Reading text file to JEditorPane
Hi,
I'm trying to read text file to JEditorPane and it works but first line is always missing. Here is the code for reading:
try {
in = new BufferedReader(new FileReader(filePathIn));
while ((lineIn = in.readLine()) != null) {
editorPane.read(in, new Object());
} catch (IOException ie)...Any suggestions?
in.readLine is changing the input stream position.
Do this instead:
FileInputStream in = new FileInputStream(filePathIn);
while (in.available() != 0)
editorPane.read(in, new Object());
Similar Messages
-
Reading Text file into JEditorPane
Hi i want to read a text file in to JEditorPane. one way is to read the whole file and make it a string and then display it. but i want to read directly form file into JEditor pane. Please help me to do that
-AshishPlz don't Reply
i am able to do it on my own here is the sample code for that
import javax.swing.*;
import java.awt.*;
import javax.swing.event.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
import javax.swing.text.*;
// this is a function u can use it in a class
private void addEditScroll(){
try{
BufferedReader infile = new BufferedReader(new FileReader("c:\\WS_FTP.log"));
editor =new JEditorPane();
editor.setEditable(false);
editor.read(infile,new PlainDocument());
editor.setSize(new Dimension(450,510));
editorscroll = new JScrollPane(editor);
editorscroll.setSize(new Dimension(450,510));
}catch(Exception ex){
ex.printStackTrace();
-ashish -
i am not able to read text file in 10g forms. using webutil.pll and webutil.lib
here i posted the code . i am not getting message 2, client_text_io.fopen is not working what could be the reason.
DECLARE
in_file client_TEXT_IO.FILE_TYPE;
V_LINE_COUNT number;
linebuf VARCHAR2(1800);
V_var1 varchar2(80);
V_var2 varchar2(80);
V_var3 varchar2(80);
V_var4 varchar2(80);
V_var5 varchar2(80);
filename VARCHAR2(30);
l_var number;
blnRet BOOLEAN;
begin
DELETE FROM NIRU_TEMP;
:file_path:=LTRIM(RTRIM(:file_path));
MESSAGE('1');
in_file := client_text_io.fopen(UPPER(:file_path),'r');
MESSAGE('2');
loop
V_LINE_COUNT := V_LINE_COUNT + 1;
client_text_io.get_line(in_file,linebuf);
MESSAGE('5');
V_var1 := substr(linebuf,1,(instr(linebuf,',')-1)) ;
MESSAGE('6'||V_VAR1);
MESSAGE('6'||V_VAR1);
l_var := length(v_var1);
V_var2 := substr(linebuf,l_var+2,(instr(linebuf,','))) ;
--V_var3 := substr(linebuf,15 ,10 );
V_var2 :=LTRIM(RTRIM(V_var2));
MESSAGE('6'||V_var2);
MESSAGE('6'||V_var2);
:p_id := v_var1;
:p_desc :=v_var2;
--IF V_var2 = '' THEN
--V_var3 :='';
--else
--V_var3 := TO_NUMBER(V_var2) ;
--end if;
--V_var5 := substr(linebuf,26 ,70 );
INSERT INTO NIRU_TEMP VALUES (V_var1,V_var2);
client_text_io.new_line;
:System.Message_Level := '20';
commit;
:System.Message_Level := '0';
--<<end_loop>>
--null;
next_record;
end loop;
client_TEXT_IO.FCLOSE(in_file);
exception
WHEN OTHERS THEN
MESSAGE('ERROR'||SQLCODE||' '||SQLERRM);
--exit;
end;Hello Francois,
You have a solution for this problem?
I have a problem like this. While reading a text file, such as size of 7MB, long, between 15-30 minutes.
See...
declare
arq client_text_io.file_type;
linha varchar2(800);
v_total number := 0;
v_icms number := 0;
begin
:valor_total := 0;
:valor_icms := 0;
arq := client_text_io.fopen(:arquivo,'r');
loop
client_text_io.get_line(arq,linha);
if substr(linha,1,1) = '1' then
v_total := v_total + (to_number(substr(linha,302,13))/100);
v_icms := v_icms + (to_number(substr(linha,262,13))/100);
end if;
end loop;
client_text_io.fclose(arq);
exception
when no_data_found then
:valor_total := v_total;
:valor_icms := v_icms;
message('Realizado com sucesso!');
message('Realizado com sucesso!');
end; -
How to read text file content in portal application?
Hi,
How do we read text file content in portal application?
Can anyone forward the code to do do?
Regards,
AnaghaCheck the code below. This help you to know how to read the text file content line by line. You can display as you require.
IUser user = WPUMFactory.getServiceUserFactory().getServiceUser("cmadmin_service");
IResourceContext resourceContext = new ResourceContext(user);
String filePath = "/documents/....";
RID rid = RID.getRID(filePath);
IResource resource = ResourceFactory.getInstance().getResource(rid,resourceContext);
InputStream inputStream = resource.getContent().getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
String line = reader.readLine();
while(line!=null) {
line = reader.readLine();
//You can append in string buffer to get file content as string object//
Regards,
Yoga -
How can I read text files from LAN if I only know the hostname?
I'm new in Java Developing, and dont know the written classes yet. I need help, how to do the following steps?
<p>1. How can I read text files from LAN if I only know the hostname, or IP address?
<p>2. How to read lines from text files without read all lines from the beginning of file, just seek to a position.
(ex. how can I read the 120th line?)
<p>Please help!
<p>sorry for the bad englishI'm new in Java Developing, and dont know the written classes yet. I need help, how to do the following steps?
1. How can I read text files from LAN if I only know the hostname, or IP address?You need to know the URL of the file. You need to know the hostname, port, protocl and relative path.
The hostname is server, not file.
2. How to read lines from text files without read all lines from the beginning of file, just seek to a position.Use the seek() to get to a random byte.
(ex. how can I read the 120th line?)The only way to find the 120th line is to read the first 120 lines. You can use other file formats to find the 120th line without reading the whole file but to need to be able to detremine where the 120th line is -
How to read text file contain chinese character ?
Hi XI Expert,
I have scenario to read text file contain Chinese Character using sender file adapter. but every i was check from sxmb_moni all the chinese character looks different. and also the target file also i has changes.
Please advise me how to maintaine the chinese character in PI 7.0 SP17.
Thank You and Best Regards
FernandHi,
Refer these threads..
Receiver file adapter corrupting characters
Problem in converting special characters in input text file
Here is one more useful guide..
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/502991a2-45d9-2910-d99f-8aba5d79fb42
Regards,
Sarvesh
Edited by: Sarvesh Singh on Nov 17, 2008 3:47 PM -
Need to read text file content and have to display it in multiline text box
dear all,
Need to read text file content and have to display it in multiline text box.
actually im new to file handling. i have tried up to get_line and put_line.
in_file := TEXT_IO.FOPEN ('D:\SAMPLE.txt', 'r');
TEXT_IO.GET_LINE (in_file,linebuf);
i dont know how to assign this get_line function to text item
pls help me in this regards,Simply write:
in_file := TEXT_IO.FOPEN ('D:\SAMPLE.txt', 'r');
TEXT_IO.GET_LINE (in_file,linebuf);
:block2.t1 := chr(10)||:block2.t1||chr(10)||linebuf;
chr(10) --> is for new line character -
Read text file insert into table using utl_file
Hi
i have script for read and insert into table but i want error records load into error table so i sent you my script and please fix the error log table
script
DECLARE
v_line VARCHAR2(2000);
v_file utl_file.file_type;
v_dir VARCHAR2(250);
v_filename VARCHAR2(50);
BEGIN
v_dir :='MID5010_DOC1TP';
v_filename := 'OPT_CM_BASE.txt';
v_file := utl_file.fopen(v_dir, v_filename, 'r');
LOOP
BEGIN
utl_file.get_line(v_file, v_line);
EXCEPTION
WHEN no_data_found THEN
EXIT;
END ;
v_line := REPLACE(v_line,'|','|~');
INSERT
INTO optum_icd10cm_base VALUES
( REPLACE(TRANSLATE(regexp_substr(v_line,'[^|~]+',1,1),'a~','a'),'.'),
TRANSLATE(regexp_substr(v_line,'[^|~]+',1,2),'a~','a'),
TRANSLATE(regexp_substr(v_line,'[^|~]+',1,3),'a~','a'),
TRANSLATE(regexp_substr(v_line,'[^|~]+',1,4),'a~','a'),
TRANSLATE(regexp_substr(v_line,'[^|~]+',1,5),'a~','a'),
CASE
WHEN LENGTH(regexp_substr(v_line,'[^|~]+',1,6)) < 10
THEN to_date(ltrim(TRANSLATE(regexp_substr(v_line,'[^|~]+',1,6),'a~','a'),'0'),'mm-yyyy')
ELSE to_date(TRANSLATE(regexp_substr(v_line,'[^|]+',1,6),'a~','a'),'mm-dd-yyyy')
END,
CASE
WHEN LENGTH(regexp_substr(v_line,'[^|~]+',1,7)) < 10
THEN to_date(ltrim(TRANSLATE(regexp_substr(v_line,'[^|~]+',1,7),'a~','a'),'0'),'mm-yyyy')
ELSE to_date(TRANSLATE(regexp_substr(v_line,'[^|]+',1,7),'a~','a'),'mm-dd-yyyy')
END,
CASE
WHEN LENGTH(regexp_substr(v_line,'[^|~]+',1,8)) < 10
THEN to_date(ltrim(TRANSLATE(regexp_substr(v_line,'[^|~]+',1,8),'a~','a'),'0'),'mm-yyyy')
ELSE to_date(TRANSLATE(regexp_substr(v_line,'[^|]+',1,8),'a~','a'),'mm-dd-yyyy')
END,
CASE
WHEN LENGTH(regexp_substr(v_line,'[^|~]+',1,9)) < 10
THEN to_date(ltrim(TRANSLATE(regexp_substr(v_line,'[^|~]+',1,9),'a~','a'),'0'),'mm-yyyy')
ELSE to_date(TRANSLATE(regexp_substr(v_line,'[^|]+',1,9),'a~','a'),'mm-dd-yyyy')
END,
CASE
WHEN LENGTH(regexp_substr(v_line,'[^|~]+',1,10)) < 10
THEN to_date(ltrim(TRANSLATE(regexp_substr(v_line,'[^|~]+',1,10),'a~','a'),'0'),'mm-yyyy')
ELSE to_date(TRANSLATE(regexp_substr(v_line,'[^|]+',1,10),'a~','a'),'mm-dd-yyyy')
END,
TRANSLATE(regexp_substr(v_line,'[^|~]+',1,11),'a~','a')
-----commit;
END LOOP;
utl_file.fclose(v_file);
END;
text file
A50.0||Short|Long|Full|01-01-2009|01-2009||01-01-2013|09-18-2012|C|
A50.1||Short|Long|Full|01-01-2009|01-01-2009||001-2013|09-18-2012|C|
A50.2||Short|Long|Full|01-01-2009|01-01-2009|67|01-01-2013|09-18-2012|C|
A50.3||Short|Long|Full|011-2009|01-01-2009||01-01-2013|09-18-2012|C|
A50.4||Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|5|
A50.5|R|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A50.6||Short|Long||01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A50.7||Short||Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
2345||Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A60.0|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A60.1|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A60.2|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A60.3|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A60.4|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A60.5|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A60.6|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A60.7|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A60.8|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A60.9|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A70.0|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A70.1|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A70.2|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A70.3|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A70.4|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
B222|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A4.1|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A4.2|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A4.3|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A4.4|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A4.5|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A4.6|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A4.7|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A4.8|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A4.9|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A5.0|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A5.1|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A5.2|D|Short|Long|Full|01-01-2009|01-01-2009|01-10-2013|01-01-2013|09-18-2012|C|
A5.3|D|Short|Long|Full|01-01-2009|01-01-2009|01-10-2013|01-01-2013|09-18-2012|C|
D642|D|Short|Long|Full|01-01-2009|01-01-2009|01-10-2013|01-01-2013|09-18-2012|C|
A5.5|D|Short|Long|Full|01-01-2009|01-01-2009|01-10-2013|01-01-2013|09-18-2012|C|
A5.6|D|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A5.7|C|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A001|C|Short Updated|Long Updated|Full Updated|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A009|C|Short Updated|Long Updated|Full Updated|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A5.10|C|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A0109|C|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
F10.0|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
F10.1|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
F10.2|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
F10.3|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
F10.4|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
F10.5|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
F10.6|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
F10.7|N|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A30|C|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A316|C|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
A317|C|Short|Long|Full|01-01-2009|01-01-2009||01-01-2013|09-18-2012|C|
----clearly read text file insert into table and error records load into error table
please help mehI
i am using utl_file prepared script but i got error like 01861. 00000 - "literal does not match format string"
script:
DECLARE
f utl_file.file_type;
s VARCHAR2(32000);
f1 VARCHAR2(100);
f2 varchar2(100);
F3 VARCHAR2(100);
F4 VARCHAR2(100);
F5 VARCHAR2(100);
F6 DATE;
F7 DATE;
F8 DATE;
F9 DATE;
F10 DATE;
f11 CHAR(1);
BEGIN
--DBMS_OUTPUT.ENABLE(100000);
f := utl_file.fopen('MID5010_DOC1TP', 'OPT_CM_BASE.txt', 'R');
LOOP
BEGIN
UTL_FILE.GET_LINE(f, s);
f1 := REGEXP_SUBSTR (s,'[^|]+',1,1);
f2 := REGEXP_SUBSTR (REPLACE(s,'||','||'),'[^|]+', 1,2);
F3 := REGEXP_SUBSTR (REPLACE(s,'||','||'),'[^|]+', 1,3);
F4 := REGEXP_SUBSTR (REPLACE(s,'||','||'),'[^|]+', 1,4);
F5 := REGEXP_SUBSTR (REPLACE(s,'||','||'),'[^|]+', 1,5);
F6 := to_date(REGEXP_SUBSTR (REPLACE(s,'||','||'),'[^|]+',1,6),'mm-dd-yyyy');
F8 := to_date(REGEXP_SUBSTR (REPLACE(s,'||','||'),'[^|]+',1,8),'mm-dd-yyyy');
F7 := to_date(REGEXP_SUBSTR (REPLACE(s,'||','||'),'[^|]+',1,7),'mm-dd-yyyy');
F9 := to_date(REGEXP_SUBSTR (REPLACE(s,'||','||'),'[^|]+',1,9),'mm-dd-yyyy');
F10 :=to_date(REGEXP_SUBSTR (REPLACE(s,'||','||') ,'[^|]+',1,10),'mm-dd-yyyy');
f11 := REGEXP_SUBSTR (REPLACE(s,'||','||'),'[^|]+', 1,11);
INSERT
INTO OPTUM_ICD10CM_BASE
( CODE,
STATUS,
SHORT_DESCRIPTION,
LONG_DESCRIPTION,
FULL_DESCRIPTION,
CODE_EFFECTIVE_DATE,
CHANGE_EFFECTIVE_DATE,
TERMINATION_DATE,
RELEASE_DATE,
CREATION_DATE,
VALIDITY
VALUES
F1,
F2,
F3,
F4,
F5,
F6,
F7,
F8,
F9,
F10,
f11
EXCEPTION
WHEN NO_DATA_FOUND THEN
EXIT;
END;
END LOOP;
UTL_FILE.FCLOSE(F);
END;
please help me(in my org looks utl_file standards only) -
Can I save and read text files on a server that I host?
Hello everyone,
I am a java hobbiest. I was wondering if I set up my own server, running out of my house, could I have my applets save to my computer and read from my computer without having to learn JDBC and a DATABASE language. In other words could i just have my applet save and read text files from and to my server?
I'm trying to set up a sight for my 5th grade class where parents can log into. Thanks for your time.
Oh yeah, which is easier, learning how to set up a server or learning JDBC and a DATABASE language?
If you have any other good idease please tell me them
Thank you, BryanShort answer: This isn't gonna work
Long answer: For this to work, the first thing you're going to need is a static IP address and a DNS name registered -actually you don't necessarily need #2 but you're probably gonna want it and it's by far the easier of the steps.
As far as I know to get a fixed IP address you've either gotta be directly attached to a larger network (ie university network) or get a leased line from an ISP.
Once you've got that done come back to us. -
If possible 2 read text files in nokia 6070 mobile...
i have nokia 6070 mobile.i want 2 save & read my text files.if possible 2 read text files in nokia6070 mobile?
Yes it is possible by installing a java based app.
You can find some here. -
Read text file and insert into MySQL
Dears,
I need to read text file and then insert the data in the correct column in the MySQL database
example
I have the following text file:
field1=1234 field2=56789 field3=444555
field1=1333 field2=2222 field3=333555
and so on and so forth ,,note that all rows are identical and just the filed value is changed(there is a dilemeter between fields)
how can I read field1,field2 and field3 from text file and insert them in the correct table and column in the database.....
any help?????
thanks for your cooperation
Best RegarsSure.
Which part don't you understand?
1. Reading a text file
2. Parsing the text file contents.
3. Relational databases and SQL.
4. How to create a database.
5. How to connect to a database in Java.
6. How to insert records into the database in Java.
7. How to map Java objects to records in a database.
This is a pretty nice list. Solve complex problems by breaking them into smaller ones.
% -
How to create and read text file using LabVIEW 7.1 PDA module?
How to create and read text file using LabVIEW 7.1 PDA module? I can not create a text file and read it.
I attach my code here.
Attachments:
File_IO.vi 82 KBWell my acquisition code runs perfect. The problem is reading it. I can't seem to read my data no matter what I do. My data gets saved as a string using the array to string vi but I've read that the string to array vi (which I need to convert back to array to read my data) does not work on the pda. I'm using version 8.0. So I was trying to modify the program posted in this discussion so that it would save data from my DAQ. I did that but I still can't read the data after its saved. I really don't know what else to do. All I need to do is read the data on the pda itself. I can't understand why I'm having such a hard time doing that. I found a possible solution on another discussion that talks about parsing the strings because of the bug in the "string to array" vi. However, that lead me to another problem because for some reason, the array indicators or graphs don't function on the pda. When i build the program to the pda or emulator, the array indicators are faded out on the front panel as if the function is not valid. Does this kind of help give a better picture of what I'm trying to do. Simply read data back. Thanks.
-
To read text file using utl_file
I would like to read test_file_out.txt which is in c:\temp folder.
create or replace create or replace directory dir_temp as 'c:\temp';
grant read, write on directory dir_temp to system;
then when i execute the below code i get the error .
// to read text file using utl_file
DECLARE
FileIn UTL_FILE.FILE_TYPE;
v_sql VARCHAR2 (1000);
BEGIN
FileIn := UTL_FILE.FOPEN ('DIR_TEMP', 'test_file_out.txt', 'R');
UTL_FILE.PUT_LINE (FileIn, v_sql);
dbms_output.put_line(v_sql);
UTL_FILE.FCLOSE (FileIn);
END;
ERROR:
invalid file operation
i would like to use ult_file only and also can you let me know to read the text file and place its contents in tmp_emp table?Are you trying to read the contents of the file into the local variable? Or write the contents of the local variable to the file?
Your text talks about reading the file. And you open the file in read mode. But then you call the UTL_FILE.PUT_LINE method which, as SomeoneElse points out, attempts to write data to the file. Since the file is open in read-only mode, you cannot write to the file.
If the goal is really to read from the file, replace the UTL_FILE.PUT_LINE calls with UTL_FILE.GET_LINE. If the goal is really to write to the file, you'll need to open the file in write mode ('W' rather than 'R' in the FOPEN call).
Justin -
How to read text file efficiently?
I use CharBuffer to read text file:
private List<String> load() throws IOException {
final String B = "<BODY>";
final String E = "</BODY>";
List<String> docs = new ArrayList<String>();
for (File file : files) {
FileReader reader = new FileReader(file);
CharBuffer buffer = CharBuffer.allocate(BSIZE);
StringBuilder sb = new StringBuilder();
while (reader.read(buffer) != -1) {
char[] dst = new char[buffer.length()];
buffer.get(dst);
sb.append(dst);
buffer.clear();
String s = sb.toString();
System.out.println(file + ": " + s.length());
int start = 0;
int i, j;
while ((i = s.indexOf(B, start)) != -1) {
j = s.indexOf(E, i + B.length());
docs.add(s.substring(i + B.length(), j));
start = j + E.length();
//System.out.printf("%d %d %d%n", i, j, start);
return docs;
}The file size is 1324350, but the code say it is 772802.
What's wrong with this code?
I want to read text file as quickly as possible.
Is this code the right way to read file?
Should I use FileReader or nio Channel and ByteBuffer?
Any suggestions are welcome!You are reading the file as if it were encoded in UTF-16. Each character uses two bytes so you have half the number of characters as you had bytes.
The following code reads an entire file in one hit.
public static String readText(File file) throws IOException {
byte[] bytes = new byte[(int) file.length()];
DataInputStream dis = new DataInputStream(new FileInputStream(file));
try {
dis.readFully(bytes);
} finally {
dis.close();
return new String(bytes, "UTF-8"); // or whatever your file encoding is.
}But you can still have less characters than bytes if there are any non ASCII-7 characters. -
How to read text file line by line...?
how to read text file line by line, but the linefeed is defined by user, return list of string, each line of file is a item of list?
please help me.
Thanks very muchBrynjar wrote:
In Groovy, you would do something like:
linefeed = "\n" //or "\r\n" if the user chose so
lines = new File('pathtofile').text.split("${linefeed}")This is one of the things that has always annoyed me about Sun's sdk, i.e. the lack of easy ways to do things like that. You always end up making your own utilities or use something like Apache's commons.io. Same goes for jdbc and xml - I'll wait for appropriate topics to show how easy that is in Groovy :)I generally agree, but what I really don't like about the Groovy text-file handling niceties: They don't care about encoding/always use the default encoding. And as soon as you want to specify the encoding, it gets a lot more complex (granted, it's still easier than in Java).
Maybe you are looking for
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