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Introduction

Proposed Algorithm

Experimental Results (Screen Shots) Future Work

Conclusion

References

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The main need of document comparison software isplagiarism detection.

Plagiarism is the process of lifting instances of some elseswork .

And plagiarism detection is the process of locating theseinstances of plagiarism within a work or document.

The basic objective is to compare two documents forcontent similarity, and to display the percentage similarity ofthese documents.

A document comparison and identification methodcomprises the steps of: identifying ,in a source document, a

sentence or words; and finding its match.

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The matched line number and its corresponding file name isstored for further reference. Finally for user convenience theeither the match percent is displayed or the highlighting featurecan be used where the matched content of each file is highlighted.

Our software would provide a basic comparison facility whereyour can compare text of one document (Sentence by sentence)with another document/s present in the directory.

The sentence numbers of the matched sentences are stored intxt files for later reference.

At the end the percentage will be displayed, which would be thematch percent per file.

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Primary checking: (checks basic requirements for projectto run)

STEP 1: Start

ST

EP 2: Accept the user file to be compared from the user.STEP 3: If the file does not exists, display error message and go to

setp1 (i.e.-prompt the user to enter his choice again) else goto setp4

STEP 4: Check if the file specified is in text format, if not displayerror message and go to step 2 else go to step 5.

STEP 5: Check if the directory bck dir i.e. base directory ispresent. If not, display error message, create the basedirectory and go to setp2 else go to step 6.

STEP 6: Check if the base directory is empty. If yes display theerror message and go to further mechanism else go to step2.

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Start

Accept the user file to be compared from the user

Does thefile exists?

Display the error message

Is the file intext format?

No

Yes

No

Yes

Does bck direxists?

Display the error messageand create the bck dir

Is bck dirempty?

Yes

Yes

No

No

Continue with the checking mechanism

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Checking mechanism:Take user file sentence

Does base fileSentence exist

Take base file sentence

Match found?

Write the matched line number into thecorresponding txt files created.

Does base fileexist

No

Yes

No

Next file

Yes

No

Yes

Generate Output

Goto nextsentence

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End

Start

Sentence retrieval:

Input: sentence number, text file

Output: desired sentence (in form of String Buffer)

Read character from file

Count++Is

Count>Sent.No.

no

No

no

Append character tostring buffer

Return String buffer

Is character.

Iscount=sent no.?

Yes

Yes Yes

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InputScreen:

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Browse

Screen:

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Output Screen:

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Future works include some following features: Word to word or letter to letter comparisons. See to the letter what

changed in a sentence.

Compares text from any application by cutting and pasting into 'DiffDoc'.

Comma and other punctuation marks may be ignored and comparison maybe made available.

Compare files of any type against any file type (i.e. Compare PDF to aWord document).

Compare documents of MS Word (DOC, DOCX etc), Excel, PDF, RichT

ext (RT

F),T

ext, HT

ML, XML, PowerPoint, or WordPerfect and retainformatting.

Choose any portion of any document (file) and compare it againstany portion of the same or different document (file).

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WHILE SHOWING THE OUTPUT:

Several popular comparison systems include the capability tocolor-code changed regions in files.

To show a side-by-side comparison of two files, graphicallyconnecting matching sections.

Other methods use a thumbnail view of a program, with line-by-

line coloring to indicate the match

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Thus by using line by line comparison method to comparetwo/more documents, we overcome the drawbacks of the present

method and provide the user with a user- friendly and moreaccurate comparison method.

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http://java.sun.com/j2se/1.4.2/docs/api/

http://java.sun.com/docs/books/tutorial/uiswing/components/filechooser.html

http://java.sun.com/javase/6/docs/api/javax/swing/GroupLayout.html

http://www.java2s.com/Tutorial/Java/0240__Swing/CreatingaJOptionPane.htm

http://msdn.microsoft.com/enus/library/aa988225(VS.80).aspx

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