[Batch] Comparing Text Files

[Ironside]

Is it possible in batch, that it would compare 2 text files, and write everything that the 1st file hasn't that the 2nd one has into a 3rd text file?

I need it so I can finish my batch file, but I can't talk about it here, as it is against the rules...

 

[The Reborn Devil]

Comparing files in batch is possible I think, but writing everything one has which the other doesn't have is harder and I doubt it's possible. Just use C++ or Java or something similar.
You can easily run other batch files from a C++/Java program and vice versa.

 

[Ironside]

I know it's easier in other languages, but I'm a complete amatur in c++ and I don't know anything about Java at all....

I tried it with VB, but it was too advanced for my level...

So I'm kinda asking if someone is willing to do it for me in any language at all.

 

[The Reborn Devil]

I could probably make something like that in Java.

Edit: Do you want to check for certain words or do you want to check each file as a string and then compare the characters in that string?

F.ex.
File 1:
"asdasd"

File 2:
"esdasf"

File 3:
"ef"


Edit: Here it is, I did it like in that example I added, but it checks for things File 1 has which File 2 doesn't have (not what File 2 has which File 1 doesn't have) and it's easy to use. Just make a batch file and put it in the same folder as the .jar file below and do
"File Comparer.jar" <File 1> <File 2> <Result file>

Example:
"File Comparer.jar" Rofl.txt Omg.txt MUahahahahah.txt


If you get any errors or if it's not working correctly please notify me.

 

[swipe5weep]

It is possible to write the content of a text file into another text file but i don't think it can compare the contents it has. It maybe possible with some programming languages.

 

[Ironside]

The thing is, the 2nd file will always have a few lines more than the 1st text file.
And all lines that the 1st doesn't have and the 2nd has should be writen in the 3rd file

Also 1st file can never have something the 2nd hasn't got

 

[swipe5weep]

I am not sure if string subtraction is possible in batch.
Like:
A = Contents of a.txt
B = Contents of b.txt
C = B - A

We may be able to do that but my mind can't think today. lol

 

[Ironside]

I know it can be done, just not in batch... I heard that for one among the others VB could do it.

 

[The Reborn Devil]

The java file I came with supports different file sizes and it doesn't care if the first (or second in the Java app) file got stuff the other file doesn't have.

 

[Ironside]

It doesn't matter if it checks if the 1st is bigger than the 2nd aslong as it checks that the 2nd is bigger than the 1st aswell.

 

[The Reborn Devil]

It checks both files. I added it to ensure it wouldn't fuck up trying to compare data which doesn't exist and stuff.

 

[Ironside]

It's no problem if it checks both files.

 

[The Reborn Devil]

Good ^^

I failed in the post above
I said "I added it to ensure it would fuck up" when it should be "I added it to ensure it wouldn't fuck up" xD

 

[Ironside]

Yeah I noticed