Latest Tutorials| Questions and Answers|Ask Questions?|Site Map



Home Answers Viewqa Java-Beginners Reading and writting multiple files

Have Programming Question? Ask it here!
 
 
 


alain ndayishimiye
Reading and writting multiple files
2 Answer(s)      2 years and 6 months ago
Posted in : Java Beginners


how can i read and write say two different files at the same time using threads.


Advertisement
View Answers

January 19, 2012 at 5:41 PM


import java.io.*;
class ReadFileUsingThread
{
    public void readFromFile(final String f, Thread thread) {
    Runnable readRun = new Runnable() {
      public void run() {
        BufferedWriter pw=null;
        FileInputStream in=null;
        String text = null;
        try{
            pw = new BufferedWriter(new FileWriter("C:/New/"+new File(f).getName()));
          Thread.sleep(5000);
          File inputFile = new File(f);
          in = new FileInputStream(inputFile);
          byte bt[] =  new byte[(int)inputFile.length()];
          in.read(bt);
          text = new String(bt);
          pw.write(text);
          pw.newLine();
          pw.close();
       } catch(Exception ex) {
       }  
      }
    };
    thread = new Thread(readRun);
    thread.start();
  }

    public static void main(String[] args) 
    {
        ReadFileUsingThread f=new ReadFileUsingThread();

        File file = new File("C:/Files/");
         FilenameFilter filter = new FileFilter();
        File[] files = file.listFiles(filter);
        Thread thread[]=new Thread[files.length];
        for(int i = 0; i < files.length; i++) {
           thread[i]=new Thread();
        f.readFromFile(files[i].getPath(),thread[i]);
        }
    }
}
class FileFilter implements FilenameFilter {
        public boolean accept(File dir, String name) {
                return name.endsWith("txt");
        }
 }


January 20, 2012 at 12:33 PM


i did you example but it crashes with big file how come. i get this error

:Thread-1" java.lang.OutOfMemoryError: Java heap space



Related Tutorials/Questions & Answers:
Reading and writting multiple files
Reading and writting multiple files  how can i read and write say two different files at the same time using threads
Reading multiple xml files
Reading multiple xml files  How can we read many xml files from a folder? The same procedure as that of "listfiles
Advertisements
reading multiple files from a directory and writing them into a single file
reading multiple files from a directory and writing them into a single file... this: /*this program reads multiple files * from a single directory. */ package elite.tech.com... File(inpath); File files[]; files = Folder.listFiles
Reading files in Java
Reading files in Java  I have to make a program in my project.... Please provide me the example code for reading big text file in Java. What do you suggest for Reading files in Java? Thanks
Reading and Writing files - Java Beginners
Reading and Writing files  Hello, please help me to Develop a simple Java application that, when run, Welcomes the users and tells them the name... to investigate writing to files a little (can be also done using Properties
Reading Files and Print - Java Beginners
Reading Files and Print  Hey Guys, I'm a beginner to java and I wanna write this program. I wanna create files including information.... There are almost 30 files. When I want to find students whose school is "School
Renaming multiple files
Renaming multiple files  Hi, I have number of files in a directory. Files are named as: 1DeoyaRohit0705$.mp4,2DeoyaRohit0705$.mp4, 3_DeoyaRohit0705$.mp4. .... Now I wanted to rename these files as: 1RohitBBorse.mp4
Upload and Download multiple files
Upload and Download multiple files  Hello Sir/Madam, I need a simple code for upload and download multiple files(it may be image,doc and txt)which has to be store in database and also retrieve the file from database
Dynamic include of multiple files
Dynamic include of multiple files  I want to include a series of small files, based on a string. For instance, if the string was: String fileString="a b c d e"; I would split it into an array, fileArray, and do something like
Merging multiple PDF files - Framework
Merging multiple PDF files  I m using the iText package to merge pdf files. Its working fine but on each corner of the merged filep there is some... the files are having different font.Please help
Uploading Multiple Files Using Jsp
Uploading Multiple Files Using Jsp  ... to understand how you can upload multiple files by using the Jsp. We should avoid... a file. In this example we are going to tell you how we can upload multiple files
save output in multiple text files
save output in multiple text files  Hi..I'm getting problem to store the output of this php code into multiple text files. Can anyone sugeest. Here is my code: <?php for($i=1; $i<=100; $i++) { $html = file_get
Java read multiple files
Java read multiple files In this section you will learn how to read the data of multiple files. Here we have created four files that includes information.... We have to find the students according to particular school from all the files
Uploading the multiple files
. For uploading the multiple files at a time, first create a table as per required...; <HTML> <HEAD> <TITLE> Multiple Files Upload </TITLE>...="#FFFFFF"> <tr> <td><strong>Multiple Files
Copy multiple files
Copy multiple files        In this section, you will learn how the data of multiple files.... For copping the data of multiple file, you need all files in a specified directory where
retrieve multiple columns values from multiple csv files in java
retrieve multiple columns values from multiple csv files in java  Suppose there is folder in C:\fileupload which contains these two csv files... these two files and store in oracle database as: VendorID,Name,Address and plz
Source file upload by attaching multiple files
a provision to attach multiple images/files like in gmail. Is there any solution...Source file upload by attaching multiple files  Thanks for the answer. The answer posted in this link I want to have a single text box and when i
Source file upload by attaching multiple files
Source file upload by attaching multiple files  Hi, I am trying to develop a file upload with multiple files attached functionality in java(like in gmail or in picasa). The source I found so far will select a single file. When I
Reading from remote files using PHP,Ubuntu and Windows machine.
Reading from remote files using PHP,Ubuntu and Windows machine.  Hi, Great work you doing here and I totally love the look and feel of the new site... on a windows machine within the same network. After reading from it, the script
Uploading multiple files in JSP - JSP-Servlet
Uploading multiple files in JSP  Hi, I have this code in JSP for Uploading multiple files : Samples : Simple Upload... modification I need to do in the code to upload all the files attached. 
How to convert multiple files in java to .zip format
How to convert multiple files in java to .zip format  i receive multiple files from a remote URL as for (String reportid : reportList...://Answers//Examples"); File[] files = folder.listFiles(); File file=new File
help me plz:-Merge multiple jasper files into Single one
help me plz:-Merge multiple jasper files into Single one  how to Merge multiple jasper files into Single one word doc
find jar file name from multiple set of jar files
find jar file name from multiple set of jar files   I would like to find jar file name from multiple set of jar files where the given class name√Ę‚?¨¬?com.rational.ft.util.debug√Ę‚?¨¬
how to upload multiple files in jsp and saving the path in database and the file in folder
how to upload multiple files in jsp and saving the path in database and the file in folder  how to upload multiple files in jsp and saving the path in database and the file in folder I have created a form for the upload of files
java program to read multiple files from a directory and display them on a jframe
java program to read multiple files from a directory and display them on a jframe  hi guys i want to write a java program that will read all files in a directory and display them one by on on a jframe on jpanel with specific key
Uploading Multiple Files Using Jsp
Uploading Multiple Files Using Jsp  ... to understand how you can upload multiple files by using the Jsp. We should avoid... a file. In this example we are going to tell you how we can upload multiple files
Multiple files upload code using spring mvc 2.0 with xml configuration without using annotations
Multiple files upload code using spring mvc 2.0 with xml configuration without using annotations  how to write code to attach multiple files and upload using spring mvc 2.o with xml configuration with out annotations? please
for writting java program why we are taking more than one class
for writting java program why we are taking more than one class  for writting java program only one class is enough but why we are taking more than one class
Why we are writting public static void main(String args[])?
Why we are writting public static void main(String args[])?  Why we are writting public static void main(String args[])? please elaborate it... and also explain the statement System.out.println("abc
files
/core/files/storeobjectsinFile.html
files
files  write a java program to calculate the time taken to read a given number of files. file names should be given at command line.   Hello Friend, Try the following code: import java.io.*; import java.util.*; class
Reading Text file and storing in map
Reading Text file and storing in map  Hi I have multiple text files. I want to read thoses files and store those records in map. Map will be of "LinkedHashMap<String, Map<String, String>>" type. Please let me know
how to read the values for text and csv files and store those values into database in multiple rows..means one value for one row
how to read the values for text and csv files and store those values into database in multiple rows..means one value for one row  Hai, I need... table in multiple rows(which means one value for one row). eg: my file containes
need help for writting code in struts action class for check boxes and radio buttons - Struts
need help for writting code in struts action class for check boxes and radio buttons  Hello frnds, i need help from u esteemed and talented people.iwould like to write code in struts action class for check boxes and radio
svg file reading and display
svg file reading and display  i want a sample program for reading and displaying the content of a svg file
Reading a text file in java
Reading a text file in java  What is the code for Reading a text file... in java.io.* package for reading and writing to a file in Java. To learn more about reading text file in Java see the tutorial Read File in Java. Thanks
Thread for reading txt file
Thread for reading txt file  how to use 3 thread to read 3 txt file? To create three threads for reading the file and three threads for getting the strings out of the queue and printing them. thanks
uploading and reading the excel daa
uploading and reading the excel daa  uploading the excel file not getting the data of the excel
Reading big file in Java
Reading big file in Java  How to read a big text file in Java program?   Hi, Read the complete tutorial at How to read big file line by line in java? Thanks
Reading Value From console
Reading Value From console  In case of String data Type readLine method of DataInputStream class read complete line of the given string but the next method of Scanner class doesn't read the complete line of String. why
Reading Value From console
Reading Value From console  In case of String data Type readLine method of DataInputStream class read complete line of the given string but the next method of Scanner class doesn't read the complete line of String. why
Reading an excel file into array
Reading an excel file into array  Hi, I'm trying to read in an excel file, search a column for containing key words (entered by a user) and then displaying the matching rows in a table. I'm fairly new to JavaScript. Can anyone
Problem reading word file
Problem reading word file  Deepak you provide me code for extarcting equation from a word file and also to write in a word file.But when I again want to read preveously created word file(created by your code) it gives an error
Writing and Reading A File
Writing and Reading A File  Hello, I've been trying to learn writing and reading data from file for our assignment, but just stuck on how to proceed...: http://www.roseindia.net/tutorial/java/core/files/insertfiledataToJTable.html
Reading excel via JSP
Reading excel via JSP   The problem is while reading cells values... the space between words and get full cell value? I am reading the value...(means while reading the cell values space should be ignored between the words
Reading a big file effeciently
Reading a big file effeciently  How to read a large text file quickly without memory error in Java? What is the best method to read a big file very efficiently? Thanks   Hi, Kindly check the program Java Read File
web page reading in java
web page reading in java  i wanna read webpage in that i want to get the data from the particular tags like (,) and store into the data base...... can any body tell me the solution? plz urgnt. thanks and regards, jasti  
Reading cookies in jsp
Reading cookies in jsp   How read cookies in jsp ?   Creates a cookie, a small amount of information sent by a servlet to a Web browser, saved by the browser, and later sent back to the server. A cookie's value can
Reading file into bytearrayoutputstream
input stream and byte output stream. This is and good example of reading file... we have used the class InputStream for reading the file content into byte...*; /** * Example of Reading file into byte array and then write byte array into a file
External file reading in jsp
External file reading in jsp  i have written a jsp page(ReadExt.jsp) in my application which reads a text file content from a system .. but this ReadExt.jsp page is not working in other system when i open that application
 

 

 

DMCA.com