Hi
This was the question asked in one of the interview I have to write a program but there should not be any import statements in the program as i need to ... |
I'm trying to implement some compression algorithms, and I need to deal with bits in Java.
What I need to do is that when I write the value 1 then the value ... |
Okay, so I want to read a file name myfile.txt and let's say I'll be saving it under this directory:
home/myName/Documents/workspace/myProject/files myfile.txt
hmmm.. I want to know what I should pass on the ... |
I would like the following to be printed
test1
test2
test3
test4
But I can't seem to get the text to the next line.
Please help
import java.io.*;
public class MainFrame {
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I would like to save text to a file such that certain paragraphs are indented (each line of the paragraph is indented). I'm using BufferedWriter or Scanner or whatever. How would ... |
I'm trying to write a string \n in a text file. But the result in the text file is a newline. I know that the \n represents a newline. But ... |
I have the following function for writing to a file:
public void writeToFile(String data) throws IOException {
FileWriter fstream = null;
try {
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What's the best way to write to the middle of a text file in Java?
I know that there's no getting around reading the entire file to memory and then writing ... |
Basically I've uploaded a text file to my host and I want to edit the file and read it with java. I've created the permissions for it but im not sure ... |
EDIT
This is my file reader, can I make this read it from bottom to up seeing how difficult it is to make it write from bottom to up.
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Hi all, Let's say that I have a class as an object somewhere in my program and I want to write this object down into a text file but not as ... |
Hi, See the following code. This is to read a file from input(System.in) & write it to a text file.but it's not working. Can anyone tell me why? Thanks Sudha /* This program uses the CheckFile class to check a file typed in by the user as a command-line argument */ import java.io.*; class ReadWrite { public static void main(String[] args) ... |
Were you expecting writeInt() on RandomAccessFile to write a text string containing the integer value? If so, that's not what it does. The writeInt() method on a RandomAccessFile writes the integer in its native binary form (always 4 bytes, not always readable text), not as text characters. If you want your text file to be human-readable, you need to convert your ... |
In a plain text file? Can't be done. MS Word uses a proprietory format to store information on the format and contents of a table. Unless you want to reverse-engineer their format. . . Maybe generating an HTML file would be an option? Creating an HTML table is pretty easy and everyone has a browser. |
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Long story short I was given a mundane task at work that a simple program could do much quicker for me. I've got it mostly done, I'm able to read from teh file just fine but I'm having trouble writing to the various files I want to...I think it has to do with the creation of the PrintWriter and the method ... |
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I need to be able to read and write text files to and from the following character sets: ASCII, ISO-8809-1, MacRoman, and UTF-8. I have developed the following code which works, but I don't know how to specify the character set. Will somebody tell me how to modify my code so that the Charset object that is used can be a ... |
I need to read and write from a java class which is inside Tomcat's webapps folder. (I have folder structure in my first post) I wrote teh servlet to get the context path, but not sure how to use it.. because I need to call this servlet from a class file not a web page. thanks, |
I would like to ask that, how to show "writing in a text file" on consoles ? i.e. if i am writing some content in a file say abc.txt using a java program, then while writing in a file, how can i show updated file contents on other console (ie. other than my currently running java program console). I want to ... |
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Below is the code for creating a new empty file called "raven.txt" I wanna add some Strings to the file from a String array with a tab between every two strings. can someone help me in this... Thanks in Advance... Regards, Ravindra. import java.io.*; public class textFileCreation { public textFileCreation() throws IOException { try { File temp = new File("raven.txt"); if ... |
hi, i want to write a form value into a text file, i have a simple class below, the value gets written to the page, no exception gets thrown either, just no information gets entered into the file, i have tried using just a normal text string and run the program from the cl and that works fine, but when i ... |
Can somebody please help me with this code? I have the program correctly coded and operating properly, however, I forget how to write my output to a text file. Can somebody please help me here? Thanks. /** * This program calculates the monthly Heat Index for a specific city. * * @author John D. Barry * @date January 30, 2009 */ ... |
Good morning, everybody. As you will see from the following code, I am writing my surface gravity data to a text file. However, I am wondering if I can use a static method to write this data to a text file and call it back in the main method. Can I do this, and if so, how would I go about ... |
package write; import java.util.*; import java.io.*; class Read{ private static Hashtable file = new Hashtable(); private static String path="g:\\write\\PICTURE.JPG"; private void reader()throws IOException { File f; f=new File("g:\\read\\PICTURE.JPG"); if(!f.exists()&& f.length()<0) System.out.println("The specified file is not exist"); else{ long file_size = f.length(); System.out.println("Size of the file : " + file_size); FileInputStream finp=new FileInputStream(f); byte b=(byte)finp.read(); int i=0; while(b!=-1) { file.put(i,b); //put ... |
Hi. I'm currently doing the SCJD and wish to learn as much as I can. Just wondering with the default serialization, is it possible to write an object and read objects to a flat file that contains records of these same objects or does serialization store additional detail? For example, is it possible to write objects using a randomaccessfile instead of ... |
Basically, this part of my program is like a text editor. You enter in a file name, it loads the file into a text area, you can make changes, and when you click save it writes the new text to the file. This is the code, /* Load the file into the text area */ try{ buffout = new BufferedReader(new FileReader(file)); ... |
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I'm running an application which writes info to a log file as it does it's thing in my application, i need to monitor the progress by actively reading and parsing this log file I tried using the lock mehod on nio file channel, each time locking a distinct part of the file which was already written, however when trying to actually ... |
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this is code of my recontruct button...i write my segment data in a file from this button. FileOutputStream fos = null; BufferedOutputStream bos = null; DataOutputStream dos = null; File file = new File("D:/A.txt"); System.out.println(file); try { fos = new FileOutputStream(file); // Here BufferedInputStream is added for fast reading. bos = new BufferedOutputStream(fos); dos = new DataOutputStream(bos); int len=0; String writesegment=""; ... |
Hello Everyone. I just learnt programming a year ago and I was given an assignment to write a class. One of the criteria of the program was: " write an instance method that reads string from text file and returns as a string to the program.." This is my code: import java.util.*; import java.io.*; public class FileController { private String fileName; ... |
I saved a large Microsoft Word document containing many accented characters, n-dashes, inverted commas, etc as HTML, and then using java code I converted it to XML, and split it up into smaller pieces. I then tried to write these pieces out to the filesystem as ISO-8859-1. Since the original MS Word document is CP1252 which is supposed to be a ... |
Hello, I want to write some invalid, invisible characters to a file so I can test my code. For example, I want to write characters in the range x80 - xFF to a text file. How can I do this? I want to be able to read the text with java and determine that they are characters in the range x80 ... |
hi , i am trying to add multiple DOMs to a xml File : TransformerFactory transformerFactory = TransformerFactory.newInstance(); Transformer transformer = transformerFactory.newTransformer(); DOMSource source = new DOMSource(document); // Prepare the output file Result result = new StreamResult(fileout); // Write the DOM document to the file Transformer xformer = TransformerFactory.newInstance().newTransformer(); xformer.transform(source, result); transformer.transform(source, result); but the result is everytime the last source ... |
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Student Name Bubble Sort, Read And Write From Text Files Hi all, I am new to the forums so I hope I am posting in the right spot. Here is my problem, I have a program due for school Tuesday and i have gotten pretty far but I am getting some errors and I have been jerking around for ... |
Are you using a Properties file or just a plain text file? I suggest using a plain text file as Properties files are generally used for known property keys, whereas your program has no prior knowledge of what the team names will be. As to your question, are you asking how to read the information from the file back into your ... |
public void writeFile() { String pathname = OUFileChooser.getFilename(); File aFile = new File(pathname); ObjectOutputStream outStream = null; try { FileWriter writer = new FileWriter(aFile); Iterator it = noDuplicates.iterator(); while (it.hasNext()) { writer.append(it.next().toString()); writer.append('\n'); System.out.println(noDuplicates.toString()); } } catch (Exception anException) { System.out.println("Error: " + anException); } finally { try { outStream.close(); } catch (Exception anException) { System.out.println("Error: " + anException); } } ... |
I am trying to create a text file with the file class on MacOSX. ( File fdata = new File("/data/data1.txt") ). The text file is created , except when I try to open it an error messaging saying the system was unable to open the file appears. Tried importing with a text editor but the text was garbled. What format should ... |
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saveFile.java:25: unreported exception java.io.IOException; must be caught or de clared to be thrown f.createNewFile(); ^ saveFile.java:27: unreported exception java.io.FileNotFoundException; must be ca ught or declared to be thrown FileOutputStream fop=new FileOutputStream(f); ^ saveFile.java:30: unreported exception java.io.IOException; must be caught or de clared to be thrown fop.write(str.getBytes()); ^ saveFile.java:32: unreported exception java.io.IOException; must be caught or de clared to be thrown fop.flush(); ... |
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import java.io.*; public class BoxKeeper{ public static void main(String[]args){ KeyboardReader reader = new KeyboardReader(); //My TerminalIO //doesn't work, so I //put the KeyboardReader class in the //same folder Box[] arrayOne = new Box[100]; //This is the array of Box objects int num=0; for(int a=0; a<100; a++){ arrayOne[a] = new Box(); num = reader.readInt("Enter the box number, or a negative to quit: ... |
Hi all, I'm dumping the values of a very large integer 2-dimensional array (tens of thousands by tens of thousands) into a text file. I'm trying to dump the values in a way so that the text file representation of it looks just like the arrays (i.e. a x by y grid of values). My array (let's use rows and columns) ... |
hello, i have got a method that reads the first three pages of a file and stores the contents in a buffer. BUT instead of storing the contents in a buffer I WANT to store them in a text file. can any one pls help........ code: ******************* public static String getFirstThreePagesText (File pdf) throws IOException { PDFTextStream stream = new PDFTextStream(pdf); ... |
Hi. I am new in Java, and I have got some problems trying to read and write text files. My problem actually is quite simple. With C++ you can move an ostream object in order to write bytes in whatever position within the file. For example, you can move the ostream object to write from the byte 45, instead from the ... |
Hello I have to read a file (.cvs file) then change a value of a field in it and save it again. Therefore, the read file and the write file is the same name. I use CVSParse for doing this Here is my code: private void updateClassName(String className, String fileName) throws IOException{ String[][] values=new String[0][0]; FileReader fileReader = new FileReader(fileName); BufferedReader ... |
40 million characters RUN #2: Free Memory: 98017592 Starting Chunk Writer Finished Chunk Writer. Elapsed Time: 1.127 Starting Pieces Writer Finished Pieces Writer. Elapsed Time: 2.581 40 million characters RUN #3: Free Memory: 98017592 Starting Chunk Writer Finished Chunk Writer. Elapsed Time: 1.14 Starting Pieces Writer Finished Pieces Writer. Elapsed Time: 2.538 |
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I have written a file writing programm through java its working but its settings(tab spacing and spaces) are get change as I open that file on different OS like Windows and Centos 5. So how to overcome that problem?so that I can get the well formatted file under any OS(platform)...... Please help me out..................... |
(4). String name = JOptionPane.showInputDialog("What is your name?"); It's better (IMHO) to delare variables "on the fly". Ergo: It is better (all other things being equal) to declare each variable when-and-where it is initialised. This also "mimimises the scope" of each variable, which helps to reduce the number of variables which are "in scope" at any place in the code, therefore ... |
CD Item : Item Title :ghjgjg Item Playing Time :65 Item Price : 654.0 Item Comments :hfjfj Artist : jhjh Tracks: 6 CD Item : Item Title :fsfsdfsdf Item Playing Time :43 Item Price : 5.0 Item Comments :gdfgdsg Artist : akuikui Tracks: 5 CD Item : Item Title :fsfsdfsdf Item Playing Time :43 Item Price : ... |
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I read the contents of the file and populate an ArrayList to get the segments I only need from the origninal file. Then I write the new String back to the file. The problem is, when it writes to the file, only the last row is inserted back into the file. BOF num5index5cycle5 EOF I wanted to see BOF num1index1cycle1 num2index2cycle2 ... |
You have a couple of problems but first and foremost you have a problem with variable scope. A variable is only visible from within the scope it was declared in. So a variable declared within a try block is only visible within that try block and doesn't exist outside of it. This problem can be solved by declaring variables that must ... |
filepath = "D:\\thesis\\Material\\data\\CriticalNetwork test3.txt"; File file = new File(filepath); FileReader fileread = new FileReader(file); BufferedReader bufread = new BufferedReader(fileread); this.read = null; // read text file and save each line content to arraylist while ((read = bufread.readLine()) != null ) { save.add(read); } // split each arraylist element by space and save it to String[] for(i=0; i< save.size();i++){ this.temp = save.get(i).split(" ... |
I know who to use the Scanner and PrintWriter to read from and write to a .txt file. But these are limited. How can I read and write at the same time? Such as open a file and change every third character or change every second word to something else and then write it back. I found this [http://java.sun.com/docs/books/tutorial/essential/io/|http://java.sun.com/docs/books/tutorial/essential/io/] but its ... |
Above is the paart of code i am using I want to print the text in bold in dos printer but it printer just in normal way. Can i save the test in some text file say (.doc or .pdf) in bold and then send this file to the port for printing. |
Hai toall, Can any one please tell me how to an interger value in a textfile. I could write a string into a file. But i am unable to write an integer value. i wrote like this in my program. public void writeToFile(int number) { int no; try { String f = "RecordCount.txt"; FileOutputStream fop = new FileOutputStream(f); no=number; fop.write(no); fop.flush(); ... |
Hi there, I figured out the code to read in all the html for a particular website. My ultimate goal is to extract numbers relating to stock prices so that I can create my own indexes. But all the html outputs to the prompt (I'm working in ecllipses basic development tool). I was thinking the best way to get the numbers ... |
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Hi folks, I am trying to write to a file called docAddresses.txt. Currently, its contents are being overwritten by the parameter (docLocation) being taken in by the method. I want to store what was in the text file previously and add the contents of the string to the end of the file. anyone help? public static void addURL(String docLocation) { try ... |
Your big mistake was opening the file from within your recursive routine. Don'do this. Instead open it before you call the recursive method and if using a FileWriter object, don't call the constructor with a true parameter. use false if you want to over-write the file. Also, be sure to close the file from within a finally block. |
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Hi, I am trying to write to a text file, but I need certain behavior that I'm not sure how to get. Look at the code below, it is fairly simple and straight forward. FileOutputStream FOStream = null; PrintStream POStream = null; try { FOStream = new FileOutputStream("text.txt"); POStream = new PrintStream(FOStream); for (int i=10; i<20; i++){ POStream.print("hello" + i +"\r\n"); ... |
Hi Dear Actually apending in your file is False so that it is overwriting this. do one thing open append option then it will add your data. for this just user true as the parameter with file name as i write in the below line. bedefault overwriting is false. you have to make this true. BufferedWriter out = new BufferedWriter(new FileWriter("Out.csv",true)); ... |
I need to write last 10 lines of a text file to a web page. I could write the entire file using following code...but how to write last x lines????? import java.io.*; public class ReadWriteTextFile { /** * Fetch the entire contents of a text file, and return it in a String. * This style of implementation does not throw Exceptions ... |
public class customerRecs extends handlefile{ public static void main(String arg []){ String strmenu=JOptionPane.showInputDialog(null,"If you want to enter data press 1 otherwise press 2 "); int menu=Integer.parseInt(strmenu); handlefile choicemenu=new handlefile(); if (menu==1){ choicemenu.write(); } else if(menu==2){ choicemenu.read(); } else{ strmenu=JOptionPane.showInputDialog(null,"Wrong entry!!! If you want to enter data press 1 otherwise press 2 "); menu=Integer.parseInt(strmenu); if (menu==1){ choicemenu.write(); } else if(menu==2){ handlefile rd=new ... |
hi, I met a problem when I try to store data to text file. That's the description: - To read some objects from the binary file - To update object state, do some operations - To output some properties of the object to text format file. That's a part of my code: //------ begin ---------// // ".cluto" is a binary file ... |
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Hi All, I retrieved the Chinese character from DB (which is UTF-8 encoding) and write the text to target file in server by FTP. I tried it in Windows, and success to read Chinese character from target file. However, I moved and run it in Linux platform, I cannot read the character which is replaced by '???'. I known that when ... |
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i am creating an Applet game and I would like to create Rankings. So, i need to take data from java and transfer them into HTML. At my university's book says that everytime we open a file to write in it, if there are already data, Java removes them and then writes the new ones. But I want a static file ... |
i am writing a Java application which takes user input and writes into a file. i need certain text to be written into the file in bold, italics etc. I have used the BufferedWriter class and the obj.write() method to write into the file. i am unable to find out how to format the text that gets written. Can someone help ... |
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You're using getCodeBase() to construct the file name, apparently, so I guess you are wanting to write to a file on the server where the applet was loaded from. And it looks like you're trying to do a POST to the URL that you construct, or something like that. But the URL ends in ".txt" so most likely your server isn't ... |
Don't use \n for a line terminator. It's not the proper line terminator on Windows or Mac. You could use printf, in which case \n will properly get translated to the appropriate line terminator for your platform. Or you could append the result of System.getProperty("line.separator"). Or you could use BuferedWriter's newline() method. (I think it's there--check to see if it really ... |