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.
I have upgraded to myeclipse 10.7 ,java "com.sun.java.jdk.win32.x86_64_1.6.0.013" and Struts 2.1 (Right now using Struts 1.1 support) from myeclipse 10.7 ,java 1.4 and Struts 1.1. I installed jasperassistant 2.4.2 plug-in using jasperReports 2.0.2 (My old report files were using same version).
All files compile successfully in new environment but when I export I get following error Export to PDF
a. Reports having no crosstab "Java.lang.NullPointerException"
b. Reports reports having crosstab "Error loading object from InputStream" java.io.InvalidClassException: net.sf.jasperreports.crosstabs.base.JRBaseCrosstabGroup;
Export to EXCEL
a. Reports having no crosstab java.lang.NullPointerException
b.Reports reports having crosstab java.lang.NullPointerException
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.
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
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
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 ?
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?
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();
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.
I am looking for a pure java api that can read metadata from an mp4 file, I have looked online but all apis I found are wrappers to native code. How to read mp4 with java .....
I have created a small application for editing text using StyledDocument and JTextPane. Now, you can set the font size, font colour, and other font related stuff. My question is, how could I save this document? What is the format? When I reopen this document, all the decorations I have done to the file should be there. How do I do this?
I want to know which Java class and method that can be called in order to copy the content of a flash drive(usb) without opening the flash drive. If possible also to know the prodecure on how to do it. I've tried some overloaded methods of copy() from the java.nio package.
The question is when you send two messages from the client to the server does the server read the messages as one input or do you have to read both inputs on the server side?
Im using DataInputStream and DataOutputStream
On the client side I send two messages one for the database action to be performed and the send is the information needed to get the job done.
Example I want to search for a product in the database.
I send to the server an output message saying search product. I then send to the server which product I want to be searched.
The server then retrieves the message by in.readUTF(); switch statement determines what database action should be performed. Within that case I call another in.readUTF() to pass the information to the database on what product to search for.
Would this work or would the server read both messages from the client as one input stream?
My code runs correctly when i run the clients one after another without using threads.I am getting this following error when i run my multi-threaded server. When a server accepts a client connection, ClientHandler is the thread that handles that client.Exception in thread "main"
java.io.StreamCorruptedException: invalid stream header at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:737) at java.io.ObjectInputStream.<init>(ObjectInputStream.java:253) at comm.DOMTransfer.<init>(DOMTransfer.java:25) at ClientHandler.<init>(ClientHandler.java:18) at GridInfo.main(GridInfo.java:34)This is where the error occurs:input = new ObjectInputStream(socket.getInputStream());
I am creating an application with having a callerID module. This module is to read calling phone number from modem. I have googled and reference many SerialPort related stuff but could not find a concrete solution. I am able to detect phone ring using serialEvent with javax.comm jar.
I am wondering if AT commands can be used to read/get calling phone number. I also referred following AT commands:
AT+CLIP AT+VCID AT+CNUM
1. Is it possible to read calling phone number using AT commands or any other alternative
2. Which AT command can be used and how to send from java application..
1) I don't know what regular expression can i use. 2) I want a line to check that preceding line should have //StorageVersion . 3) n then i will check any string between := K[' and '];. From above log file "'706146.0.22106932'" is the value that i am looking for.
I have been going over my code line by line, over and over again for nearly and hour now...When I execute method `file.createNewFile()`, the method returns true and throws no exceptions. It even says that the file exists. However, the file is not created and cannot be accessed until the program has exited.
File portLib = new File(""); private class RememberPortAction extends AbstractMenuItemAction { methods... protected void actionPerformed() { LibraryCreator creator = new LibraryCreator(self, logger); File newPortLib;
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?
I'm trying to synchronize two folders and their sub directories between a client and a server. I have a modified version of this class which I've posted below. In my Client class, I create a WatchDir object and call its processEvents() method in an infinite loop. The method returns a myTuple object (a struct containing the event type and a path object) if an event is registered and null if not.
The problem is that this only seems to work for the first event to happen in the directory (i.e. if I add a file to the watched folder, my WatchDir object.processEvents() returns one Tuple with an ENTRY_CREATE event and never returns another Tuple for other file additions/deletions/modifications that happen after). I'd like for processEvents to be continuously called (hence the infinite while) returning a Tuple each time some event occurs.
