I/O / Streams :: Java Streaming Big String
Aug 27, 2014
I have a very big string that I am returning from servlet to javascript. I am using PrintWriter.
PrintWriter out = response.getWriter();
out.print(bigString);
But as the string is very big my code is not working. My browser just hangs.
Also is it possible to stream the output? i.e instead of sending entire string, can I send small part of string at a time. So that my browser will not hang. I don't want to handle streaming manually I am just looking for an IO class which will do the streaming automatically.
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Dec 16, 2006
i want to know when i have to use Flush in java , i saw alot of code that used it IO streaming , but i cannt understand how can i use it , or when i have to use it
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May 20, 2014
I am working on a Java Streaming Networking ( Client Serve ) project , among remote client can:
1 ) chat,
2 ) Share files,
3 ) Share Screen live streaming,
4 ) Access the remote system.
All are working well faster & live on networking. But if i host on the Hosting server the all process are working but in deadly slow streaming is not live..,
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Mar 11, 2015
I am doing project on Video streaming using java.
How to convert video file into RTP packets....?
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Apr 18, 2014
I worked on this simple client server chat app and it worked now for my project i needed to work on client server audio streaming broadcast but i dont really know much bout audio api and methods on java...
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May 5, 2014
My requirement is to find the line number using multiline string. Here I need to extract the string between FROM and where clause(from the below string) and need to find the line number in the file
SELECT HL.LOCATION_ID,HPS.PARTY_SITE_ID,HCAS.CUST_ACCT_SITE_ID
INTO LN_SITE_LOCATION_ID,LN_LOC_PARTY_SITE_ID,LN_CUST_ACCT_SITE_ID
FROM HZ_LOCATIONS HL,
HZ_PARTY_SITES HPS,
[Code]....
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Apr 16, 2015
I want to make a service like Spotify, where I can stream music that I have stored on my computer (in this case server) to my laptop or phone.
* What would be a suitable format for this?
* How would I actually stream it? I want to stream, not download and then play, I want to play the music while downloading.
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Sep 17, 2014
I have a code below that is reading large image size and writing them to file however the process is too slow. how can i refine this code in such a way that it will work faster?
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.HttpURLConnection;
[code]....
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Sep 17, 2014
I have a code below that is reading large image size and writing them to file however the process is too slow. how can i refine this code in such a way that it will work faster?
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.HttpURLConnection;
[code]...
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Feb 18, 2015
I've been experiencing problems with the JMF extension when used in an Applet on the web. The program has worked fine previously but not returns the following error...
PackageManager: error reading registry
javax.media.NoPlayerException: Cannot find a Player for : [filename]
at javax.media.Manager.createPlayerForContent(Manager .java:1412)
at javax.media.Manager.createPlayer(Manager.java:417)
[Code] .....
However the program works fine in Eclipse with no errors. I have tried reinstalling the JMF package and setting the CLASSPATH and JMFHOME but it still does not work. I am using the jmf-2_1_1e-alljava version. I have also tried putting the player code in an AccessController.doPrivileged() block but this still does not seem to work.
My code for the player is as follows....
private void play(final String track) {
Thread dispatch = new Thread() {
public void run() {
try {
if(player!=null)
player.close();
[Code] .....
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Jan 27, 2012
I have to be able to read files that have been serialized in VB. 2 things, 1 they are serialized in Binary, and I tried to look up on how to serialize/deserialize in Binary, but didn't have much support...
Also in the VB code they talk about "TYPES" which seems to be to just be a class full of stuff...
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Oct 14, 2014
I am developing a program that reads a digital certificate in a USB token, but can not cause the program to access the token.
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Oct 30, 2014
I will detailedly explain my requirement below,. I am going to automate a manual process. I will be reading multiple CSV files from a remote location using java.There are five formats of input files are expected, each differs in their header structure. For example, Type 1 - Number, ID, Name, Phone, Address...Type 2 - Number, GID, Employee Name, Address1, Address2, Phone number and so the other three types are also differs.
The precondition is not all the files are expected for a particular run. I need to read these files one by one, validate it, log the validation error and i have to consolidate all the correct data from all the files together in a standard output format, in a single file The standard output format will be like,Number, Name, ID, Address
I need to have the above data alone in the output file and rest of the data can be ignored.What i have tried is as follows, I have created 5 bean classes representing each type's header. I just read an input, identify its type and parsed it. I parsed line by line.
public String[] parseCSV(String inputLine){
try {
String[] fields;
Pattern p =
Pattern.compile(",(?=([^"]*"[^"]*")*(?![^"]*"))");
fields = p.split(inputLine);
/*for ( int i = 0; i < fields.length; i++ ) {
System.out.println(fields[i]);
}*/
[code]...
I have validated as per the validation rules and i appended each line elements into an object. I have added all the objects in to a MAP collection. Likewise, i have created 5 beans and did the same.But, what is the change needed now is,. All the headers in all the five types of rosters are configurable items. hence, i have to change my bean classes everytime when the header structures are changed.
We have to create one single utility, which is configurable for all the five types of input files. To be very clear, if type 1 input comes with 8 columns and type 3 comes with 12 columns, the utility is able to parse it.
We are going to have a table which has the data regarding the header structure of all the five types of inputs alone. Once i read a file and identify its type, i will hit the database and read the header structure of that particular type and its column count. I will match the column count with the input file's header count and i will have to proceed creating a bean class on runtime depending upon the header structure read now. I will validate and consolidate as i did above. The requirement is, Runtime configuration of bean class, depending upon the type of input.
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Dec 26, 2013
I am developing some application in Java. The need is to continuously do a video streaming in the software. I am new to this and want to know how to do it.
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Jul 15, 2014
I was testing my JavaFX2.2.7 based media player code in a current Java 6 application when I discovered that HTTP Live Streaming does not seem to work. I can play a local file of the supported format (Sintel trailor mp4 h264) but when I try and use an HTTP Live Stream instead, nothing plays. (for example [URL] ). I end up with a blank player, and no exceptions or errors.
private static final String MEDIA_URL = "http://download.oracle.com/otndocs/products/javafx/JavaRap/prog_index.m3u8";
Media media = new Media(MEDIA_URL);
MediaException ex = media.getError();
if (ex != null){
System.out.println("Media Error" + ex.getMessage());
} else{
System.out.println("No Media Error");
}
Program console output: "No Media Error"
I thought it was something wrong with my player code, so as a last resort, I went to JavaFX 2 - Ensemble and copied the source and put it directly into my application and ran it... Unfortunately the same result occurs. The player runs, but simply shows a blank video window. The controls are available, but no video plays.
Based on the Release notes for Java 2.2.7 I was under the impression that HLS was supported. Am I incorrect?
I cannot upgrade to Java 7 as I am firmly stuck with Java 1.6.0.32 due to project constraints.
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Oct 30, 2014
I need to copy a file from Windows folder to unix folder using Java
I need a FTP utility.
The file is processed by a Java program and the file has to be written to Unix folder
I have the unix server name and folder name.
how to do it?
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Aug 19, 2014
I am looking for java codes to generate a word document based on a word template, basically, I have a word template created and in my local path, the template has a proper format with some fields which will be filled in after java codes ran. The java codes will fetch one record from a table, and open the word template and then fill the fields in the word template, and created a new word document and save it in another folder.
I found this example: [URL] which is similar except it uses xml template instead of word template, how to make it work to change the template from xml to word (docx) template?
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Sep 22, 2014
I know that it's possible to retrieve a line from a txt file but say for example my file looked like this:
staff id = 1
firstname
surname
age
staff id =2
firstname Kate
surname Hollar
age 33
staff id =3
firstname Daniel
surname Hong
age 21
It is possible to retrieve just the staff id's?
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Apr 28, 2009
Here is the code I am trying to execute its giving me the error with TextReader..
import java.io.*;
import java.util.*;
public class WordCount {
static TextReader in; // An input stream for reading the input file.
static PrintWriter out; // Output stream for writing the output file.
[Code] .....
The error is:
C:
eha>javac WordCount.java
WordCount.java:20: cannot find symbol
symbol : class TextReader
location: class WordCount
static TextReader in; // An input stream for reading the input file.
[Code] .....
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Jul 31, 2014
I've been wondering about this for a while. Is there any way to parallel I/O operations or is this a bad idea? If you could create two lists of good and bad ways to parallelize I/O.
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Aug 12, 2014
I have a code that clear old text then add new text to text file afterthat download the file but the problem my code dose not add new text
FileInputStream fileToDownload ;
private static final int BYTES_DOWNLOAD = 1024;
response.setContentType("text/plain");
String name = request.getParameter("n");
String text = new String(request.getParameter("text").getBytes("iso-8859-1"), "UTF-8");
[Code] ....
How to clear old text then add new text to text file
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Aug 25, 2014
I have a problem with € symbol ... an application write a String content on the file system with following code:
out = new FileOutputStream(strPath + "import.xml");
out.write(trp.getTrpXMLModel().getBytes("ISO-8859-1"));
It's correctly wrote on the file system:
TT;Pierre-H€enri;;Orange Grove;zefezfezfez, Directeur Juridique;TT;;azdaz;01 53 33 56 87;ezfezfez;01 53 33 51 59;.....&ée&ée;;;;;;132;CORDIAL;aaa
But when the application try to read the previous file with following code:
BufferedReader in = new BufferedReader(new InputStreamReader(inStream,"ISO-8859-1"));
String line = in.readLine();
The application isn't able to properly read the symbol ... and return following line, without "€":
TT;Pierre-Henri;;Orange Grove;zefezfezfez, Directeur Juridique;TT;;azdaz;01 53 33 56 87;ezfezfez;01 53 33 51 59;.....&ée&ée;;;;;;132;CORDIAL;aaa
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Oct 5, 2014
Requirements - Use only standard Java API and no apache file utils for this.
Most of the answers I found on the internet either dont meet this requirement or load all file names into an array which can consume too much memory when no. of files = 20,000+. how I can do this. Is there also a way to keep track of new files that were added during the execution of the loop in this code ?
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May 20, 2014
I would like to create a component to detect the file being modify before process.is it the right way to detect the file modification based on file size value?
Below are the flow:
1. Get the file size of a file
2. Used file size value encrypt it with MD5 algorithm, and say it generated us encrypted value "0123sdf"
3. to avoid user modify the file content, before file process, we take the file and do the encryption with md5 again, if it return value "0123sdf", then we are sure it doesn't have modification.
my question:
a. is it the right approach to detect file modification?
b. what the library advise to use or using java.security.DigestInputStream will do?
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Sep 18, 2009
I am trying to execute the a command using process builder. But that command is having some Japanese Character. So it is executing the command but result is not as expected.
command i tried : 1) echo 拝見 マイクロエレクトロニクス 2) mkdir "d: est拝見 マイクロエレクトロニクス"
OS: XP SP2
result: some chunk char are getting displayed.
See here a sample code which i tried ...
String commandNotWorksFine ="echo 拝見 マイクロエレクトロニクス";
String charSetname = "Shift_JIS";
String[] envArr = new String[] { "cmd", "/c", commandNotWorksFine};
ProcessBuilder builder = new ProcessBuilder(envArr);
Process p = builder.start();
[Code] ....
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Jul 30, 2006
I want to create hidden files, some sample code for doing this.
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