Java FileSystems.newFileSystem Method

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Three new methods have been added to java.nio.file.FileSystems

newFileSystem(Path)
newFileSystem(Path, Map<String, ?>)
newFileSystem(Path, Map<String, ?>, ClassLoader)

newFileSystem(Path, Map<String, ?>) creates a source (but not binary) compatibility issue for code that has been using the existing 2-arg newFileSystem(Path, ClassLoader) and specifying the class loader as null. For example, the following cannot be compiled because the reference to newFileSystem is ambiguous:

FileSystem fs = FileSystems.newFileSystem(path, null);

To avoid the ambiguous reference, this code needs to be modified to cast the second parameter to java.lang.ClassLoader.

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