Determine if two files store the same content

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Exactly what FileUtils.contentEquals method of Apache commons IO does and api is here.

Try something like:

File file1 = new File("file1.txt");
File file2 = new File("file2.txt");
boolean isTwoEqual = FileUtils.contentEquals(file1, file2);

It does the following checks before actually doing the comparison:

  • existence of both the files
  • Both file’s that are passed are to be of file type and not directory.
  • length in bytes should not be the same.
  • Both are different files and not one and the same.
  • Then compare the contents.

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