Using BufferedReader to read Text File

Question

I m having problems with using the BufferedReader  I want to print the 6 lines of a text file   public class Reader    public static void main String  args  throws IOException       FileReader in   new FileReader  C  test txt        BufferedReader br   new BufferedReader in        while  br readLine      null            System out println br readLine               in close         Now from what I can gather every time I call the readLine   method it automatically advances to the next line   So I can t use the condition br readLine      null since it ll already advance it one line and I get the output   Line 2 Line 4 Line 6   What Condition do I use to check if there is still a new line in the text field   Thanks in advance

User · Answer

Maybe you mean this   public class Reader    public static void main String  args  throws IOException       FileReader in   new FileReader  C  test txt        BufferedReader br   new BufferedReader in       String line   br readLine        while  line  null            System out println line           line   br readLine              in close

User · Answer

you can store it in array and then use whichever line you want   this is the code snippet that i have used to read line from file and store it in a string array  hope this will be useful for you     public class user    public static void main String x    throws IOException    BufferedReader b new BufferedReader new FileReader   lt path to file gt        String   user new String 30     String line       while   line   b readLine       null       user i  line      System out println user 1       i

User · Answer

private void readFile   throws Exception         AsynchronousFileChannel input AsynchronousFileChannel open Paths get  E  dicom server storage abc txt   StandardOpenOption READ         ByteBuffer buffer ByteBuffer allocate 1024         input read buffer 0 null new CompletionHandler lt Integer Void gt              Override public void completed     Integer result     Void attachment             System out println  Done reading the file                        Override public void failed     Throwable exc     Void attachment             System err println  An error occured     exc getMessage                                    System out println  This thread keeps on running          Thread sleep 100

User · Answer

You can assign the result of br readLine   to a variable and use that both for processing and for checking  like so   String line   br readLine    while  line    null       You might also want to check for empty      System out println line       line   br readLine

User · Answer

or   public String getFileStream final String inputFile            String result               Scanner s   null           try               s   new Scanner new BufferedReader new FileReader inputFile                 while  s hasNext                      result   result   s nextLine                            catch  final IOException ex                ex printStackTrace              finally               if  s    null                    s close                                    return result      This gets first line as well

User · Answer

Try   String text  br readLine    while  text    null       System out println text     text br readLine      in close

User · Answer

You read line  through while loop and through the loop you read the next line   so just read it in while loop       String s   while   s br readLine       null         System out println s

User · Answer

Use try with resources  this will automatically close the resources   try  BufferedReader br   new BufferedReader new FileReader  C  test txt           String line      while   line   br readLine       null            System out println line           catch  Exception e

User · Answer

This is the problem   while  br readLine      null        System out println br readLine         You ve got two calls to readLine - the first only checks that there s a line  but reads it and throws it away  and the second reads the next line  You want   String line  while   line   br readLine       null        System out println line       Now we re only calling readLine   once per loop iteration  and using the line that we ve read both for the  have we finished   and  print out the line  parts

[java] Using BufferedReader to read Text File

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