException at second yellow line.
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Preciso Sensedge
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3where is the initialization for `encryptPassword`? – Federico klez Culloca Apr 06 '18 at 09:50
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3Couple of notes here, you'll get a better response if you paste the code in (don't screenshot) and if you include the full stack trace. – Evan Knowles Apr 06 '18 at 09:50
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Actually i made an object encryptPassword (globally) for EncryptPassword class which has method decrypt() in it. – Preciso Sensedge Apr 06 '18 at 09:54
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@PrecisoSensedge It seems you don't understand the nature of NPE. The left-hand side can't cause this exception. Please, read https://stackoverflow.com/questions/218384/what-is-a-nullpointerexception-and-how-do-i-fix-it – Andrew Tobilko Apr 06 '18 at 09:56
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@PrecisoSensedge, the variable can be not initialised and everything is going to be OK if neither `encryptPassword` nor `dbEncryptedPassword` is `null` – Andrew Tobilko Apr 06 '18 at 09:59
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Please don't paste screenshots when it is possible to paste text – Nikolai Shevchenko Apr 06 '18 at 11:07
1 Answers
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Firstly, you have not initialised the encryptPassword variable so it is null by default, causing encryptPassword.decrypt to throw an exception.
Another possible cause is that properties.getProperty("database.password") is returning null, which you're then passing into encryptPassword.decrypt which expects a non-null argument.
mgthomas99
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