How to read a line of string?

Hi, I am very new to java programming. Can anyone show me a method of a simple way to read a line of characters into a string? I look over the internet but all seems awfully complicated like easyReader..etc which you have to import more other classes to make it to work. I just need it to be as simple as just to read a line into string.
Thank you...

Hi, try this..
import java.io.*;
public class rt
     public static void main(String[] args) throws IOException
          BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
          String s = r.readLine();
          System.out.println(s);
}hope this helps,
mfg
bbm1277

Similar Messages

How to read and write a string into a txt.file

Hi, I am now using BEA Workshop for Weblogic Platform version10. I am using J2EE is my programming language. The problem I encounter is as the above title; how to read and write a string into a txt.file with a specific root directory? Do you have any sample codes to reference?
I hope someone can answer my question as soon as possible
Thank you very much.

Accessing the file system directly from a web app is a bad idea for several reasons. See http://weblogs.java.net/blog/simongbrown/archive/2003/10/file_access_in.html for a great discussion of the topic.
On Weblogic there seems to be two ways to access files. First, use a File T3 connector from the console. Second, use java.net.URL with the file: protocol. The T3File object has been deprecated and suggests:
Deprecated in WebLogic Server 6.1. Use java.net.URL.openConnection() instead.
Edited by: m0smith on Mar 12, 2008 5:18 PM

How to read specific line in a file through UNIX shell script..

Dear Friends,
I have generated .ldt file under admin/import/US folder through FND_LOAD script for Download the responsibility.
I registred Shell script (Host concurrent program) in Oracle apps. Now i want to read the file in speciific line which i was generated in admin/import/US folder through unix shell script. Please help me how to read specific line and the i want to replace that which i am going to read the specific line.
Thanks in advance..
Regards,
Velu.

Hi,
Thanks for reply,
My requirement i have to find the specific line in a file and find and replace needed word over there it's should happen programatically. i want to read specific line in a file Once complete find and replace the condition should exists. The loop will go to next file and read the same line in next file also do the same process upto how many files over there.i am doing through UNIX shell script. Please help me out to find the
Your suggestion is highly appriciated.
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Velu.

How to read current line number in function module sourrce code?

Hi All,
How to read current line number in function module sourrce code?
regards,
Anuj

If you have new editor you would be able to see the line number.
Or in the Dump screen - there is a button called Debugger - click that you would be able to see the code where dump has occured.. you would be able to find the line number from there.
To get the new editor with line number , you need to change the settingsin SE38.
Regards
Vivek

How to read multiple lines using 'REUSE_ALV_GRID_DISPLAY'

Hi,
In ALV report the FM 'REUSE_ALV_GRID_DISPLAY' used.
EXPORTING
I_CALLBACK_PROGRAM = W_REPID
I_CALLBACK_PF_STATUS_SET = 'PF_STATUS'
I_CALLBACK_USER_COMMAND = 'USER_COMMAND'
How to read multiple lines in the following dynamic subroutine ?
I am able to read single value through p_selfld.
Nut the requirement is to change the values in more than 1 row for a fld (edit mode)
FORM USER_COMMAND USING P_UCOMM TYPE SY-UCOMM
P_SELFLD TYPE SLIS_SELFIELD.
endform
Thanks in advance

You can get the reference by a dirty assign, but this is not offcially supported...
But if you have some limitations.
FORM user_command USING fuw_ucomm LIKE sy-ucomm
                                   fuw_selfield TYPE slis_selfield.
FIELD-SYMBOLS: <lfs_grid> type ref to cl_gui_alv_grid,
                               <lfs_row> type LVC_S_ROW.
data: li_rows type lvc_t_row.
      assign ('(SAPLSLVC_FULLSCREEN)GT_GRID-GRID') to <lfs_grid>.
      check sy-subrc is initial.
      call method <lfs_grid>->get_selected_rows
        IMPORTING
          et_index_rows = li_rows.
endform.                    "user_command

How to read every line from a text file???

How can i read every line from my text file ("eka.txt")
now it only reads the first line and prints it out.
What is wrong with this?
import java.io.*;
import java.util.*;
class Testi{
     public static void main(String []args)throws IOException {
     BufferedReader stdin=new BufferedReader(new InputStreamReader(System.in));
File inputFile = new File ("eka.txt");
FileReader fis =new FileReader(inputFile);
BufferedReader bis = new BufferedReader(fis);
String test=bis.readLine();
String tmp= "";
while((bis.readLine().trim() != null)) {
int spacefound=0;
int l=test.indexOf(" ");
     for(int i=0;i<test.length();i++){
     char c=test.charAt(i);
     if(c!=' ') tmp+=""+c;
     if(c==' ' && (spacefound<1) && !(tmp.equals(""))){
     tmp+=""+c;
     spacefound++;
     if(tmp.length()==l) {
     System.out.println(tmp);
     tmp="";
     spacefound=0;
     if(tmp.length()<l){
     for(int i=0;i<=(l-tmp.length());i++)
     tmp+=""+' ';
     System.out.println(tmp);

Try this code, Hope it servers your purpose.
import java.io.*;
import java.util.*;
class Testi {
     public static void main(String []args)throws IOException {
          BufferedReader stdin=new BufferedReader(new InputStreamReader(System.in));
          File inputFile = new File ("Eka.txt");
          FileReader fis =new FileReader(inputFile);
          BufferedReader bis = new BufferedReader(fis);
          String test=bis.readLine();
          while(test != null) {
               StringTokenizer st = new StringTokenizer(test," ");
               while(st.hasMoreTokens())
                    System.out.println(st.nextToken());
               test = bis.readLine();
}Sudha

How to read some lines from a text file using java.

hi,
i m new to java and i want to read some lines from a text file based on some string occurrence in the file. This file to be read in steps.
we only want to read the file upto the first Occurrence of "TEXT" string.
How to do it ,,,
Kinldy give the code
Regards,
Sagar
this is the text file
dfgjdjj
sfjhjkd
ghjkdg
hjkdgh TEXT
ikeyt
ujt
jk
tyk TEXT
rukl
r

Hendawy wrote:
Since the word "TEXT" is formed of 4 letters, you would read the text file 4 bytes by four bytes. Wrong on two counts. First, the file may not be encoded 1 byte per character. It could be utf-16 in which case it would be two byte per character. Second, even if it were 1 byte per character, the string "Text" may not start on a 4 byte boundary.
Consider a FileInputStream object "fis" that points to your text file. use fis.read(byte[] array, int offset, int len) to read every four bytes. Convert the "TEXT" String into a byte array "TEXT".getBytes(), and yous the Arrays class to compare the equality of the read bytes with your "TEXT".getBytes()Wrong since it relies on my second point and will fail when fis.read(byte[] array, int offset, int len) does not read 4 bytes (as is no guaranteed to). Check the Javadoc. Also, the file may not be encoded with the default character encoding.
The problem is easily solved by reading a line at a time using a BufferedReader wrapping an InputStreamReader wrapping a FileInputStream and specifying the correct character encoding.
Edited by: sabre150 on Apr 29, 2009 2:13 PM

How to read random lines?

Hi everyone,
I am trying to write a program that will take a random lines from a number text files and copy them to a new document.
Is there a way to read specific lines in a document?
For example if I set an int array to hold 20 random numbers, (23, 504, 498, etc...)
can i then jump to each of these lines in the document and output the data on each line??
I have tried the RandomAccessFile seek method but that only moves a certain number of bytes(not lines).
I have also tried:
String tempLine = null;
// where numLines is the total number of lines in the document
// where randInput is my RandomAccessFile
For (int i = 0; i < numLines; i++)
tempLine = (randInput.readLine())
for(int k = 0; k < 20; k++)
if(i == randNums[k])
out.println(tempLine);
but this method is too slow, as some of my input files are over 500,000 lines in length.
Can anyone please suggest a faster more efficient method??
Many Thanks

If that is really the requirement then I suggest you
pre-process the file into some other form so it is
easier to fulfil the requirement.
For example you could copy the lines into a database
table, then choose random records from the table. Or
you could copy the lines into a new file where all
the lines had the same length (pad with blanks or
nulls or whatever you need to get back the original
line), which would make it possible to seek to line N.How about cache first the file, by reading the each line in the file and store that line in an array?
ie.
package com.yahoo.ronilloang.idunoifthisright;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.Vector;
* How about caching first then randomly read? This maybe slow or definitely slow in performance.
* @author     Ronillo Ang
public class CacheFirstThenRandomlyPick{
     private String[] lines;
     private int lineCount;
     public CacheFirstThenRandomlyPick(String fileName) throws IOException{
          File file = new File(fileName);
          if(file.exists()){
               BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
               String line = bufferedReader.readLine();
               while(line != null){
                    addLine(line);
                    line = bufferedReader.readLine();
               trim();
               randomlyPickAndWrite();
               bufferedReader.close();
     private void addLine(String line){
          if(lines == null)
               lines = new String[10];
          checkAndExpandCapacityAsNeeded(lineCount + 1);
          lines[lineCount++] = line;
     private void checkAndExpandCapacityAsNeeded(int minCapacity){
          int oldCapacity = lines.length;
          if(minCapacity > oldCapacity){
               int newCapacity = oldCapacity * 2;
               while(minCapacity >= newCapacity)
                    newCapacity += 10;
               String[] oldLines = lines;
               lines = new String[newCapacity];
               System.arraycopy(oldLines, 0, lines, 0, lineCount);
     private void trim(){
          if(lineCount > 0 && lineCount < lines.length){
               String[] oldLines = lines;
               lines = new String[lineCount];
               System.arraycopy(oldLines, 0, lines, 0, lineCount);
     private void randomlyPickAndWrite() throws IOException{
          Vector drawnNumber = new Vector();
          BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(new File("out.txt")), "8859_1"));
          for(int index = 0; index < lineCount; ++index){
               int whatLineToRead = (int)(Math.random() * lineCount);
               while(drawnNumber.contains(String.valueOf(whatLineToRead)))
                    whatLineToRead = (int)(Math.random() * lineCount);
               drawnNumber.addElement(String.valueOf(whatLineToRead));
               bufferedWriter.write(lines[whatLineToRead]);
               bufferedWriter.newLine();
          bufferedWriter.flush();
          bufferedWriter.close();
     public static void main(String[] args) throws IOException{
          if(args.length == 1){
               SimpleDateFormat sdf = new SimpleDateFormat("hh:mm:ss", Locale.getDefault());
               System.out.println("Program start at " + sdf.format(new Date()));
               new CacheFirstThenRandomlyPick(args[0]);
               System.out.println("Program ended at " + sdf.format(new Date()));
          else
               System.out.println("Usage: java com.yahoo.ronilloang.idunoifthisright.CacheFirstThenRandomlyPick <text file>");
          System.out.println("\ndone.");
}What do you think? Definitely wrong? Okay. This just what I think. Never mind.
Thank you. -Ronillo

How to read partcicular line from a txt file

in a text file let there be 50 lines
while reading the line if the line is having "name" as a string in that line then i have to store the next two consecutive lines in a string as array....
Similar way and so on......
How can we do this....

You need a BufferedReader:
http://java.sun.com/j2se/1.4.2/docs/api/java/io/BufferedReader.html
for example:try {
    BufferedReader br = new BufferedReader(new FileReader("myfile.txt"));
    String line;
    while ( (line=br.readLine()) != null ) {
     if (line.indexOf("name") != -1) {
         // Store the next two lines.
         // You will need to call br.readLine() again.
} catch (IOException x) {
    x.printStackTrace();
}

How to read complete line displayed thru ALV report on double click? urgent

Hi guys,
An ALV report is displayed using 'REUSE_ALV_LIST_DISPLAY' and i have a requirement such that i have to read the line item on which double click is done.
I have to fetch the line item, field by field and not by characters. I have attached the function code and all using PF status.
Please tell me an approach as how to fetch the line item on which double click is done.
Points will be rewarded.
Regards
Rahul

Hi ..
i did report with belnr , bukrs , Gjahr . which will call the transcation code FB03 displaing thedocument ...
please cut and paste the report it will work ..
REPORT zdemo_alvgrid                 .
TABLES:   bkpf . " ekko.
type-pools: slis.                                 "ALV Declarations
*Data Declaration
TYPES: BEGIN OF t_ekko,
BUKRS   like bkpf-BUKRS,
BELNR like bkpf-BELNR,
GJAHR like bkpf-GJAHR,
BLART like bkpf-BLART,
BLDAT like bkpf-BLDAT,
BUDAT like bkpf-BUDAT,
MONAT like bkpf-MONAT,
XBLNR like bkpf-XBLNR ,
* ebeln TYPE ekpo-ebeln,
* ebelp TYPE ekpo-ebelp,
* statu TYPE ekpo-statu,
* aedat TYPE ekpo-aedat,
* matnr TYPE ekpo-matnr,
* menge TYPE ekpo-menge,
* meins TYPE ekpo-meins,
* netpr TYPE ekpo-netpr,
* peinh TYPE ekpo-peinh,
END OF t_ekko.
DATA: it_ekko TYPE STANDARD TABLE OF t_ekko INITIAL SIZE 0,
      wa_ekko TYPE t_ekko.
*ALV data declarations
data: fieldcatalog type slis_t_fieldcat_alv with header line,
      gd_tab_group type slis_t_sp_group_alv,
      gd_layout    type slis_layout_alv,
      gd_repid     like sy-repid,
      gt_events     type slis_t_event,
      gd_prntparams type slis_print_alv.
*Start-of-selection.
START-OF-SELECTION.
perform data_retrieval.
perform build_fieldcatalog.
perform build_layout.
perform build_events.
perform build_print_params.
perform display_alv_report.
*&      Form BUILD_FIELDCATALOG
*       Build Fieldcatalog for ALV Report
form build_fieldcatalog.
* There are a number of ways to create a fieldcat.
* For the purpose of this example i will build the fieldcatalog manualy
* by populating the internal table fields individually and then
* appending the rows. This method can be the most time consuming but can
* also allow you more control of the final product.
* Beware though, you need to ensure that all fields required are
* populated. When using some of functionality available via ALV, such as
* total. You may need to provide more information than if you were
* simply displaying the result
*               I.e. Field type may be required in-order for
*                    the 'TOTAL' function to work.
fieldcatalog-fieldname   = 'BUKRS'.
fieldcatalog-seltext_m   = 'Purchase Order'.
fieldcatalog-col_pos     = 0.
fieldcatalog-outputlen   = 10.
fieldcatalog-emphasize   = 'X'.
fieldcatalog-key         = 'X'.
* fieldcatalog-do_sum      = 'X'.
* fieldcatalog-no_zero     = 'X'.
append fieldcatalog to fieldcatalog.
clear fieldcatalog.
fieldcatalog-fieldname   = 'BELNR'.
fieldcatalog-seltext_m   = 'PO Item'.
fieldcatalog-col_pos     = 1.
fieldcatalog-outputlen   = 10.
   fieldcatalog-emphasize   = 'X'.
fieldcatalog-key         = 'X'.
    append fieldcatalog to fieldcatalog.
clear fieldcatalog.
fieldcatalog-fieldname   = 'GJAHR'.
fieldcatalog-seltext_m   = 'Status'.
fieldcatalog-col_pos     = 2.
fieldcatalog-outputlen   = 10.
fieldcatalog-emphasize   = 'X'.
fieldcatalog-key         = 'X'.
    append fieldcatalog to fieldcatalog.
clear fieldcatalog.
fieldcatalog-fieldname   = 'BLART'.
fieldcatalog-seltext_m   = 'Item change date'.
fieldcatalog-col_pos     = 3.
append fieldcatalog to fieldcatalog.
clear fieldcatalog.
fieldcatalog-fieldname   = 'BLDAT'.
fieldcatalog-seltext_m   = 'Material Number'.
fieldcatalog-col_pos     = 4.
append fieldcatalog to fieldcatalog.
clear fieldcatalog.
fieldcatalog-fieldname   = 'BUDAT'.
fieldcatalog-seltext_m   = 'PO quantity'.
fieldcatalog-col_pos     = 5.
append fieldcatalog to fieldcatalog.
clear fieldcatalog.
fieldcatalog-fieldname   = 'MONAT'.
fieldcatalog-seltext_m   = 'Order Unit'.
fieldcatalog-col_pos     = 6.
append fieldcatalog to fieldcatalog.
clear fieldcatalog.
fieldcatalog-fieldname   = 'XBLNR'.
fieldcatalog-seltext_m   = 'Net Price'.
fieldcatalog-col_pos     = 7.
fieldcatalog-outputlen   = 15.
* fieldcatalog-do_sum      = 'X'.
* fieldcatalog-datatype     = 'CURR'.
append fieldcatalog to fieldcatalog.
clear fieldcatalog.
** fieldcatalog-fieldname   = 'PEINH'.
** fieldcatalog-seltext_m   = 'Price Unit'.
** fieldcatalog-col_pos     = 8.
** append fieldcatalog to fieldcatalog.
* clear fieldcatalog.
endform.                    " BUILD_FIELDCATALOG
*&      Form BUILD_LAYOUT
*       Build layout for ALV grid report
form build_layout.
gd_layout-no_input          = 'X'.
gd_layout-colwidth_optimize = 'X'.
gd_layout-totals_text       = 'Totals'(201).
* gd_layout-totals_only        = 'X'.
* gd_layout-f2code            = 'DISP'. "Sets fcode for when double
*                                         "click(press f2)
* gd_layout-zebra             = 'X'.
* gd_layout-group_change_edit = 'X'.
* gd_layout-header_text       = 'helllllo'.
endform.                    " BUILD_LAYOUT
*&      Form DISPLAY_ALV_REPORT
*       Display report using ALV grid
form display_alv_report.
gd_repid = sy-repid.
call function 'REUSE_ALV_GRID_DISPLAY'
       exporting
            i_callback_program      = gd_repid
            i_callback_top_of_page   = 'TOP-OF-PAGE' "see FORM
            i_callback_user_command = 'USER_COMMAND'
*            i_grid_title           = outtext
            is_layout               = gd_layout
            it_fieldcat             = fieldcatalog[]
*            it_special_groups       = gd_tabgroup
            it_events               = gt_events
            is_print                = gd_prntparams
            i_save                  = 'X'
*            is_variant              = z_template
       tables
            t_outtab                = it_ekko
       exceptions
            program_error           = 1
            others                  = 2.
if sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
endif.
endform.                    " DISPLAY_ALV_REPORT
*&      Form DATA_RETRIEVAL
*       Retrieve data form EKPO table and populate itab it_ekko
form data_retrieval.
select BUKRS
BELNR
GJAHR
BLART
BLDAT
BUDAT
MONAT
XBLNR up to 10 rows
from bkpf
into table it_ekko.
*select ebeln ebelp statu aedat matnr menge meins netpr peinh
* up to 10 rows
* from ekpo
* into table it_ekko.
endform.                    " DATA_RETRIEVAL
* Form TOP-OF-PAGE                                                 *
* ALV Report Header                                                 *
Form top-of-page.
*ALV Header declarations
data: t_header type slis_t_listheader,
      wa_header type slis_listheader,
      t_line like wa_header-info,
      ld_lines type i,
      ld_linesc(10) type c.
* Title
wa_header-typ = 'H'.
wa_header-info = 'EKKO Table Report'.
append wa_header to t_header.
clear wa_header.
* Date
wa_header-typ = 'S'.
wa_header-key = 'Date: '.
CONCATENATE sy-datum+6(2) '.'
               sy-datum+4(2) '.'
               sy-datum(4) INTO wa_header-info.   "todays date
append wa_header to t_header.
clear: wa_header.
* Total No. of Records Selected
describe table it_ekko lines ld_lines.
ld_linesc = ld_lines.
concatenate 'Total No. of Records Selected: ' ld_linesc
                    into t_line separated by space.
wa_header-typ = 'A'.
wa_header-info = t_line.
append wa_header to t_header.
clear: wa_header, t_line.
call function 'REUSE_ALV_COMMENTARY_WRITE'
       exporting
            it_list_commentary = t_header.
*            i_logo             = 'Z_LOGO'.
endform.
*       FORM USER_COMMAND                                          *
*       --> R_UCOMM                                                *
*       --> RS_SELFIELD                                            *
FORM user_command USING r_ucomm LIKE sy-ucomm
                  rs_selfield TYPE slis_selfield.
* Check function code
CASE r_ucomm.
    WHEN '&IC1'.
*   Check field clicked on within ALVgrid report
    IF rs_selfield-fieldname = 'BELNR'.
*     Read data table, using index of row user clicked on
      READ TABLE it_ekko INTO wa_ekko INDEX rs_selfield-tabindex.
*     Set parameter ID for transaction screen field
      SET PARAMETER ID 'BES' FIELD   wa_ekko-bELNR .
      SET PARAMETER ID 'MES' FIELD   wa_ekko-bUKRS .
      SET PARAMETER ID 'DES' FIELD    wa_ekko-GJAHR .
*     Sxecute transaction ME23N, and skip initial data entry screen
*      CALL TRANSACTION 'FB03' AND SKIP first screen.
SUBMIT RFBUEB00
*        WITH ALCUR ...
*        WITH ARCHOBJ ...
*        WITH ARCH_SEL ...
*        WITH ARUSETYP ...
*        WITH AUTBEXNO ...
*        WITH AUTH_BUK ...
*        WITH AUTH_LDR ...
*        WITH BR_AWKEY ...
*        WITH BR_AWSYS ...
*        WITH BR_AWTYP ...
        WITH BR_BELNR = wa_ekko-bELNR
*        WITH BR_BLART ...
*        WITH BR_BLDAT ...
*        WITH BR_BUDAT ...
        WITH BR_BUKRS =    wa_ekko-bUKRS
*        WITH BR_CPUDT ...
        WITH BR_GJAHR = wa_ekko-GJAHR
*        WITH BR_RLDNR ...
*        WITH BR_SEQ ...
*        WITH BR_USNAM ...
*        WITH BR_XBLNR ...
*        WITH EXCDT ...
*        WITH P_STATS ...
*        WITH STATISTK ...
*        WITH STATUSD ...
*        WITH STATUSL ...
*        WITH STATUSM ...
*        WITH STATUSS ...
*        WITH STATUSV ...
*        WITH TCODE ...
*        WITH UNAME ...
*        WITH XEMUCNV ...
*        WITH XUSEAR ...
*        WITH XUSEAS ...
*        WITH XUSEDB
        AND RETURN .
    ENDIF.
ENDCASE.
ENDFORM.
*&      Form BUILD_EVENTS
*       Build events table
form build_events.
data: ls_event type slis_alv_event.
call function 'REUSE_ALV_EVENTS_GET'
       exporting
            i_list_type = 0
       importing
            et_events   = gt_events[].
read table gt_events with key name = slis_ev_end_of_page
                           into ls_event.
if sy-subrc = 0.
    move 'END_OF_PAGE' to ls_event-form.
    append ls_event to gt_events.
endif.
    read table gt_events with key name = slis_ev_end_of_list
                           into ls_event.
if sy-subrc = 0.
    move 'END_OF_LIST' to ls_event-form.
    append ls_event to gt_events.
endif.
endform.                    " BUILD_EVENTS
*&      Form BUILD_PRINT_PARAMS
*       Setup print parameters
form build_print_params.
gd_prntparams-reserve_lines = '3'.   "Lines reserved for footer
gd_prntparams-no_coverpage = 'X'.
endform.                    " BUILD_PRINT_PARAMS
*&      Form END_OF_PAGE
form END_OF_PAGE.
data: listwidth type i,
        ld_pagepos(10) type c,
        ld_page(10)    type c.
write: sy-uline(50).
skip.
write:/40 'Page:', sy-pagno .
endform.
*&      Form END_OF_LIST
form END_OF_LIST.
data: listwidth type i,
        ld_pagepos(10) type c,
        ld_page(10)    type c.
skip.
write:/40 'Page:', sy-pagno .
endform.
reward points if it is usefull ...
Girish

How to read multiple lines from a command prompt?

I usually read from a command prompt like this:
String answer;
System.out.println("Please enter the required data");
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
answer = reader.readLine();
reader = null;
} catch (Exception e) {
System.out.println("There was an exception trying to read " + e);
answer = "";
This has worked fine for years when all I wanted was one line answers.
Now I am trying to prompt for multiple line answers. Is there a way to read into a string array rather than just a string? What class would I use for that?
Thanks a lot!

The easiest approaches would be to read a line at a time until you've read enough lines, whether by a known fixed line count, or a token count, or by reading some sentinel toek, OR read a token at a time using Scanner.next() until you've determined you're done. Which one is more appropriate depends on your situation.

How to read characters from a string ?

Hi,
In my java program I accepted string from the user and now I want to calculate the length of the string, and then read characters one by one to encrypt it.
How to read the characters one by one ? Like Mid$ function in VB.
Small code to illustrate will be appreciated.

Hi,
Pick one!
public class A
public static void pokeAtString( String s )
    for( int i = 0; i < s.length(); ++i )
      System.out.print( s.charAt( i ) );
public static void useCharArray( String s )
    char[] c = s.toCharArray();
    for( int i = 0; i < c.length; ++i )
      System.out.print( c[i] );
public static void main( String[] args )
    String s = "Once was a good man.";
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    pokeAtString( s );
    System.out.print( "\nuseCharArray: " );
    useCharArray( s );
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}Enjoy,
Manfred.

How to remove new line from string

I have a string say following
String line = "one\ntwo\nthree";Now i am trying to remove new line from string. For this i did following
String txt = line.replaceAll("\\n","");But i see still new line is occuring. Is it correct way. Please advice me.

Ok. I was just using \n instead of \r\n. And i am in windows. I will give a try with \r\n
Ok i tried using following , but it doesnt work.
line = line.replaceAll("\\r\n","");Am i missing anything here. Please guide me.
Edited by: ArpanaK on Oct 8, 2007 4:44 PM

How to discover multi-line of String that will come Flex by Java?

Hi all,
I am programming a little application by using Java and Flex.
One of the functions that Flex contains will have the responsibility to
send the TextArea value to Java as parameter.
But that value could contain multi-lines string. Java recieved successfully but the problem that Java read it as single line.
so, how can I fix this problem?

Hi,
so, is there any solution available right now for my problem.
A text that will come from TextArea that could contains multi-lines
will be sent to Java as paramenter.
How can I distinguish the multi-lines onec I deal with it as String?

How to read last line from a .txt file?

Hello
I have a string: e.g. "my name is John"
and i wanna verify if this string is equal with the last line from a text file
for example, if in the txt file i have:
asdasd
sdgsdfgasd
asdfgadfgadf
sdgasdgsdf
my name is john
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asdgsdfg
dsfhsdfhsd
sdgasdfg
sdgsdg
my name is Jdfgsdg
this is not correct
How should i do this?
Thanks:)

Read from the beginning an discard all lines (if you have a small file), or use RandomAccessFile and scan from the end till you find the beginning of the last line.
Kaj

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