1. First Line in a file is to be replaced. coderanch.comHello, I need to replace the first line in a file. Assume that a file contains a number of records and the first line of that file is holding the Record Count of that file. If in future i update this file by inserting more records, then i need to update the Record Count also. Record Count is in the first ... |
2. line brakes in string to file coderanch.comHi OK the topic heading sounds wierd but the problem is that i want to create html files in java. So i have string: html=" text"+"\n"+""; So when i System.out.println(html); i get: text Now i want that to be written into a file. For that i thought i use PrintWriter class, but i think i picked a wrong one. It writes ... |
3. Perfect new line coderanch.comI am using the below code to append the data at the end of the line for every time. but the problem is the new line is not correctly started . so the new line start from the middle of the line and keeps increasing for every new line. suggest me to go for a write api. PrintWriter out1 = new ... |
4. add/delete random lines coderanch.comWhat's the size of the file and how often is it updated? If the answers are "only a few Kb" and "not very often" then it's hardly worth changing it. If not, are your records fixed length? Can you make them fixed length? If so, then when a key is removed from the file just overwrite it with nuls or whatever. ... |
5. org.jdom.JDOMException: Error on line -1: Premature end of file. coderanch.comHi, I am getting the following Exception while building the XML Document from String. org.jdom.JDOMException: Error on line -1: Premature end of file. at org.jdom.input.SAXBuilder.build(SAXBuilder.java:300) at org.jdom.input.SAXBuilder.build(SAXBuilder.java:650) The code is like this : try{ SAXBuilder builder=new SAXBuilder(); doc=builder.build(new StringReader(xml_Content.trim())); }catch(JDOMException e){ e.printStackTrace(); System.out.println("..............error while building the XML--Document "+e.getCause()+"-"+e.getMessage()); } Here xml_Content is String Object.What might be the reason. anybody knows please ... |
6. Reading lines in nio coderanch.comHello Friends, I am trying to develop a Java Program using java.nio., this programs simply reads a text file and prints one line at a time on the screen as well as on another file, a.txt. My problem is i am getting empty spaces being printed on screen and some unreadable characters written on a.txt. Plz help import java.io.*; import java.nio.*; ... |
7. Delete One Line in a File coderanch.comI have text files that contains a list of the current employees. One line is one employee and the file has about 3000 lines. Using the Apache Common Net FTPClient, I am able to append to the file when a new employee is hired. If an employee resigns, quits, or retires, I would need a way to delete this one line ... |
8. Delete specific line coderanch.comHi, Following are the line in a file [26/Nov/2004:01:24:08 +0530] SSLv3 RC4-MD5 "GET / HTTP/1.1" 1266 [27/Nov/2004:01:24:08 +0530] SSLv3 RC4-MD5 "GET /style.css HTTP/1.1" 7679 [28/Nov/2004:01:24:08 +0530] HTTP/1.1" 7967 [29/Nov/2004:01:24:08 +0530] HTTP/1.1" 2173 [30/Nov/2004:01:24:08 +0530] HTTP/1.1" 2458 [1/DEC/2004:01:24:08 +0530] HTTP/1.1" 2563 [2/DEC/2004:01:24:08 +0530] HTTP/1.1" - Now I want to delete line of date 27/NOV/2004 Pls let me know how do I do ... |
9. reading last line of file coderanch.com |
10. Deleting a line from a file coderanch.comDear Readers, How do I delete a line from a file? I tried this: Copied the original file to a temp file skipping out the unwanted line Then deleting the original file Renaming the temp file to original file But since the original file has another refernce outside the method it is not being deleted. i think i am not being ... |
11. how to detect end of line coderanch.com |
12. notepad not supporting new line character coderanch.comI tried using '\r' and '\r\n' both, but it didnt work for me, Below is the code, here i have a array of bytes writing it to randomaccess file, before i write a byte array i append '\n' in the array output file if i open in editplus editor, data looks okie, but notepad doesnt recogrnise it, it prints a garbage ... |
13. How to read multiple lines of input from command promt coderanch.comHi, I have a requirement to send multiple lines of input from the command line. once i run my programme a promt has to be set with the name given during running the programme. then on-wards it should contineu with the same promt to recieve other inputs. Can any one help me out for this.. Thanks in Advance |
14. reading line by line .. coderanch.com |
15. read chunks instead of lines with bufferReader coderanch.com |
16. write reversed lines to a file coderanch.comI have a file named apples.txt that has 3 sentences in it. The code below reads the first sentence and reverses it, but does not write the reversed sentence to the new output file. I want it to read and reverse all 3 sentences and then write the reversed sentences to the file revapples.txt. Any suggestions? Thanks. import java.io.*; import java.util.*; ... |
17. Reading the previous lines in a file coderanch.com |
18. reading from stdIn without "new line" "cr" "enter" coderanch.comHello There, I am tired of searching, prob. searching the wrong way but anyway I am trying to read from the standard imput, the keyboard. My problem is that the user does not press "enter", as soon as he press a key I would like to get it: printed out, whatever... All what I could find yet was always quited by ... |
19. reading content of files line by line coderanch.com |
20. to read first 5 lines and then next 5 coderanch.comHI All can any one help me how to read first x lines say(5) from a file ,and when i say getNextLines it should return me the lines from x+1 to some increment no of lines in the same file. i have tried it using BufferedReader and implemented using mark , but just helpless... pls provide me some sample code.... |
21. writing into the previous line coderanch.comWhat if.... File tempFile = new File("temp.txt"); //temporal file File currFile = new File("jedi.txt"); //current file BufferedReader reader = new BufferedReader(new FileReader(currFile)); PrintWriter writer = new PrintWriter(new FileWriter(tempFile)); String line = null; while( (line=reader.readLine())!=null){ if(line.equals("Anakin")){ //use regex here (i.e. String.matches()) writer.println("Mace Windu"); //before regex writer.println(line); writer.println("Yodah"); //after regex }else { writer.println(line); } } writer.close(); reader.close(); currFile.delete(); //delete old file tempFile.renameTo(currFile); //replace ... |
22. how to read lines in BuffredReader coderanch.com |
23. read lines after exception coderanch.comam reading a file line by line...But in some case some exception comes,i catch exception but program not exceute next line. please tell how skip the exception comes on line and exceute next line.I used this but it shows compilation error finally{ continue; } but it shows compilation error try { FileInputStream fstream = new FileInputStream(args[0]); log"); System.out.println(fstream); FileOutputStream fstream1 = ... |
24. System.out updating line coderanch.comThis is probably really simple but I have never come across it before. I am writing a transfer app and want to log progress back to the terminal. What I want to have is basically "Transfer: 50 of 600231". But I dont want to have a new line printed each time, just update the previous one. I know this is possible ... |
25. have to write in new line coderanch.com |
26. read blocks of lines from file coderanch.comHi, I am new to java. I have a large file it contains the lines. Each line will be terminated with \n. I do not want to read all lines at once, I would like to read some blocks of lines at once. I really did not find a method to read specified number of lines. I found there some methods ... |
27. Write multiple lines to file coderanch.com |
28. Appending contents in each line using Random AccessFile coderanch.com |
29. how to read a line and store the data! coderanch.comFor example, the input text file is like this: KWAFZRMYC 195.08 s 400 0 EDWWKTMYC 195.09 s 400 0 JSQPPHMYC 195.05 s 200 0 LQHTFMMYC 194.95 b 600 1 BTQFADMYC b 500 1 ZOOKNLMYC 195.07 b 400 1 TVZKDZMYC 195.01 b 300 1 First of all, how to read read this file line by line? After read the file, I need ... |
30. Read prev line in the file? coderanch.comHi, I'm trying to write an application, which reads data from a txt file. It reads one line, splits the line at "/" and displays the two split parts of this line in two text areas. I have a Back and a Next button in the panel, which should show previous/next line in the text areas, when clicked. I've been looking ... |
31. Find last line number in a file coderanch.comSorry, but you can't do that. (Assuming I've correctly guessed what you meant to say here, as opposed to what you actually said.) In order to find the line number, you will need to read each and every byte of the file, at least once. Because you can't possibly know how many lines there are without checking each byte to see ... |
32. [solved]:p how to keep "next line" during append String data to StringBuilder coderanch.comSorry for not being Joe If I got your question right, you want to read a text file completely into memory and afterwards do something with the Strings. Is that correct? If you want to store single lines, I'd opt for a List |
33. no.of lines in a file coderanch.com |
34. On line generation of HTML files coderanch.com |
35. sorting lines of strings in a file coderanch.comHi, here's my problem: I have this file which can be anywhere from 200 MB+, and within that file contains lines that look look like this: ENG|glucopyranoside|C0644705|L1129264|S1355824| So, what I want to do is sort by the 2nd field (glucopyranoside)alphanumerically. I've been trying to add each line to a list and sort using the collections.sort(), but I get out of memory ... |
36. How to Read the Last Line in the File coderanch.comHi all, I have a log File which is more than 20MB.I am trying to Write a code which can REad the File and provide me the Last Line in the File..I have tried by Finding the Total Number of Characters in the File and then Decremented the Position to get the Last Line in the File but it was a ... |
37. excluding 1st and last line from file coderanch.com |
38. Writing into a file without printing "\n" in seperate lines coderanch.comHello Friends, I am facing an issue that while writing to the file i am able to print "\n" for getting all the files in seperate line.But i want to avoid this i.e. i want to write in separate line but "\n" shouldnt be printed. I am using bf.newLine() for the separate lines... How can i avoid this? |
39. printing new line in file coderanch.comIf you're writing a text file, you should generally use Readers and Writers to work with it, not Streams. If you wrap an OutputStreamWriter around the FileOutputStream, and then a BufferedWriter around the OutputStreamWriter, you can use the BufferedWriter.newLine method to start a new line in the file. Note that the sequence of characters written by newLine is OS-dependent - it ... |
40. Writing line returns to file coderanch.comThe character and string escape sequences allow for the representation of some nongraphic characters as well as the single quote, double quote, and backslash characters in character literals (3.10.4) and string literals (3.10.5). EscapeSequence: \ b = /* \u0008: backspace BS */ \ t = /* \u0009: horizontal tab HT */ \ n = /* \u000a: linefeed LF */ \ f ... |
41. Inserting new line in the middle of a existing file coderanch.comWell you have several choices. You can read in the file, one line at a time, and write it to a temp file, and at the correct time shove your own line in there. When finished reading in the original file, write the temp file back out to it. You could read in input file into an array, and do an ... |
42. Reading a file. Is it possible to choose the line to start from? coderanch.com |
43. how to peep a java file with multiple error lines page by page in DOS?? coderanch.comthanks Arun again! well, this time your solution donest seem to work. i use the command "javac filename.java > anotherfilename", but there is nothing(blank) in "anotherfilename" which appears in the same directory as filename.java. i suppose this command might be only appiled in unix enviroment, not in DOS. any other idea about this problem? |
44. How to display line numbers/file name? coderanch.comJava API does not provide any direct way to do this but you can make use of printStackTrace() method. Write your debug statement such that it throws a Throwable and then catches it. Customize printStackTrace() to print the third line of the stack Trace. This will give you the class file and line number. Hope this helps. |
45. Counting blank lines in a file coderanch.comIt's possible that the problem is that differnt files have different types of line separators, and the number of lines depends on what you consider a line separator. On Unix \n is a separator, while on Windows it's \r\n, and on Mac I think it's \n\r maybe. BufferedReader and many programs have a flexible interpretation which may include each/all of these ... |
46. # of lines in a file? coderanch.comimport java.io.*; import java.util.*; public class LineNumbers { private String filename; public LineNumbers(String filename) { this.filename = filename; } public int getLineCount() throws IOException { BufferedReader reader = new BufferedReader(new FileReader(filename)); int count = 0; String line; while ((line = reader.readLine()) != null) { count++; } reader.close(); return count; } public static void main(String[] args) { try { LineNumbers lineNumbers = ... |
47. Blank lines in file throwing exception coderanch.comHappy Holidays! The problem is the program works just fine until it hits a blank line. Then the jvm takes up 99% of my resources and the my gui locks on my screen. Sry for the long code, but figure it'll be easier to diagnose. tried if(inputLine.equals("")continue; and if(inputLine.equals("")inputLine = reader.readLine(); no avail while(null != (inputLine = reader.readLine())) { tokenizer = ... |
48. Forcing CRLF as line terminator in file output coderanch.comHi, I feel foolish asking this but... What is the best way to ensure that text files contain CRLF as a line terminator when writing to a file? It should work identically on Windows and Unix. It's possible that the data will be written to the file on Unix, and I don't want the newline character to be |
49. reading a file by lines coderanch.comI wrote this a long time ago, i hardly remember what it does, it needs a little bit modifications to suit your need, but itll help you to get started. Good Luck. private void readWriteFileLine(String src, String dst) { try { FileWriter fw = new FileWriter(dst); BufferedWriter bw = new BufferedWriter(fw); FileReader fr = new FileReader(src); BufferedReader br = new BufferedReader(fr); ... |
50. Delete line in file coderanch.comDear all, How to delete 1 line from a file with a particular match. For example, I want to delete line in a file which is match the word "toto" ?? I just can write and read line from file but I don't know how to delete line in file?? Any idear? please help regards, moniphal |
51. printing a new line to file coderanch.com |
52. File writing 1 line at a time coderanch.com |
53. reading lines from file coderanch.comDo you mean how do you compile a .java file into bytecode? Or do you mean how do you parse a text file to see which line ends with a ";"? Your original post is rather ambiguous. If you are reading lines from a text file, you want some sort of class which reads the lines, either with a file reading ... |
54. checking file line's validity coderanch.comI am reading from a file, and storing it into an array. Each line must have the format of SSN|first|last|grade\humCredits|gpa If there a student with invalid info, I am supposed to reject it and store the rest into the array. It must have a boolean return value. I have written a basic definition, but I can't see to figure how to ... |
55. How to print out first few lines of a file? coderanch.comPlease can someone help me with the following? I have tried looking on the net for an example progeam or a tutorial but I didn't find anything. How can I make it so that my program prints out a specifed number of lines from a file (i.e a text file, html document) Any hints, example code will be appresiated! |
56. How to replace a line in a file coderanch.comOne problem with your current code is you are trying to overwrite the file every time. Essentially, here's the steps you'll need to take 1. Open the input file A 2. Create an output file B 3. Loop over every line in A a. If it DOES NOT start with "Page", write the current line to file B b. If it ... |
57. how do I get the next line in the file and tokenize it coderanch.com |
58. Reading the Portion of the file with the line numbes. coderanch.comHi, I have to read a file contents which size range from 100 KB to 200MB.This file contain the data of packet transmission between the system interfaces. So the file may contain 100 to 800000 lines (data). I have to parse each line and to draw in some format based on each line data.The file will be on the server.I have ... |
59. Line terminator in file coderanch.comHi, How can I understand which line terminator (windows or linux) used in file without reading file line by line? I need something like this but in java: (linux file utility) jeremyt@jeremyt-lt:~/Documents> file test-win.txt test-win.txt: ASCII text, with CRLF line terminators jeremyt@jeremyt-lt:~/Documents> file test-mac.txt test-mac.txt: ASCII text, with CR line terminators jeremyt@jeremyt-lt:~/Documents> file test-unix.txt test-unix.txt: ASCII text |
60. Reading multiple lines in a file to a single string. coderanch.comI have a the following file (Input.txt): AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB I need to store the data separated by an empty line into two separate strings. i.e num1="AAAAAAAAAAAAAAAAA.....AAA" num2="BBBBBBBBBBBBBBBBB......BBB" I am using the following code : in = new BufferedReader(new FileReader("Input.txt")); num1=in.readLine(); num2=in.readLine(); which does not work as num1= (first line of A's )AAAAAAAA... and num2=(second line of A's)AAAA... How can ... |
61. How to read file line by line and word by word? coderanch.compackage arrayList; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.DataInputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileWriter; import java.io.InputStreamReader; import java.io.Writer; import java.util.ArrayList; import java.util.Iterator; class FileRead { public static void main(String args[]) { try { ArrayList storeWordList = new ArrayList(); FileInputStream fstream = new FileInputStream("colorsANDnumbers.data "); // Get the object of DataInputStream DataInputStream in = new DataInputStream(fstream); BufferedReader br = new BufferedReader(new InputStreamReader(in)); ... |
62. Writing an Empty Line in a File.... coderanch.comHi Everyone, I want to write an empty line in a file. I am trying to save a String variable with the value newLine = "\n". And then trying to write it to the file using the method fileOutputStream.write(newLine.getBytes()). But the thing is i only get a black empty square rather than an empty line. |
63. Tokenizing a line and searching coderanch.comI have to write and read from a 'database-like text file. I'm simply trying to search through the text file for a certain value, the student ID. Each line represents one student. The format looks like: firstname lastname studentID SATscore firstName lastName studentID SATscore etc I'm basically trying to find a student by their student ID. My current attempt doesn't seem ... |
64. adding new lines? coderanch.comHi Guys, Im reading a file in and wanting to display it, but its all getting presented on one long line unlike it is in the text file? here is my code so far. try { String one = ""; String two = ""; fr = new FileReader("topp.txt"); in = new BufferedReader(fr); while ((one = in.readLine()) != null) { two = ... |
65. Reg:Reading file with 100,0000 lines coderanch.comHi, I am able to write 100,0000 lines to a file successfully but when i try to read the file using BufferedReader i get the exception. The code to read the file is given below import java.io.*; public class read { public read() { try { BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); String input =in.readLine(); String newline = System.getProperty("line.separator"); File f ... |
66. counting number of lines of system.out coderanch.comHi Joey, have a look to my posts. I'm programming a file splitter and I had the same questions. Could you post some code? Antonio // getting the total number lines within the file private int getTotalNumberOfLines() { try { totalNumberOfLines = 0; File file = new File(sourceFilePath); if (file.exists()) { fr = new FileReader(file); lnr = new LineNumberReader(fr); while (lnr.readLine() ... |
67. This is the Code to search a string in the last 100 lines of a file. coderanch.comThis code is throwing an error when the pattern is '{' but not in any other case import java.io.*; import java.util.regex.*; public class tailfunction { public int countNoOfLines(){ try{ File fw = new File("C:\\Users\\Sonia\\Documents\\LDAPnotes.txt"); BufferedReader pw = new BufferedReader(new FileReader(fw)); int count = 0; while((pw.readLine()) != null){ count = ++count; } return count; }catch(IOException e){ e.printStackTrace(); return 0; } } public ... |
68. Save variables from a Randomly choosen line in a input file? coderanch.comBasically I have made a program for school that reads text from a input file using scanner. The input file it has 60 rows, each row is in the format: lastname, firstname, major, # credits so the first 3 rows are like: Stokes,Simon,IS,115 Haag,Timothy,HIST,93 Vaccaro,Rodney,BIOL,84 I have the program reading the file with a while loop, and then a series of ... |
69. Read file X lines coderanch.comThis is how i read my data.txt file. String filename = request.getRealPath("/") + "/data.txt"; ServletOutputStream out = response.getOutputStream(); final int responseContentLength=7600; InputStream in = new FileInputStream(filename); byte[] bytes = new byte[responseContentLength]; int bytesRead; while ((bytesRead = in.read(bytes)) != -1) { out.write(bytes, 0, bytesRead); } in.close(); out.close(); I would like to read in bytes still, but is there a way to read ... |
70. Read file line by line coderanch.com |
71. Extra Characters at the end of each line coderanch.comHi there, I am experimenting with using the basic IO classes needed for the SCJP exam. I am trying to read the contents of one file using FileReader and BufferedReader, and then write this to another file using PrintWriter. However, whether I use the println() or the print() method of PrintWriter, I am getting extra characters at the end of each ... |
72. How can I replace the line of file? coderanch.comI would like to replace a line of file with my desired line. But there a problem in that when i write to file it becomes zero(0) KB.Here I am giving you my code.Can anyone help? TestingTool import java.io.*; import java.util.Scanner; import java.io.File; import com.sun.org.apache.xalan.internal.xsltc.compiler.Pattern; public class TestingTool{ private File file = null; private File file1 = null; private PrintWriter writer=null; ... |
73. To retrive a particular line from the file coderanch.comHello everyone, I am anisha. Am trying to retreive a particular line (the line which has my search keyword) from the text file. let me brief it up. now suppose am searching for a string in a textfile and i would like to retrive only that particular sentence from the file where the keyword is present. (sentence in the sense the ... |
74. how to write a new line on a file coderanch.com |
75. How to read only the First Line of the File coderanch.comHi , I need to parse a Text File as per our requirement . The File will be in the Fixed Format as shown below Means it starts with 11 and ends with 19 (The First Line is 11 the Header and 19 the Footer ) 11000001INTBNK0800182009111814350000 130000028301000000000000000000000000 25000003830110080140000027351.820002 26000004 30000005 170000028301000000000000000000000000 190000028301000000000000000000000000 Now my requirement is that i need to ... |
76. UNIX line break problem coderanch.comHello, I am trying to make a comma separated file, but I experience problems with line breaks, when opening the file with Notepad or reading the file into the financial system. The web server, where the file is created, is running on UNIX, and I need to be able to open the file on a Windows platform. When I open the ... |
77. Erase a line in a file and insert a new line onn that line. coderanch.com |
78. how to read from given line number coderanch.comJust use an empty "for" loop and read all the lines that come before the one you want to start with -- and then start reading the lines that count. There's no other way to do it -- if there were a library routine to do this, it would have to do the same thing. |
79. Problems with Matcher objects and the last line of a file coderanch.comI am working on a program that does file parsing, and previously was using a Scanner object in a loop to read each line like this: Scanner in = new Scanner(new FileReader(filename)); while (in.hasNextLine()) { String curr = in.nextLine(); } That's all well and good and it's very easy to read/understand, but it's horribly slow for really large files. I assume ... |
80. How to Make JAVA IO methods recognize new line? "\n" coderanch.com |
81. In Java, how to read from a specific line, given the line number? coderanch.com |
82. Highest Frequency of Letter(s) in each Line of File. coderanch.comRanchers, Need Java Advice and Code which reads a file(File.txt) and prints to the console a list of all the letters that occurred with the highest frequency in each line of the file, followed by the frequency. The list of letters should be an alphabetical list of upper case letters followed by an alphabetical list of lower case letters. ------------------------------- Sample ... |
83. Adding a ~ at the end of the line coderanch.com1) Read the file a line at a time. 2) Write each line with the '~' appended to a new file. 3) If 1) and 2) work OK then rename the original file to a temporary name. 4) Rename the new file to the name of the original file. 5) If all the above work OK then delete the original file ... |
84. max no of line in a java file coderanch.com |
85. Could not parse launch file. Error at line 0 coderanch.comHi all While i am running the JNLP application i am getting this error.I am getting the following in the exception and in the wrapped exception. JNLParseException[ Could not parse launch file. Error at line 0.] at com.sun.javaws.jnl.XMLFormat.parse(Unknown Source) at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source) at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source) at com.sun.javaws.Main.launchApp(Unknown Source) at com.sun.javaws.Main.continueInSecureThread(Unknown Source) at com.sun.javaws.Main$1.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Failed to find the ... |
86. Reading and deleting the same line in a File coderanch.comHello, I'm trying to read some lines from a file from the begging and delete those lines after reading them so that next time I don't have to read those which already being read. The problem is, till now I able to remove the last lines(s) using following code : public class FileOps { public static void main(String[]args)throws IOException{ File file ... |
87. print till the next blank line coderanch.comWelcome to JavaRanch! I added code tags to your post to make it easier to read. In th line p = text.indexOf(intIndex,old_p), both intIndex and old_p are defined as ints, but there is no String.indexOf() method that works on two ints. What were you going for there? I would think you'd want to look for a line separator. |
88. Reading lines of ints from file with a sentinel coderanch.comI have a text file with this: 65 78 65 89 25 98 -999 87 34 89 99 26 78 64 34 -999 23 99 98 97 26 78 100 63 87 23 -999 62 35 78 99 12 93 19 -999 the -999 at end of each line is my sentinel. Output: sum of each line. I can get it ... |
89. deleting lines from file coderanch.comHere i am using two threads 1) The first one will write data continuously to the file. 2) Every time reading some data from file and deleting that data only because i don't want old data. The second thread is to decrees the size of the file & to avoid confusion while reading. |
90. Read Line From file coderanch.comHello I've used text files to store data about students each line consists of student name, SSN, and score This is the problem:Given SSN, search into the file and if you find matching read the current line from beginning to display such output John F Smith:50.5 I've developed this class but when the matching occur i cannot read the the current ... |
91. fix reading only the last line of the file? coderanch.compublic void actionPerformed(ActionEvent e) { int returnVal = fileChooser.showOpenDialog(fileChooser); File file = null; if(returnVal == JFileChooser.APPROVE_OPTION) { file = fileChooser.getSelectedFile(); try { BufferedReader reader = new BufferedReader(new FileReader(file)); try { String s = reader.readLine(); // String s; while(s != null) { // writer.newLine(); pane.setText(s); s = reader.readLine(); System.out.println("hi"); } // reader.close(); } catch (IOException ex) { Logger.getLogger(openItemListener.class.getName()).log(Level.SEVERE, null, ex); } // ... |
92. Read File By Line go4expert.com |
93. How can I detect the end of a line in a file ? java-forums.orgHi folks, I would like to detect an end-of-line in my .txt file but can't find the right way to do. My program already detects the last word of the line so what I did is to look at each char of my last word using the "charAt()" method. More precisely, if I'm at position "i" of my word, I check ... |
94. writing a program to read a specific amount of lines from a file? java-forums.orghey my names scott am fairly new to java and am looking for a bit of help. Im looking to write a program that reads and prints out the first 10 lines of text from a file. Ive been learning java for around 2 weeks now but cannot find anywhere how to do this. Can somebody give me a hand? Thanks ... |
95. Java File making new line java-forums.orgHi, I've got a method which has a String and writes it to a file. The problem I got is everytime I want to add a new String it puts the new String right next to the old one on the file where as I want to make each new String on a new line if its written. So for example ... |
96. problem reading a files lines java-forums.org |
97. Write to a specific line in a file java-forums.org |
98. write to file one line at a time and keep all contents java-forums.org |
99. How to read file line by line with fixed number of characters java-forums.org |
100. Adding line numbers to code in output file java-forums.orgokay so here is my problem: The program should ask the user for input and output file names. The program should read the input file, add line numbers and write the result to the output file. Set a field width for the line number to 5. The line number should be followed by a semicolon and a space. Okay so far ... |