Solved

Compare lines

Posted on 2004-10-04
4
185 Views
Last Modified: 2010-03-31
How can i compare a line of a file with every line of another file?
0
Comment
Question by:mmartha
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 92

Assisted Solution

by:objects
objects earned 100 total points
ID: 12222676
BufferedReader in1 = new BufferedReader(new FileReader(file1));
BufferedReader in2 = new BufferedReader(new FileReader(file2));
String line1 = null;
String line2 = null;
while ((line1=in1.readLine())!=null && (line2=in2.readLine())!=null)
{
   if (line1.equals(line2))
   {
      System.out.println("match");
   }
   else
   {
      System.out.println("mismatch");
   }
}
in1.close();
in2.close();
0
 
LVL 37

Accepted Solution

by:
zzynx earned 400 total points
ID: 12224380
That compares each line of file1 with the corresponding line of file2.
The question was: "How can i compare a line of a file with *every line* of another file?

What line of the first file do you want to compare with every line of a second file?

final int NR_OF_LINE = 5;  // assuming you want to compare the 5th line of file1 with every line in file2:

BufferedReader in1 = new BufferedReader(new FileReader(file1));
BufferedReader in2 = new BufferedReader(new FileReader(file2));
String line1 = null;
String line2 = null;
int lineNr = 0;
// Get the 5th line of file1:
while ( lineNr!=NR_OF_LINE && (line1==in1.readLine())!=null )
  lineNr++;
in1.close();

// compare that line which every line of file2
while ( (line2=in2.readLine())!=null ) {
   if (line1.equals(line2)) {
      System.out.println("match");
   }
   else {
      System.out.println("mismatch");
   }
}
in2.close();
0
 
LVL 2

Author Comment

by:mmartha
ID: 12278581
zzynx,
your answer have some errors, but give me the idea.
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12284307
Thanks
0

Featured Post

Salesforce Has Never Been Easier

Improve and reinforce salesforce training & adoption using WalkMe's digital adoption platform. Start saving on costly employee training by creating fast intuitive Walk-Thrus for Salesforce. Claim your Free Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

INTRODUCTION Working with files is a moderately common task in Java.  For most projects hard coding the file names, using parameters in configuration files, or using command-line arguments is sufficient.   However, when your application has vi…
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
This theoretical tutorial explains exceptions, reasons for exceptions, different categories of exception and exception hierarchy.
This video teaches viewers about errors in exception handling.
Suggested Courses

739 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question