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Java Java Data Structures Efficiency! Custom Serialization

Louis Sankey
Louis Sankey
22,595 Points

In Intellij getting cannot resolve constructor 'FileInputStream(java.io.FileInputStream)'

Hi, I've been trying to work through this tutorial in Intellij. It's going great so far except now I am getting the 'cannot resolve constructor error'. I am wondering what this could be from. If anyone has an idea, pls lmk.

Could you post some code?