How to compare two files char by char

Hi,
I want to compare two files and after Comparison i want all the differences in the new file has to be updated to old file (Without deleteing the contents of the file)?
Any help will be appriciated.
Thanks.

I think i have to elaborate my question�.. for
example take a file called xyz.xml which contain some
data which I don�t want to get deleted� after some
days this file has been modified (i.e. some more data
has been added) . Now without overwriting the file
/deleting the earlier contents of file xyz.xml. How
do I update xyz.xml file?
Now I think iam clear.
Thanks.This does not make sense at all! Either your file has been changed or it has not. If it has been changed then there is nothing to do. If it has not been changed then there is nothing to do.

Similar Messages

How to compare two files in java & uncommon text should print in text file.

Hi,
Can any one help me to write Core java program for this.
How to compare two files in java & uncommon text should print in other text file.
thanks
Sam

Hi All,
i m comparing two HTML file.. thats why i am getting problem..
import java.io.BufferedReader;
import java.io.FileReader;
public class textmatch{
public static void main(String[] argv)
throws Exception{
BufferedReader fh =new BufferedReader(new FileReader("internal.html"),1024);
BufferedReader sh = new BufferedReader(new FileReader("external.html"),1024);
String s;
String y;
while ((s=fh.readLine())!=null)
if ( s.equals(y=sh.readLine()) ){
System.out.println(s + " " + y); //REMOVE THIS PRINTLN STATEMENT IF YOU JUST WANT TO SHOW THE SIMILARITIES
sh.close();
fh.close(); }
thanks
Sam

How to compare two files in Java & uncommon text should print in Diff text

Hi All,
can any one help me to write a java program..
How to compare two files in Java & uncommon text should print in Diff text file..
Thanks
Sam

Hi All,
i m comparing two HTML file.. thats why i am getting problem..
import java.io.BufferedReader;
import java.io.FileReader;
public class textmatch{
public static void main(String[] argv)
throws Exception{
BufferedReader fh =new BufferedReader(new FileReader("internal.html"),1024);
BufferedReader sh = new BufferedReader(new FileReader("external.html"),1024);
String s;
String y;
while ((s=fh.readLine())!=null)
if ( s.equals(y=sh.readLine()) ){
System.out.println(s + " " + y); //REMOVE THIS PRINTLN STATEMENT IF YOU JUST WANT TO SHOW THE SIMILARITIES
sh.close();
fh.close(); }
thanks
Sam

How to compare two files using MD5?

Hi,all:
How to compare two files to know if they're the same without any difference?I want to use MD5, but I just konw how get a message digest of a string. How to get a message digest of a file? Or there is other method to compare two files?
Thanks advance!

This is starting to sound rather a lot like a homework problem.
An MD5 message digest is simply a 16 byte array. To compare two message digests...
byte[] md5incoming = ...
byte[] md5comparison = ...
if( md5incoming.equals(md5comparison) ) {
System.out.println("MD5 Checksums match");
}To find out how to generate an MD5 checksum, please look up MessageDigest in the API documentation, and do a google search for "MD5 java"
In a networked scenario, there are two issues - firstly the performance in sending copies of files all over the place (imagine if it's a 10Gb file to be compared over a 14.4K modem link, this would take a while). Secondly, the network link itself might insert an error in the file and you'd get a false miss.
By only sending MD5 digests over the link, you simultaneously reduce the error (shorter files are less likely to be corrupted) and reduce the transmission time (16 bytes takes practically no time to transmit over damp string, let alone any sort of sensible device).
D.

How to compare two files?

Folks:
Is there any utility class or method that I can use to compare the contents of two files? Something like diff comamnd in UNIX.
Thanks a lot!

I wrote the following program and it seems to work. Any suggestion is welcome!
import java.io.*;
public class ContentComparator
* Returns <code>true</code> if both input streams byte contents is identical.
* @param input1
* first input to contents compare
* @param input2
* second input to contents compare
* @return <code>true</code> if content is equal
boolean contentsEqual( InputStream is1, InputStream is2, boolean ignoreWhitespace )
try
if( is1 == is2 )
return true;
if( is1 == null && is2 == null ) // no byte contents
return true;
if( is1 == null || is2 == null ) // only one has
// contents
return false;
while( true )
int c1 = is1.read();
while( ignoreWhitespace && isWhitespace( c1 ) )
c1 = is1.read();
int c2 = is2.read();
while( ignoreWhitespace && isWhitespace( c2 ) )
c2 = is2.read();
if( c1 == -1 && c2 == -1 )
return true;
if( c1 != c2 )
break;
catch( IOException ex )
finally
try
try
if( is1 != null )
is1.close();
finally
if( is2 != null )
is2.close();
catch( IOException e )
// Ignore
return false;
private boolean isWhitespace( int c )
if( c == -1 )
return false;
return Character.isWhitespace( ( char )c );
public static void main( String[] args )
InputStream is1 = null;
InputStream is2 = null;
try
is1 = new FileInputStream( "c:\\file1.txt" );
is2 = new FileInputStream( "c:\\file2.txt" );
catch( FileNotFoundException e )
e.printStackTrace();
ContentComparator cc = new ContentComparator();
boolean ifIgnoreWhiteSpace = true;
boolean ifEqual = cc.contentsEqual( is1, is2, ifIgnoreWhiteSpace );
System.out.println( "Are those two files equal? " + ifEqual );

How to compare two files in SAP

Hi All,
I have downloaded the contents of a custom table in two files and saved in the uncoverted format, now I want to comapre the contents of these files and see if there is any difference in these files or not. So is there any utility in SAP which I can use to compare these two files.
Thanks,
Rajeev

I can think of 3 alternatives -
1. Write a report to upload the data and then compare the internal table.
2. Download data in XLS file and use Excel utilities to compare.
3. Use file compring tools .( Thanks to Thomas - http://en.wikipedia.org/wiki/Comparison_of_file_comparison_tools)

How to compare two file differnces

Hi All ,
I have two files on my presentation server one file will have some errors and another will conatine corrected , Now I have to compare those two files and display the differed recoreds as a list.Please provide me the required code.
Thank you ,
Satheesh.

Somebody has thought of this before...
http://en.wikipedia.org/wiki/Comparison_of_file_comparison_tools
You don't need a new ABAP program for this.
Thomas

How to compare two html files

Hi,
I have two similar css files and want to have a third version with some properties from one and some from other file. But I do not know how to compare two files in DW. Is there some hint or program?
Thanks.
reagrds, Natasa

hans-g. wrote:
It might sound strange, but for this I use a word processing program. I build a table with three columns (in portrait or in landscape mode depending on your needs). I set the paragraph marks so that I can compare the paragraphs. The new combinated version I copy into the third column. And then the way is free to copy the new compounded text into your new DW file.
Hans,
Have you tried WinDiff, WinMerge, Beyond Compare (my choice) or Compare It! or several others which automate much of the manual system outlined above?
http://www.scootersoftware.com/moreinfo.php?zz=screenshot&shot=TextCompare
http://www.scootersoftware.com/moreinfo.php?zz=screenshot&shot=TextMerge
These diff tools can then be used in conjunction with DW.
http://help.adobe.com/en_US/dreamweaver/cs/using/WSc78c5058ca073340dcda9110b1f693f21-7edda .html
Just a thought.

How to open acrobat in java and compare two files using javacode

I am absolutely new to use acrobat software in Java. I want to open two pdf files at a time and then compare the differences between them thru java program .
i am not sure how to do it. iam trying many ways without success.
I used jre and could open open files using runtime method , but couldn't do comaparision. i..e could't access tools menu (alt+t) Compare two files and <enter>. help in java will be appreciated.
Pls guide me the steps to use the acrobat library. At http://partners.adobe.com/asn/acrobat i found supporting vb and vc only.
Any help or links are greatly appreciated.

iText is an open source PDF library, reads a PDF one page at a time. You could check it out. I've used it for writing/splitting/concatenating PDFs, but not comparing files
http://www.lowagie.com/iText/
Scott
http://www.swiftradius.com

How to compare two PDF files through PLSQL

Hi,
Can any body help that how to compare two PDF files through PLSQL programing and gives the differences as output.
Thanks,

Or simply apply an oracle text index on your pdf column:
SQL> create table t (id integer primary key, bl blob)
Table created.
SQL> declare
bf bfile := bfilename('TEMP','b32001.pdf');
bl blob;
begin
dbms_lob.createtemporary(bl,true);
dbms_lob.open(bf,dbms_lob.lob_readonly);
DBMS_LOB.LOADFROMFILE(bl, bf,dbms_lob.getlength(bf));
insert into t values (1,bl);
commit;
dbms_lob.close(bf);
dbms_lob.freetemporary(bl);
end;
PL/SQL procedure successfully completed.
SQL> create index t_idx on t (bl) indextype is ctxsys.context parameters ('filter ctxsys.auto_filter')
Index created.
SQL> declare
   mklob   clob;
begin
   ctx_doc.filter ('t_idx', '1', mklob, true);
   dbms_output.put_line (substr (mklob, 1, 250));
   dbms_lob.freetemporary (mklob);
end;
Oracle® Database
Release Notes
11
g
Release 1 (11.1) for Linux
B32001-04
November 2007
This document contains important information that was not included in the
platform-specific or product-specific documentation
PL/SQL procedure successfully completed.This generates a text only version of your pdf and standard text comparison methods can be applied ....

How to compare two Universes ?

Post Author: Shrikant
CA Forum: Administration
Hi.. all I want to compare two universes of different data mart to check the table structure. Can anybody please tell me how to compare two Universes of different Datamarts?How i can achive this usinig BusinessObjects Enterprise XI Release 2 ??
Thanks in advance.
Shrikant

Create
table tab1(ID
int ,DE char(10))
Create
table tab2(ID
int ,DE char(10))
Insert
into tab1 Values
(1,'aaa')
Insert
into tab1 Values
(2,'bbb')
Insert
into tab1 Values(3,'ccc')
Insert
into tab1 Values(4,'dfe')
Insert
into tab2 Values
(1,'aaa')
Insert
into tab2 Values
(2,'xx')
Insert
into tab2 Values(3,'ccc')
Insert
into tab2 Values(6,'wdr')
SELECT
tab1.ID,tab2.ID
As T2 from tab1
FULL
join tab2 on tab1.ID
= tab2.ID
WHERE
BINARY_CHECKSUM(tab1.ID,tab1.DE)
<> BINARY_CHECKSUM(tab2.ID,tab2.DE)
OR tab1.ID
IS NULL
OR
tab2.ID IS
NULL
ID column considered as a primary Key
Apart from different record,Above query populate missing record in both tables.
Result Set
ID ID
2 2
4 NULL
NULL 6
ganeshk

How to compare two strings whether both are equal while ignoring the difference in special characters (example: & vs & and many others)?

I attempted to compare two strings whether they are equal or not. They should return true if both are equal.
One string is based on Taxonomy's Term (i.e. Term.Name) whereas other string is based on String object.
The problem is that both strings which seem equal return false instead of true. Both string values have different special characters though their special characters are ＆ and &
Snapshot of different design & same symbols:
Is it due to different culture or language?
How to compare two strings whether both are equal while ignoring the difference in special characters (＆ vs &)?

Hi Jerioon,
If you have a list of possible ambiguous characters the job is going to be easy and if (＆ vs &) are the only charracters in concern awesome.
You can use the below solution.
Before comparing pass the variables through a replace function to standarize the char set.
$Var = Replace($Var,"＆","&")
This is going to make sure you don't end up with ambiguous characters failing the comparison and all the char are "&" in this case.
Similar technique is used to ignore Character Cases 'a' vs. 'A'
Regards,
Satyajit
Please “Vote As Helpful”
if you find my contribution useful or “Mark As Answer” if it does answer your question. That will encourage me - and others - to take time out to help you.

How to Compare Two Strng without .equals() method

Hiii,
How to compare two Strings with out .equals method if there are white spaces in between these string it should be avoided..
eg: ab cd ef g is equal to a bc de fg
Please give me the logic or code..
Your help will be appreciated

dude find the code without the equal method
public class test {
     public static void main(String args[])
          String str = "ab cd ef g" ;
          String str1 = "a bc de fg";
          char []ch = str.toCharArray();
          char []ch1 = str1.toCharArray();
          int counter =0, counter1 = 0;
          while(counter < ch.length && counter1 < ch1.length)
               while(ch[counter]==' ')
                    counter++;
               while(ch1[counter1]==' ')
                    counter1++;
               if(ch[counter] != ch1[counter1])
                    break;
               counter++; counter1++;
          if(counter == ch.length && counter1 == ch1.length)
               System.out.println("true");
          else
               System.out.println("false");
}

How to compare two rows from two table with different data

how to compare two rows from two table with different data
e.g.
Table 1
ID   DESC
1     aaa
2     bbb
3     ccc
Table 2
ID   DESC
1     aaa
2     xxx
3     ccc
Result
2

Create
table tab1(ID
int ,DE char(10))
Create
table tab2(ID
int ,DE char(10))
Insert
into tab1 Values
(1,'aaa')
Insert
into tab1 Values
(2,'bbb')
Insert
into tab1 Values(3,'ccc')
Insert
into tab1 Values(4,'dfe')
Insert
into tab2 Values
(1,'aaa')
Insert
into tab2 Values
(2,'xx')
Insert
into tab2 Values(3,'ccc')
Insert
into tab2 Values(6,'wdr')
SELECT
tab1.ID,tab2.ID
As T2 from tab1
FULL
join tab2 on tab1.ID
= tab2.ID
WHERE
BINARY_CHECKSUM(tab1.ID,tab1.DE)
<> BINARY_CHECKSUM(tab2.ID,tab2.DE)
OR tab1.ID
IS NULL
OR
tab2.ID IS
NULL
ID column considered as a primary Key
Apart from different record,Above query populate missing record in both tables.
Result Set
ID ID
2 2
4 NULL
NULL 6
ganeshk

How to compare two rows in PL/SQL?

Hi All,
How to compare two rows in PL/SQL? Is there any method that I can use instead of comparing them column by column?
Any feedback would be highly appreciated.

PhoenixBai wrote:
Hi All,
How to compare two rows in PL/SQL? Is there any method that I can use instead of comparing them column by column?What "rows" are you referring to?
If you're talking of rows within a PL/SQL associative array there are techniques as described in the documentation... e.g.
SQL> ed
Wrote file afiedt.buf
1 declare
2    type v1 is table of number;
3    r1 v1 := v1(1,2,4);
4    r2 v1 := v1(1,2,3);
5 begin
6    if r1 MULTISET EXCEPT DISTINCT r2 = v1() then
7      dbms_output.put_line('Same');
8    else
9      dbms_output.put_line('Different');
10    end if;
11* end;
SQL> /
Different
PL/SQL procedure successfully completed.
SQL> ed
Wrote file afiedt.buf
1 declare
2    type v1 is table of number;
3    r1 v1 := v1(1,2,3);
4    r2 v1 := v1(1,2,3);
5 begin
6    if r1 MULTISET EXCEPT DISTINCT r2 = v1() then
7      dbms_output.put_line('Same');
8    else
9      dbms_output.put_line('Different');
10    end if;
11* end;
SQL> /
Same
PL/SQL procedure successfully completed.
SQL>If you're talking about rows on a table then you can use the MINUS set operator to find the rows that differ between two sets of data...
SQL> select * from emp;
     EMPNO ENAME      JOB              MGR HIREDATE                    SAL       COMM     DEPTNO
      7369 SMITH      CLERK           7902 17-DEC-1980 00:00:00        800                    20
      7499 ALLEN      SALESMAN        7698 20-FEB-1981 00:00:00       1600        300         30
      7521 WARD       SALESMAN        7698 22-FEB-1981 00:00:00       1250        500         30
      7566 JONES      MANAGER         7839 02-APR-1981 00:00:00       2975                    20
      7654 MARTIN     SALESMAN        7698 28-SEP-1981 00:00:00       1250       1400         30
      7698 BLAKE      MANAGER         7839 01-MAY-1981 00:00:00       2850                    30
      7782 CLARK      MANAGER         7839 09-JUN-1981 00:00:00       2450                    10
      7788 SCOTT      ANALYST         7566 19-APR-1987 00:00:00       3000                    20
      7839 KING       PRESIDENT            17-NOV-1981 00:00:00       5000                    10
      7844 TURNER     SALESMAN        7698 08-SEP-1981 00:00:00       1500          0         30
      7876 ADAMS      CLERK           7788 23-MAY-1987 00:00:00       1100                    20
      7900 JAMES      CLERK           7698 03-DEC-1981 00:00:00        950                    30
      7902 FORD       ANALYST         7566 03-DEC-1981 00:00:00       3000                    20
      7934 MILLER     CLERK           7782 23-JAN-1982 00:00:00       1300                    10
14 rows selected.
SQL> select * from emp2;
     EMPNO ENAME      JOB              MGR HIREDATE                    SAL       COMM     DEPTNO
      7521 WARD       SALESMAN        7698 22-FEB-1981 00:00:00       1250        500         30
      7566 JONES      MANAGER         7839 02-APR-1981 00:00:00       2975                    20
      7782 CLARK      MANAGER         7839 09-JUN-1981 00:00:00       2450                    10
      7788 SCOTT      ANALYST         7566 19-APR-1987 00:00:00       3000                    20
      7839 KING       PRESIDENT            17-NOV-1981 00:00:00       5000                    10
      7900 JAMES      CLERK           7698 03-DEC-1981 00:00:00        950                    30
      7934 MILLER     CLERK           7782 23-JAN-1982 00:00:00       1300                    10
7 rows selected.
SQL> select * from emp
2 minus
3 select * from emp2;
     EMPNO ENAME      JOB              MGR HIREDATE                    SAL       COMM     DEPTNO
      7369 SMITH      CLERK           7902 17-DEC-1980 00:00:00        800                    20
      7499 ALLEN      SALESMAN        7698 20-FEB-1981 00:00:00       1600        300         30
      7654 MARTIN     SALESMAN        7698 28-SEP-1981 00:00:00       1250       1400         30
      7698 BLAKE      MANAGER         7839 01-MAY-1981 00:00:00       2850                    30
      7844 TURNER     SALESMAN        7698 08-SEP-1981 00:00:00       1500          0         30
      7876 ADAMS      CLERK           7788 23-MAY-1987 00:00:00       1100                    20
      7902 FORD       ANALYST         7566 03-DEC-1981 00:00:00       3000                    20
7 rows selected.If you actually need to know what columns data is different on "non-matching" rows (based on your primary key) then you'll have to compare column by column.

How to compare two files char by char

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