How To Read NetCDF Files
Sep 16, 2014how to read a netcdf file in java?
View Replieshow to read a netcdf file in java?
View RepliesHow do I get my program to read .txt files? My code doesn't work. I use eclipse.
I tried to use FileReader and BufferedReader objects, but the code doesn't work.
How do I get my program to read .txt files in java?
I am fallowing programming tutorials on youtube.And this code is for reading zip files content.I did the same things like in the video.But Code dosent work
try {
ZipInputStream zis=
new ZipInputStream(new FileInputStream("C:UsersxxxDesktop ry.rar"));
ZipEntry zip;
while((zip=zis.getNextEntry())!=null){
jTextArea1.append(zip.getName());
zis.closeEntry();
}
zis.close();
} catch (FileNotFoundException ex) {
Logger.getLogger(Zip.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(Zip.class.getName()).log(Level.SEVERE, null, ex);
}
I have seen different methods of creating and reading files (specifically text files) in Java. The PrintWriter method or the Formatter with a Scanner to read the file, using a BufferedWriter with a BufferedReader, etc. They will all read/write text files, but from what I understand they do so in different ways. When would it be more beneficial to use a buffered writer than, say, PrintWriter, which is much simpler code-wise? Is there a "best" way to handle i/o in general in Java?
View Replies View RelatedI need to read folder structure from the excle file and need to read all the files which are available inside folder structure.folder structure like below
c:Migrate
C:MigrateMigrateFiles
...
...
..etc.
I am ble to read files which is avalibale in all the folders with single thread,i want to read those files with multiple threads,each thread shoud reads the files from different folder. here how to read.
I've written a program to read files in a directory but I'd like for it to only read the text files of that directory.
import java.io.*;
public class Data {
public static void main(String[] args) throws IOException {
String target_dir = "C:files";
File dir = new File(target_dir);
File[] files = dir.listFiles();
[Code] .....
My background is mainframe and i'm new to java. We're moving from mainframe to the java world and I'm trying to achieve a task. I have a main folder and then bunch of sub folders and each sub folder has bunch of xml files, files size are varies some of them are 900kb. I need to read these xml files and send the output to the txt file (comma separated).
Some possible options or sample example... Please find below the sample xml file. I need to extract information's only where
FORM name="F00001".
[CODE]<PACKET>
<FORM name="F00001" sequence="0">
<FIELD sequence="1">02</FIELD>
<FIELD sequence="2">00000</FIELD>
<FIELD sequence="3">CAB100</FIELD>
<FIELD sequence="4">TEFAP001</FIELD>
<FIELD sequence="5">EMPTY FIELD</FIELD>
<FIELD sequence="6">009.999.989</FIELD>
[Code] .....
I am trying to write a program that read from a csv file called matches.csv.
A single football match can end with a win or a draw: in first case the winner team get 3 points and the loser none, in the second case of draw each of the two teams get 1 point.
For example, the first line of the file matches.txt is as follow:
In the file it contains the following data.
17/08/2013ArsenalAston Villa13
24/08/2013Aston VillaLiverpool01
This means that a match has been played on the 17/08/2013 where Arsenal scored 1 goal while Aston Villa 3 goals: thus Arsenal got 0 points while Aston Villa 3 points.
How can I structure my output to make it make it read
Position Team Played Points
1 Aston Villa 2 3
2 Liverpool 1 3
3 Arsenal 1 0
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class Teams {
public static void main(String[] args) {
String fileName = "matches.csv";
File file = new File(fileName);
[code]....
I have a Dynamic Web Project , and in one of the Class method I am reading an xml file. The problem is until now I am giving the absolute path of file on my system
File quizFile=new File("C:UsersMahtabQuizzesquiz1.xml");
I understand its bad way , so I want to put these xml files in my eclipse project itself.
So I created a new folder called quizzes under src and put all those xml files in quizzes folder.
I am trying to read the file , I tried
File quizFile=new File("quizzesquiz1.xml");
File quizFile=new File("quizzesquiz1.xml");
But getting FileNotFondException , how can I refer to these files.What path should I point to.
I got a question in my last interview, its all about multithreading, interviewer asked me to write a program, to write the contents of three files(F1,F2,F3) in to a new File F4, using multithreading , first thread should read the first file and second thread should read second file, so the File F4 should contain F1's contents in first then F2's contents after that etc. I tried to give my best shot, but i couldn't get a way to ensure that the first thread is reading the first file and write to F4 then second thread reading the second file and writing once first file is written completely into F4 and so on ..how to do this?
View Replies View RelatedI am trying to write a program that read from a csv file called matches.csv.
A single football match can end with a win or a draw: in first case the winner team get 3 points and the loser none, in the second case of draw each of the two teams get 1 point.
For example, the first line of the file matches.txt is as follow:
In the file it contains the following data.
17/08/2013 Arsenal Aston Villa 1 3
24/08/2013 Aston Villa Liverpool 0 1
This means that a match has been played on the 17/08/2013 where Arsenal scored 1 goal while Aston Villa 3 goals: thus Arsenal got 0 points while Aston Villa 3 points.
How can I structure my output to make it make it read
Position Team Played Points
1 Aston Villa 2 3
2 Liverpool 1 3
3 Arsenal 1 0
Java Code:
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class Teams
{
public static void main(String[] args)
{
String fileName = "matches.csv";
[Code] ....
I am quite new to Java. I have downloaded a tictac example Java applet code and I run it on Eclipse with no problems. But when I try to test it outside Eclipse by doing the following:
I copy the .class file and two gif-images to another location and call the Java from html code:
<applet code="hello/HelloWorld.class" WIDTH="300" HEIGHT="300">
And I put the two gif-files to hello/images folder. I get and an error:
AccessControlException
access denied ("java.io.FilePermission")
"I:ImportantProgrammingWebProgramminghelloim ages
ot.gif" "read")
The path seems to be correct. I load the pictures from the Java code by:
notImage = getImage(getCodeBase(), "http://www.javaprogrammingforums.com/images/not.gif");
If I draw (drawLine) the X and O instead of using gif, then it works.... so its really the gif-loading which is the problem.
I have a Windows XP. I also tried to run it inside XAMPP server folder in my machine but the same problem. How could I be able to run it on my machine?
I have a program that is a XML-parser, and it works fine when I'm running it from NetBeans. But when I create a JAR-file and run the very same program, it cannot find the xml file. Consider this small program that addresses my problem:
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import javax.xml.parsers.DocumentBuilder;
[Code] .....
I am trying to make a Library that will read some Input Files from a File . Like When We Enter Nuber from a System.in
1
2
45
667
77
34
and then store these values in int[] array
What I want is I Save all these values in a File and at Run time pass path of that file to command line arguments and then int[] array will be initialize using that
something like this [URL]
I have a requirement to read all the xml files from a parent folder and write in a spreadsheet(separate spreadsheet for each xml file)
I have written the below code in which xml and excel file name are hardcoded. The format of xml file is same.
package xmlexcel;
import org.apache.poi.hssf.usermodel.*;
import java.util.ArrayList;
import java.awt.List;
import java.io.*;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
[Code]...
What step to know to develop software..
View Replies View RelatedIn a program I created, I'm using a text file that contains some texts needed for the program. The method relevant to this is something like the following.
private String wordgen(){
try {
BufferedReader reader = new BufferedReader(new FileReader("src/Resources/adjectives.txt"));
Random rand = new Random();
int low = rand.nextInt(400);
String fil="";
int i=0;
while(i!=low){
[Code]...
The program runs fine in netbeans project but once the jar is created it does not corporate with the text file. ("null" is returned) How can I attach text files to jar and exe?
I need to transformation the txt files into xml files, but each row txt files don't have same elements, for example the first book is composite one author
<books>
<book>Title</book>
<price>price</price>
<author>Author</author>
</books>
but the second book is composite two author
<books>
<book>Title</book>
<price>price</price>
<author>Author</author>
<author>Author2</author>
</books>
I would have the xml files with the number of authors variables, I can use JAXB for my problem?or not?
I want small code in java
I restricted to .exe(Ex:usersfile.exe) file uploading in java by checking with extension.Now i renamed .exe to .png or txt or etc..(Ex:usersfile.exe to usersfile.png). Now it is uploading but my requirement is after renamed also .exe restricted to uploading. It is possible or not in java and javascript?
i'm using JDK 1.6.
I am trying to run a java app from a webpage.
The java app is written with Netbeans.
Heres my files:
Java main class:
Java Code: package Classes;
import java.applet.Applet;
[Code].....
You can test the page here: Test page for launching the application via JNLP
Java Code:
import java.io.EOFException;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.sql.*;
public class TestSerializer
[Code] .....
I'm reading from one file and writing it into another.I then want to delete the first file and use the second (it will get the first files name) .My sample java file works completely fine but it doesn't work on my actual file -it looks like it populates my test file like it should but it does not delete the original. Occasionally DMap.xml won't delete either - I try and rename it and normally I get the error of 'the file is open in Java platform SE binary' so the files is open somewhere - but I thought I had closed it correctly so have I done that wrong? I have put the basic code :
public class DeleteEnvironmentsWindow extends JDialog {
String xmlFile = "c:DMap.xml";
String fromFile =xmlFile
public void removeEnvironment(){
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = null;
Document doc = null;
[code]....
know my code sample file of renaming a file and deleting an original file will work fine but when I use the code within my main java file - it appears to populate the file that I want populating fine but wont delete the origional. I have everything on my c drive so I can very easily keep track of what files I do and don't have.
Can using the same files in different methods cause problems? (Beginning Java forum at JavaRanch)
What is wrong with my code? System.out.println prints the correct name, but it fails when i try to rename the files in a directory.
import java.io.BufferedReader;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.io.*;
import java.io.File;
[code]....
I was looking at the Sound API pages in the java tutorials. I was planning to use it to run wma files. Fortunately, for me, I found, soon into the tutorials, that these API DON'T support the type I have all of my files in (I have a ton of wma files but none of the libraries mentioned support them.)
I almost thought I heard JavaFx or whatever it's called does, but that sounds foreign and Netbeans lists it as a separate type of java in a way, so I don't know if it would be cross-platform or if it could work with the JavaSE API.) Nor do I know what JavaSX or whatever it's called is really, other than that it's more for internet than application.
If I wanted a JPanel or Applet acting as the content pane of a JFrame or being in a JFrame, could I use JavaFX (or whatever it's called) or some third party library (that I always tend to end up spending hours on trying to get it to find the jar files when I import them, so I hope I don't need too many jar files!!!! ) would it work with the JavaSE API?
I don't know much about Java and playing sounds (other than that there is a static method, I think under Toolkit, that will play a system beep) with programs.
However, I can see that that packages don't support certain types (so much for cross-platform!!!!!!! ) and also that a while back that Oracle took over and that they aren't really updating the Java Sound APIs really that much at all
So, without having to learn a whole new Java set of standards (assuming JavaFX or whatever it's called is a different set of standards from JavaSE), is there a way to play .wma?
That's all I seem to have on my computer.
(I suppose I could create new sounds, though if Oracle isn't updating the library, who knows if even that works anymore, but if you're trying to run a Java Media Player that runs lots of DIFFERENT sound file types, this seems a real setback. )
I heard you could convert them to MP3s (I heard there were free things that did it, but who knows if the things aren't filled with viruses that'll do it or, even if they're not, that they'll really mess up the quality of the sound and that I might lose the old .wma file in the process even if it doesn't corrupt the sound.)
But, even if I get a .mp3, I heard the main JavaSE libraries DON'T cover that either, though it was said it was easier to make it run them than .wma files.
MediaPlayer and the main JavaSE classes don't seem to be able to fit for this type of program (a java media player) that I was planning. Heck, they can't even play any music I have on my computer at all, media player or not.
I know that I need to use substrings, but I'm not sure how to implement them. All of the names are red in from the file "employees.txt".
Using the file Employees.txt
1) Scan the file and create user ids for each person according to the following scheme
a) Take the first and last character of the first name, convert them to upper case
b) Take the first and last character of the last name, convert them to upper case
c) Concatenate the results from a and b
i) Example: John Brown would yield => JNBN
d) Add the length of the first name to the length of the last name, disregarding spaces
e) Concatenate the result from step c to the result of step d
i) Example: John Brown would yield => JNBN9
f) Concatenate a four digit number to the end of this.
i) The numbers should begin with 0000 and increment by 1
ii) Example: If John Brown is the fifth name in the list the resulting UserID would be => JNBN90004
2) Display the user ids in four columns with a width of 14