Java错误或windows错误与文件创建时间

删除并重新创建文件时，创建时间：始终与第一次创建文件时相同

Path path = Paths.get(file);
BasicFileAttributes attr = Files.readAttributes(path , BasicFileAttributes.class);
System.out.println("Creation time: " + attr.creationTime())

添加完整的源代码：

public class FileCreationTimeTest {

    @Test
    public void testFileTimeCreation() throws Exception {
        for(int i = 0; i < 10; i++) {
            FileTime fileTime = getFileCreationTime();
            System.out.println(fileTime);
            Thread.sleep(1000);
            FileTime fileTime2 = getFileCreationTime();
            System.out.println(fileTime2);
            Assert.assertEquals(fileTime.compareTo(fileTime2), 0);
        }
    }

    private FileTime getFileCreationTime() throws Exception {
        File file = new File("test.txt");
        file.createNewFile();
        Path path = Paths.get(file.getAbsolutePath());
        BasicFileAttributes attr = Files.readAttributes(path , BasicFileAttributes.class);
        FileTime fileTime = attr.creationTime();
        file.delete();
        return fileTime;
    }
 }

环境：Windows 7、JRE 1.8.0_25

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这是错误吗？

磁盘上的文件系统是什么？请提供文件删除和重新创建的完整代码