The following specification
https://docs.oracle.com/en/java/javase/16/docs/api/java.compiler/javax/tools/StandardJavaFileManager.html#getJavaFileObjects(java.nio.file.Path...)
asserts:

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NullPointerException - if the given array contains null elements
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However for OpenJDK implementation the following code produces no NPEs

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        var stJFM = new StandardJavaFileManager() {
            @Override public int isSupportedOption(String option) { return 0; }
            @Override public ClassLoader getClassLoader(Location location) { return null; }
            @Override public Iterable<JavaFileObject> list(Location location, String packageName, Set<JavaFileObject.Kind> kinds, boolean recurse) throws IOException { return null; }
            @Override public String inferBinaryName(Location location, JavaFileObject file) { return null; }
            @Override public boolean isSameFile(FileObject a, FileObject b) { return false; }
            @Override public boolean handleOption(String current, Iterator<String> remaining) { return false; }
            @Override public boolean hasLocation(Location location) { return false; }
            @Override public JavaFileObject getJavaFileForInput(Location location, String className, JavaFileObject.Kind kind) throws IOException { return null; }
            @Override public JavaFileObject getJavaFileForOutput(Location location, String className, JavaFileObject.Kind kind, FileObject sibling) throws IOException { return null; }
            @Override public FileObject getFileForInput(Location location, String packageName, String relativeName) throws IOException { return null; }
            @Override public FileObject getFileForOutput(Location location, String packageName, String relativeName, FileObject sibling) throws IOException { return null; }
            @Override public void flush() throws IOException { }
            @Override public void close() throws IOException { }
            @Override public Iterable<? extends JavaFileObject> getJavaFileObjectsFromFiles(Iterable<? extends File> files) { return null; }
            @Override public Iterable<? extends JavaFileObject> getJavaFileObjects(File... files) { return null; }
            @Override public Iterable<? extends JavaFileObject> getJavaFileObjectsFromStrings(Iterable<String> names) { return null; }
            @Override public Iterable<? extends JavaFileObject> getJavaFileObjects(String... names) { return null; }
            @Override public void setLocation(Location location, Iterable<? extends File> files) throws IOException { }
            @Override public Iterable<? extends File> getLocation(Location location) { return null; }
        };
        stJFM.getJavaFileObjects((Path)null);
        stJFM.getJavaFileObjects((Path)null, (Path)null);
        stJFM.getJavaFileObjects(Path.of("a"), (Path)null);
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While the following call would generate an NPE:

        stJFM.getJavaFileObjects((Path[])null);