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Thread: Using the fileReader?

  1. #1
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    Default Using the fileReader?

    I am trying to read 3 lines from a .txt file and then write those lines to another created .txt file. The problem I have is that the compiler doesn't find my file. I have the .java and .class and the .txt file in the same exact location (a folder in my desktop). What am I doing wrong? Here's what I have started:
    import java.io.*; 
    public class FileCopyDemo0 { 
      public static void main(String args[]) throws IOException {
            File file = new File("ppp.txt");
    	FileReader fr = new FileReader("ppp.txt"); 
    	BufferedReader br = null;
        br = new BufferedReader(fr); 
        String s; 
        while((s = br.readLine()) != null) { 
          System.out.println("line read was: " + s);

    Also, why would I be getting a nullPointerException at the br = new BufferedReader(fr); line?

  2. #2
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    Default Re: Using the fileReader?

    As it stands, your code will work if everything is sharing the same directory.
    Not sure if it could be a classpath issue, but for now make sure the name of your text file is ppp and not ppp.txt (with .txt extension too, i.e. make sure your file isnt ppp.txt.txt )
    Just a guess.
    Please use [highlight=Java]//code goes here...[/highlight] tags when posting your code

  3. #3
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    Default Re: Using the fileReader?

    omg thank you so much. The issue WAS that it was named "ppp.txt.txt". I wish I would have found this out so long ago.


  4. #4

    Default Re: Using the fileReader?

    you would require to place the text file ppp.txt under the root directory of the project or you need to provide the full path of the text file when you are creating File Object. For example FileReader fr = new FileReader("E:\ \JavaApplication2\ppp.txt"); or File file = new File("E:\ \JavaApplication2\ppp.txt ");

    Hope u satisfied with this.
    and thanks

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