### Question:
FileConverterFactory implements TypeConverterFactory<String, File> { @Override public TypeConverter<String, File> createTypeConverter() { return value -> { try { return new File(value); } catch (Exception e) { throw new TypeConverterException("Unable to decode '" + value + "' as a " + File.class.getName() + " instance.", e); } }; }  @Override TypeConverter<String, File> createTypeConverter(); @Override TypeConverterDescriptor<Class<String>, Class<File>> getTypeConverterDescriptor();  }### Answer:
@Test public void test() { FileConverterFactory fileConverterFactory = new FileConverterFactory(); assertEquals(new File("/a.txt"), fileConverterFactory.createTypeConverter().convert("/a.txt")); }