Reader « API « Java I/O Q&A

Home
Java I/O Q&A
1.API
2.batch File
3.binary File
4.class file
5.CSV file
6.deploy
7.Development
8.directory
9.error
10.Excel File
11.File Attribute
12.jar
13.Log
14.Media File
15.nio
16.Operation
17.PDF file
18.PropertyFile
19.serialize
20.text file
21.Windows
22.XML file
23.Zip
Java I/O Q&A » API » Reader 

1. InputStream or Reader wrapper for progress reporting    stackoverflow.com

So, I'm feeding file data to an API that takes a Reader, and I'd like a way to report progress. It seems like it should be straightforward to write a FilterInputStream implementation ...

2. Efficient way of handling file pointers in Java? (Using BufferedReader with file pointer)    stackoverflow.com

I have a log file which gets updated every second. I need to read the log file periodically, and once I do a read, I need to store the file ...

3. What is the difference between a stream and a reader in Java?    stackoverflow.com

Today I got this question for which I think I answered very bad. I said stream is a data that flows and reader is a technique where we read from that ...

4. Open InputStream as Reader    stackoverflow.com

Can I easily convert InputStream to BufferedReader using Guava? I'm looking for something like:

InputStream inputStream = ...;
BufferedReader br = Streams.newBufferedReader(inputStream);
I can open files using the Files.newReader(File file, Charset charset). That's cool and ...

5. How do I avoid closing an InputStream passed to my method that I wrap in Reader streams?    stackoverflow.com

I'm creating a Java method that accepts a single InputStream as an argument. For the convenience of working with a character-based stream, I wrap the provided InputStream at the start ...

6. Creating a custom reader class in java    stackoverflow.com

I am try to solve a prob in one of the Programming contests.The actual prob is sort a given list of numbers.I am using a algorithm with complexity(nlog n) and that ...

7. Do I need to close InputStream after I close the Reader    stackoverflow.com

I was wondering, whether is there any need for me to close the InputStream, after I close the reader?

    try {
        ...

8. Close Reader, Make Input Stream Remained Opened    stackoverflow.com

Currently, I have a method :

void method(InputStream stream) {
    // Create UTF-8 reader by wrapping up the stream.
}
The reason I do not want to have method to accept ...

9. Java: What sense could it make not to close an InputStream after it ended?    stackoverflow.com

InputStream implements Closeable. I understand, that closing an InputStream which not ended yet, could make sense to free some underlying resources, and, leaving it open, could make sense to let other methods ...

10. Problem with buffered File Reader    stackoverflow.com

I have been asked to write a file reader method, I have done one which works fine but cant get the 2nd one to work and keep getting this error after ...

11. What is the difference between Reader and InputStream?    stackoverflow.com

What is the difference between Reader and InputStream? And when to use what? If I can use Reader for reading characters why I will use inputstream, I guess to read objects?

12. Closing nested Reader    stackoverflow.com

When reading from a text file, one typically creates a FileReader and then nests that in a BufferedReader. Which of the two readers should I close when I'm done reading? Does ...

13. How to read and update row in file with Java    stackoverflow.com

currently i creating a java apps and no database required that why i using text file to make it the structure of file is like this

unique6id username identitynumber point

unique6id username identitynumber point
may i ...

14. inputstream and reader in Java IO    stackoverflow.com

The difference between inputstream and reader is inputsteam reads as byte, and reader reads as character. for example in a file, the text is "abc",then both of them work fine. But if ...

15. Do I need to close a Reader decorator of the java.io package?    stackoverflow.com

I need to parse an object and I need to wrap the Reader I receive into a PushbackReader. Do I need to close the PushbackReader in any case or is it ...

16. Why is java.io.Reader#skip implemented the way that it is?    stackoverflow.com

I'm still learning object-oriented programming in Java. I was looking at the Java implementation of java.io.Reader.skip and I'm wondering why exactly it's implemented the way that it is. In particular I ...

17. JNotify and File Reader conflicting each other    stackoverflow.com

I implemented JNotify to determine when a new file arrives in a particular directory, and, when a file arrives, to send the filename over to another function, as follows:

   ...

18. A java.io.Reader class that can skip HTML tags?    stackoverflow.com

I need to strip HTML out of large volumes of text. It would be cool if I could find a class that implements java.io.Reader that would wrap another Reader, and transform ...

19. Construct BufferedReader with BufferedReader as reader    stackoverflow.com

Can I do this subj? I mean:

 BufferedReader reader1 = new BufferedReader(new FileReader(new File("file")));
 BufferedReader reader2 = new BufferedReader(reader1);
What will happen if I'll try to use BufferedReader (second one) in this ...

20. how can i incorporate my reader file to my program    bytes.com

Do you want to reload the file every time for the check, or just read the thing once? Right now all you have are miscellaneous code bits that sort of solve ...

21. Extending a Reader    coderanch.com

I want to write my own FilterReader/ Writer to convert a text file to be XML safe. In other words there are certain characters I will need to convert to entities, "<" type thingies, so that they won't trip the parser. If I extend a Reader and Writer, perhaps BufferedReader/ Writer, what do I need what do I definitely need to ...

22. about Reader and FilterReader    coderanch.com

23. reader vs stream    coderanch.com

Hello, does a "Reader" read 1 byte at a time? I tought since a reader is intended to be used for characters it would read 1 unicode (16 bit) char at a time, but when I wrote: stream.writeByte((byte)69); stream.writeChars("ABC"); to a file using a stream then read the same file using a reader I got: System.out.println((char)br.read()); // prints E System.out.println((char)br.read()); // ...

24. File Reader(Urgent)    coderanch.com

25. Buffered File Reader    coderanch.com

I'm trying to read some data from a text file, and I'm using JBuilder 7... It's giving me File Not Found Exceptions no matter where I put the file that I can think of... is there some specific place that anyone knows of that I should have stored this text file so that my IDE can find it? Thanks.

26. File Reader    coderanch.com

I managed to get the stuff from my TextArea into a text file now I would like to open the same file using the FileReader and load it into the TextArea. Yet when I try I get a compilation error. Incompatible types. The complete code is below and it happens in the Open class What is it I am doing wrong ...

27. Using and reusing buffered stream reader.    coderanch.com

I have created one class to open an input stream then feed this into a buffered reader. The class has two methods. readString() which use readLine() and the second readChar which uses read(). In my main body I use readString() method and it is fine. Then I use readChar() and it appears to already have input. Being new to this am ...

28. File Reader    coderanch.com

29. Number of bytes read from a Reader    coderanch.com

Hello, I'm interested in reading chars from a (Buffered)Reader. However, I'd like to know how much I've read in terms of bytes and not chars. I understand that the size of a char in bytes varies depending upon the charset... Is this something I'd have to compute given the char set? Or is there a way to retrieve this information from ...

30. NPE when wrapping a Reader in a BufferedReader twice    coderanch.com

In the following code, when i pass the Reader to the method a second time, the program fails with a NullPointerException. package tests; import java.io.BufferedReader; import java.io.IOException; import java.io.Reader; import java.io.StringReader; public class BuffReadTest { public static void main(String[] args) { String testString = "This\nis\na\ntest.\nend\nHow\nwill\nit\nwork?\nend\n"; String terminator = "end"; try { Reader reader = new StringReader(testString); try { readAndPrint(reader, terminator); readAndPrint(reader, ...

31. Limit character read using Reader?    coderanch.com

Hi I have to read a Clob from oracle, and using Reader API to read. I want to limit amount of character to read because some of them are huge, and when it render to the browser it stop .The following code that I have is read the whole thing, How do i set the limit of character on this Many ...

32. Stream Reader    coderanch.com

Hi, What is the difference between the InputStream,OutputStream and InputStreamReader,OutputStreamWriter and DataInputStream,DataOutputStream .I wentt through the API doc but did not get DataInputStream( (confused with them) Suppose i a text file exist with text "My Name is 123 phillipe" So in what situations can i use the above io classes. Please help

33. difference between reader and stream    coderanch.com

Or more generally: Readers and Writers work with character data and have a notion of a character encoding. The bytes in a file may not match exactly what you get back from a Reader, depending on the active character encoding. If you're working with non-ASCII text, you need to use these or you'll get wrong answers. Streams, on the other hand, ...

35. barcode reader    coderanch.com

37. Java integration with RFID card reader.    coderanch.com

38. problem with file reader    java-forums.org

Hey guys, I have a question regarding FileReader and FileWriter. Before I ask my question I'd like to give you some details regarding what I'm trying to do. a simple project to keep myself busy. I am trying to write a cross-platform RSS feed reader in Java. It basically reads the complete source of a web page, and uses regex and ...

39. java file reader, jgrasp can't find the file    java-forums.org

Hi guys, i have the following code to read a file, everything is fine and the code compiles, but it cannot find the file to read it. I'm using j-grasp and both the file and program are saved in the same folder. the code is: import java.util.Scanner; public class Project8 { public static void main(String[]args) throws Exception { java.io.File file = ...

40. File Reader with multiple files    java-forums.org

Currently I am trying to program a simple Artificial Intelligence by using a series of text files for the user name login, and the questions being asked. Currently, I am trying to set it so you can only pick one of four questions via a drop down menu in the Java GUI builder. I want it so I only have to ...

41. why does java.io.Reader.read() outputs a int, not char?    java-forums.org

I'm certainly no pro at this, but couldn't he wrap his InputStreamReader with a BufferedReader and then call readLine on it to read in a line of text, or null if end of input has occurred? This way no casting is necessary, and since the reader is buffered, there's a potential gain in efficiency.

42. Trouble with Java File Reader    java-forums.org

Hi, I am creating a program that would read a text file and display its contents for an assignment. I have made a code, but I have two issues with it. Firstly, I am getting two errors that say I am missing 2 '}' (I shall post an image of the errors). Secondly, the topic of reading data from another file ...

43. File I/O reader in web    forums.oracle.com

44. file reader command line app not working    forums.oracle.com

Let's just say that this thread is no more. It has ceased to be. It has expired and gone to meet 'is maker. It's a stiff. Bereft of life, it's rests in peace. If you hadn't responded to it, it'd be pushing up the daisies. Its metabolic processes are now 'istory. It's kicked the bucket, it's shuffled off its mortal coil, ...

45. Exception in File Reading using Reader    forums.oracle.com

I want to read file from Desktop, and file name is A.txt. I am using Linux, my program is as follow, but it gives "Exception in thread "main" java.io.FileNotFoundException: ~/Desktop/Example.txt (No such file or directory)"!!!!!!!!!!!!!!!!! // public static void main(String[] args) throws IOException { String a = "~/Desktop/Example.txt"; Reader in = new InputStreamReader(new FileInputStream(a)); } // Can someone help please, how ...

46. Exception in File Reading using Reader    forums.oracle.com

I want to read file from Desktop, and file name is A.txt. I am using Linux, my program is as follow, but it gives "Exception in thread "main" java.io.FileNotFoundException: ~/Desktop/A.txt (No such file or directory)"!!!!!!!!!!!!!!!!! // public static void main(String[] args) throws IOException { String a = "~/Desktop/A.txt"; Reader in = new InputStreamReader(new FileInputStream(a)); } // Can someone help please, how ...

47. Implement a File/Folder reader and generate a report with all statistics    forums.oracle.com

File myFile = new File("FileFolderReader.java"); if(myFile.exists()) { System.out.println(myFile.getPath() + " [" + (myFile.isDirectory() ? " D" : "") + (myFile.canRead() ? " R" : "") + (myFile.canWrite() ? " W" : "") + " ] " + myFile.length() + " bytes last modified: " + (new Date(myFile.lastModified()))); if(myFile.isDirectory()) { String[] list = myFile.list(); if (list != null) for(int c = 0; ...

48. file reader    forums.oracle.com

public class cookieImport { public static void main ( String [] args) { String filename = "Stuff.txt"; InputStreamReader bytesToChar = new InputStreamReader (System.in); int int1 =0; int column=0; String myRecord; bytesToChar=new FileReader(filename); BufferedReader inputFile = new BufferedReader(bytesToChar); myRecord=bytesToChar.read(filename); } } when compiling I get this error cannot resolve symbol symbol : method read (java.lang.String) location: class java.io.InputStreamReader myRecord=bytesToChar.read(filename); i am new ...

49. Regarding to file reader    forums.oracle.com

1) Don't catch exceptions silently. 2) Don't use an array unless you're absolutely certain that you'll know the number of lines in the file in advance. Use an ArrayList, as you have been told on the other thread you created about this. 3) When you have problems, actually read the error messages. Don't just throw your hands up in the air ...

50. Java txt file Reader    forums.oracle.com

Hello, this could be a newbie question but I am trying to read from a txt file using Scanner. the txt file contains data separated by commas, ssuch as: 2006, dodge caravan, MDKINU539JJ583, 2 owners the nextInt() gets an error because the 2006, contains a comma, so it takes it as a string. What would be the best way to do ...

51. Should I ask for a BufferedReader or just a Reader?    forums.oracle.com

You only write the method once, but presumably it will be used multiple times. So avoiding the boilerplate of instantiating a new BufferedReader to use the method, is a good thing. So exampleB or the overloaded versions are preferable. And the fact that the method requires a BufferedReader is really more of an implementation detail, one that might change. So I'd ...

52. file reader question    forums.oracle.com

The programming was somewhat sloppy in having two try-catch statements. however I accomplished my goal of writing a program that read from a file and proved it by writing it to the console window. Being that any one failure will result in total failure of the program to ultimately write to the line necesitates only having one try-catch block. I like ...

53. file reader    forums.oracle.com

54. Need help with file reader    forums.oracle.com

thats it. Any help would be greatly appreciated. so far i have this import java.io.File; import java.util.Arrays; public class DirectoryTestMain { public static void main(String[] args) { // create a file that is really a directory File aDirectory = new File("C://"); // get a listing of all files in the directory String[] filesInDir = aDirectory.list(); // sort the list of files ...

55. Help with the File Reader code    forums.oracle.com

56. Reader to InputStream    forums.oracle.com

57. EDGAR file reader    forums.oracle.com

Hi there, I'm looking to write/find a reader/converter that will take SEC filings and store them in a database. I've tried to look for information on open source code but come up empty handed. Is anyone aware of something like this. If not I have the other possibility of taking the full file and then converting and placing it into a ...

58. File Viewer and File Reader    forums.oracle.com

I have a program that is supposed to both read and write from a file. I get an error when i tried to write to the file. This is where the error occurs. FileWriter writer = null; try { writer = new FileWriter(filename); textfield.write(writer); } symbol : method write(java.io.FileWriter) location: class java.awt.TextField textfield.write(writer); Note: C:\Documents and Settings\chris.mrozinski\My Documents\NetBeansProjects\FileViewer\src\fileviewer\FileViewer.java uses or overrides ...

59. What's the fastest input stream reader?    forums.oracle.com

I do have a separate function that's optimized for file reading. I have tried the simpler implementation, and it is slower. The reason I'm reading into a StringBuffer is that I have a DOM framework that allows you to load an xhtml document, do stuff, and then print out the result. I have Styles which allow you to merging a document ...

60. file reader and comparing words    forums.oracle.com

static boolean hasmatch; //if this is set to true in the main method, there are happy words in the text static int happywords_num; public arrays() { hasmatch = false; happywords_num = 0; // TODO Auto-generated constructor stub } /** * @param args * @throws IOException */ public static void main(String[] args) throws IOException { try { String[] array = new String[] ...

61. file reader nearly there (i think!)    forums.oracle.com

Basically i wanna read data in from a text file then print some of the data to another txt file. i have a text file full of random data with html tags embedded somewhere within. I want my program to read the text file and only print the html within it to a second file. I have looked around the web ...

62. file reader follow-up help    forums.oracle.com

63. Differences between Stream and Reader    forums.oracle.com

64. Problem with java.io.Reader    forums.oracle.com

The eclipse environment i am using indicates that the reader.close() statement is wrong and marks the "close" method writing Syntax error on token "close";Identifier expected after this token I really dont know the cause of this problem because the it was taken directly from a help file in the jahmm library (http://www.run.montefiore.ulg.ac.be/~francois/software/jahmm/) i am using. I have added this library at ...

65. java newbie..problem with file reader    forums.oracle.com

What if the start string and end string are not on the same line? I've looked through the file and the start string and end string are ALWAYS on the same line...the only thing between the start and end string is a stock symbol. Just for argument's sake, even if the start and end strings arent on ...

66. InputStream and Reader    forums.oracle.com

For the program that I'm writing, I'm redirecting the default streams, so I made extended InputStream, overrode ALL the functions, and used System.setIn. However, a common class that I use for IO in my previous console programs use Readers. I figured out that I needed to return a (char) -1 after my buffer has ended as the end-of-stream. However, if I ...

67. Optimal File Reader??    forums.oracle.com

} catch (FileNotFoundException ex) { System.out.println("Cannot find specified file..."); ex.printStackTrace(); } catch (IOException ex) { ex.printStackTrace(); } finally { try { if (input!= null) { //flush and close both "input" and its underlying FileReader input.close(); } } catch (IOException ex) { ex.printStackTrace(); } } return buffer.toString(); } but i have now seen the following which claims to be very fast: tatic ...

68. Java IO File Reader Question....    forums.oracle.com

I had been looking for the code button which now seems to be gone.... but will now use the code tags as you suggest thanks... And yes you are more or less correct I was given this class and method and asked to: " Please list your observations about this class, including bugs, poor programming, inefficiencies, etc..." And wrote an alternative ...

java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.