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Problem with IO java class method, newOutputStream(CREATE), program won't compile

Posted on 2012-03-10
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Last Modified: 2012-03-10
Hello Experts,
I am getting a compilation error with the program below. I don't understand why because the code is straight from the book. The problem according to Eclipse is the newOutStream() method which is supposed to come from the java.nio.file.StandardOpenOption.* class, which as you can see is imported into the file. The error hint states; "The method newOutputStream(StandardOpenOption) is undefined for the type Path". Help needed please. I hope I provided enough info.

import java.nio.file.*;
import java.io.*;
import java.nio.ByteBuffer;
import static java.nio.file.StandardOpenOption.*;
public class CreateEmptyEmployeesFile
{
   public static void main(String[] args)
   {
      Path file =
         Paths.get("C:\\JavaPrograms\\Data.txt");
      String s = "000,       ,00.00" + System.getProperty("line.separator");
      byte[] data = s.getBytes();
      ByteBuffer buffer = ByteBuffer.wrap(data);
      final int NUMRECS = 1000;
      try
      {
         OutputStream output = new BufferedOutputStream(file.newOutputStream(CREATE));
         BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(output));
         for(int count = 0; count < NUMRECS; ++count)
             writer.write(s, 0, s.length());
         writer.close();
      }
      catch(Exception e)
      {
          System.out.println("Error message: " + e);
      }

   }
}

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Question by:robertben
  • 3
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5 Comments
 
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Expert Comment

by:rrz
ID: 37706024
Instead of using
OutputStream output = new BufferedOutputStream(file.newOutputStream(CREATE));

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try using
OutputStream output = new BufferedOutputStream(Files.newOutputStream(file, CREATE));

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Author Comment

by:robertben
ID: 37706067
That worked great. I don,t understand why there is any problem with the code to begin with. It came straight out of the Joyce Farrell, Java Programming book. There is another similar problem program. The code is listed below. I tried to modify the statement similar to the way you presented the solution to the earlier problem, but it did not work. Eclipse is giving me an error message for the checkAccess(READ, EXECUTE) method. The error message is: "The method checkAccess(AccessMode, AccessMode) is undefined for the type Path". I am not sure if I should start another thread for this. I increased the points

package pathDemos;

import java.nio.file.*;
import static java.nio.file.AccessMode.*;
import java.io.IOException;
public class PathDemo3
{
   public static void main(String[] args)
   {
      Path filePath = Paths.get("C:\\JavaPrograms\\Data.txt");         
      System.out.println("Path is " + filePath.toString());
      try
      {
         filePath.checkAccess(READ, EXECUTE);
         System.out.println("File can be read and executed");
      }
      catch(IOException e)
      {
         System.out.println("File cannot be used for this application");
      }
   }
}

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LVL 27

Expert Comment

by:rrz
ID: 37706118
Instead of using
filePath.checkAccess(READ, EXECUTE);

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you should use
filePath.getFileSystem().provider().checkAccess(filePath, READ, EXECUTE);

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>why there is any problem with the code to begin with. It came straight out of the Joyce Farrell, Java Programming book  
Google says
 that book was published in Feb 2011  
that Java 7 waslaunched on July  2007  
I guess a lot of the API was changed in those 3+ years.
0
 
LVL 27

Accepted Solution

by:
rrz earned 500 total points
ID: 37706127
error above  
Google says
 that book was published in Feb 2007  
that Java 7 was launched on July  2011
0
 

Author Closing Comment

by:robertben
ID: 37706134
error above  
Google says
 that book was published in Feb 2007  
that Java 7 was launched on July  2011

Yes, I was wandering about that.
Thanks. I will probably need more help with this chapter, but I'll start a new post.
0

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