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[Dijkstra Algorithm]

Hello everybody, I am trying to develop my dijkstra algorithm and I'm having trouble because in line 132/133 it shows me the following error: enter image description here

Can someone help me solve this question, thanks!!

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João Rodrigues
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    Please don't use images in your question. Put the code and error messages into your question as text. – tgdavies Oct 19 '21 at 21:27
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    And see https://stackoverflow.com/questions/218384/what-is-a-nullpointerexception-and-how-do-i-fix-it/218510#218510 – tgdavies Oct 19 '21 at 21:28

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