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For copy files:
java.lang.NullPointerException
at File3.TestFile.main(BasicFile.java:222)

For write output

For get path information:
java.lang.NullPointerException
at...

I'm writing a program that vaguely imitates a file system in java and I'm having trouble with my methods and my test class

So this is my main class.

I wrote code to:
1)Open a File
2) Copy a...