How can I read and print a file in eclipse with relative paths?

Question

I'm trying to read a file in eclipse and print it. The problem is that the compiler always says to me that the file or directory doesn't exist. I have to use relative paths.

The relevant part of the project routes is:

uva.pfc.refactoringEngine.core <--Project
- ...
- src
  - uva.pfc.refactoringengine.core.actions <-- Actual Package
    - ...
    - CreateEnumSetPlusClas.java <--File from I want to read the EnumSetPlus.java file
  - ...
  - EnumSetPlus.java <-- File I want read and print

This is the code:

String total="";

File actual = new File("src/EnumSetPlus.java"); 

FileReader filereader = null; 

try { 
filereader = new FileReader(actual); 
} 
catch (FileNotFoundException e) { 
// TODO Auto-generated catch block e.printStackTrace(); 
} 

BufferedReader input = new BufferedReader(filereader); 

try { 
while ((line = input.readLine()) != null) 
{ 
total += line + "\n"; 
} 
input.close(); 
} 
catch (IOException e) {
// TODO Auto-generated catch block e.printStackTrace(); 
} 

System.out.println(total);

I think the problem is that I have to do something if I want the file path recognised by de eclipse project.

Could you help me??

Thaks beforehand.

Related: http://stackoverflow.com/questions/2308188/getresourceasstream-vs-fileinputstream — BalusC, Sep 05 '11 at 16:47

score 3 · Accepted Answer · answered Sep 05 '11 at 16:43

3

I'd use getClass().getResourceAsStream("/EnumSetPlus.txt") - this will look for the file on the root of the classpath (which is bin/, but all files from src go to bin). You then get an InputStream which you can adapt to Redaer via new InputStreamReader(stream, encoding)

answered Sep 05 '11 at 16:43

Bozho

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getResourceAsStream returns null and then throws and error :( – recluising Sep 05 '11 at 18:06
check if the file is indeed there (in bin) – Bozho Sep 05 '11 at 18:07
the getResourceAsStream should work. Are you sure you didn't forget the forward slash? – Bozho Sep 05 '11 at 18:57
sorry, You are right!, I seen the EnumSetPlus.class file in the bin directory before. I though it was the .java, but it was the .class. – recluising Sep 05 '11 at 19:00
I have copied the EnumSetPlus.java file into bin directory and... everything is ok!. Thanks!!! – recluising Sep 05 '11 at 19:01
One last thing, sorry because of my English level XD. I'm Spanish and maybe my writing is not the best it could!. – recluising Sep 05 '11 at 19:05
You should automate this - you should not rely on manual copying. Eclipse does not copy .java files, so perhaps you may want to rename this to .javax for example – Bozho Sep 05 '11 at 19:11

score 1 · Answer 2 · answered Sep 05 '11 at 16:43

1

In Eclipse the current working directory is src by default.

Try this

File actual = new File("EnumSetPlus.txt");

Also I would look into Kevin's answer too. :-)

answered Sep 05 '11 at 16:43

Swaranga Sarma

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Jean Logeart · Answer 3 · 2011-09-05T17:01:32.570

1

Try:

String filePath = "/EnumSetPlus.java";
File actual = new File(ClassLoader.getSystemResource(filePath).getFile());

edited Sep 05 '11 at 17:01

answered Sep 05 '11 at 16:51

Jean Logeart

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score 0 · Answer 4 · answered Sep 05 '11 at 16:43

0

Your example says that you want to read a file called EnumSetPlus.java but the source code is looking for a file called EnumSetPlus.txt.

answered Sep 05 '11 at 16:43

KevinS

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How can I read and print a file in eclipse with relative paths?

4 Answers4