Problem while reading a file

[gunjannigam]

I am trying to read from a text file which of size 1 MB, and contains 5000 lines of data.
Following is the code of class which I am using to read from the file

public class PlayFile extends Timer implements ActionListener{
    File filename;
    BufferedReader out;
    //float frameid,prev_frameid;
    public PlayFile(File file, int interval)
    {
        super(interval,null);

        FileInputStream fstream = null;
        try {
            filename = file;
            fstream = new FileInputStream(file);
            DataInputStream in = new DataInputStream(fstream);
            out = new BufferedReader(new InputStreamReader(in));
            this.addActionListener(this);
            out.readLine();
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            try {
                fstream.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }
public void actionPerformed(ActionEvent e)
    {
        try {
            if(out.ready())
            {
                String br = out.readLine();
                String[] inputfile = new String[69];
                for(int i = 0;i<69;i++)
                    inputfile[i]= br.split("\t")[i];
                for(int i = 0;i<69;i++)
                   System.out.print(inputfile[i]+" ");
                System.out.println();
                //playData(inputfile);

            }
            else
                this.stop();
        } catch (IOException ex) {

                ex.printStackTrace();
            }


    }


}

It reads 25 lines of data and after that it starts giveing the following exception.

java.io.IOException: Read error
        at java.io.FileInputStream.readBytes(Native Method)
        at java.io.FileInputStream.read(FileInputStream.java:199)
        at java.io.DataInputStream.read(DataInputStream.java:132)
        at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:264)
        at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:306)
        at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:158)
        at java.io.InputStreamReader.read(InputStreamReader.java:167)
        at java.io.BufferedReader.fill(BufferedReader.java:136)
        at java.io.BufferedReader.readLine(BufferedReader.java:299)
        at java.io.BufferedReader.readLine(BufferedReader.java:362)
        at dynamicgraph.GPlot$PlayFile.actionPerformed(GPlot.java:817)
        at javax.swing.Timer.fireActionPerformed(Timer.java:271)
        at javax.swing.Timer$DoPostEvent.run(Timer.java:201)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

The only line no indiacted for my program in the error is

dynamicgraph.GPlot$PlayFile.actionPerformed(GPlot.java:817)

and this line contains the readLine() method to read the file. I am not able to guess the reason why does it stop reading after 25 lines