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bgColor	#ffcccc

String filename = /* provided by user */;
Path path = new File(filename).toPath();
try {
  BasicFileAttributes attr = Files.readAttributes(
      path, BasicFileAttributes.class, LinkOption.NOFOLLOW_LINKS);
  Object fileKey = attr.fileKey();

  // Check
  if (!attr.isRegularFile()) {
    System.out.println("Not a regular file");
    return;
  }
  // other necessary checks

  // Use
  try (InputStream in = Files.newInputStream(path)) {

    // Check
    BasicFileAttributes attr2 = Files.readAttributes(
        path, BasicFileAttributes.class, LinkOption.NOFOLLOW_LINKS
    );
    Object fileKey2 = attr2.fileKey();
    if (fileKey != fileKey2!fileKey.equals(fileKey2)) {
      System.out.println("File has been tampered with");
    }

    // read file
  };
} catch (IOException x) {
  // handle error
}

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<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="09dc3677caef0f44-f3ec45be-425e46be-ae71a960-67fd1ae786ef9626a759856c"><ac:plain-text-body><![CDATA[	[[API 2006	AA. References#API 06]]	Class `File`, methods `createTempFile`, `delete`, `deleteOnExit`	]]></ac:plain-text-body></ac:structured-macro>
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="f87211f371a80be7-8e13af8d-45eb426c-ade49346-81f1739ac7354e5c3498761f"><ac:plain-text-body><![CDATA[	[[Darwin 2004	AA. References#Darwin 04]]	11.5, Creating a Transient File	]]></ac:plain-text-body></ac:structured-macro>
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="e69c24ef5b6fd583-01ac0631-4e384cb8-b04a89aa-0a65c1d319590d6ec5583da8"><ac:plain-text-body><![CDATA[	[[Garfinkel 1996	AA. References#Garfinkel 96]]	Section 5.6, Device Files	]]></ac:plain-text-body></ac:structured-macro>
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="51dadce1d95e5a43-6a147ec8-4f7e4647-ad81a98d-a0a6b384eecddd155e146921"><ac:plain-text-body><![CDATA[	[[Howard 2002	AA. References#Howard 02]]	Chapter 11, Canonical Representation Issues	]]></ac:plain-text-body></ac:structured-macro>
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="303b6ee751e97ffa-209a1be3-42414510-994aa8ed-32ba545bf9b2e6c068e1f38a"><ac:plain-text-body><![CDATA[	[[J2SE 2011	AA. References#J2SE 11]]	The try-with-resources Statement	]]></ac:plain-text-body></ac:structured-macro>
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="04e2c7a297204630-88e15f78-43364e66-bce9ae8e-9776b43ff1b69c91a2ffe3af"><ac:plain-text-body><![CDATA[	[[Open Group 2004	AA. References#Open Group 04]]	[`open()`	http://www.opengroup.org/onlinepubs/009695399/functions/open.html]	]]></ac:plain-text-body></ac:structured-macro>
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="767a38ca96bf2fae-21e61ae0-441f4ee8-9b40a101-2fafe00b1f039729d02b9fc2"><ac:plain-text-body><![CDATA[	[[SDN 2008	AA. References#SDN 08]]	Bug IDs 4171239, 4405521, 4635827, 4631820	]]></ac:plain-text-body></ac:structured-macro>
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="a3d01b0a5329ff50-9486bea0-4aa64a28-83338f3f-881e9b6d7a817b23b9395d54"><ac:plain-text-body><![CDATA[	[[Secunia 2008	AA. References#Secunia 08]]	[Secunia Advisory 20132	http://secunia.com/advisories/20132/]	]]></ac:plain-text-body></ac:structured-macro>

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