java - @NonNull triggers warning in Eclispse although constant value used -


i have got following method definition:

public static @nullable string getfile(@nonnull final path path, @nonnull final charset charset)

and invoking method somewhere else following statement:

final string filestring = fileutil.getfile(filepath, standardcharsets.utf_8);

however, i'm using import org.eclipse.jdt.annotation.nonnull annotation eclipse triggers warning:

eclipse warning

why warning triggered although i'm using constant (i.e. standardcharsets.utf8)?

the declaration standardcharsets.utf_8 is:

public static final charset utf_8 = charset.forname("utf-8");

as far eclipse null analysis concerned possible charset.forname might return null @notnull can't guaranteed.


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