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Nikhil J Mohite
About BufferedReader
3 Answer(s)      2 years ago
Posted in : Java Beginners

I have created

FileInputStream fstream = new FileInputStream("E:\\TE MODULE\\Main Workspace\\OS PHASE 1\\input.txt");
DataInputStream in = new DataInputStream(fstream);
BufferedReader bfr = new BufferedReader(new InputStreamReader(in));
for(int i=0;i<10;i++) {
String Str = bf.readline();

here is my 10th line. now i want to move to 1st line. what should i do ?

View Answers

September 7, 2012 at 12:27 PM

Here is a code that reads the first line of the text file.

class Modify 
        public static void main(String[] args) {
                String line = "";
                int lineNo;
                         FileInputStream fstream = new FileInputStream("c:/emp.txt"); 
                         DataInputStream in = new DataInputStream(fstream);
                         String str="";
                         BufferedReader bfr = new BufferedReader(new InputStreamReader(in)); 
                        for (lineNo = 1; lineNo <=10; lineNo++) {
                                if (lineNo == 1) {
                                        line = bfr.readLine();
                } catch (IOException e) {
                System.out.println("Line: " + line);

September 7, 2012 at 12:28 PM

Here is another code that reads the file and moves back to the first line of the file using seek() method of RandomAccessFile class.


public class ReadAccessFile{
  public static void main(String[] args) throws IOException{
      File f=new File("c:/emp.txt");
  RandomAccessFile rand = new RandomAccessFile(f,"r"); 
  int i=(int)rand.length();;
  for(int ct = 0; ct < i; ct++){
  byte b = rand.readByte();
  catch(IOException e)

January 31, 2013 at 3:07 PM

Please don't use DataInputStream to read text. Unfortunately this example gets repeated again and again so can you remove it from your example.

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