How to redirect verbose garbage collection output to a file? Suns site shows an example for unix but it doesn't work for windows.
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I have the below method which is meant to append information to a file but I get the error below. In the method I use parts of robocode API which inherits ... |
we are trying to re-direct the output of the list to a file using the below cmd(java) in ubuntu,
Pls let us know if this works or not ?
Process p = ... |
I have a data of Element class. I'm trying to write its values to a file but I'm having trouble:
< Some process to acquire values into the variable "fieldData" >
// Prepare ...
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Are there any Open Source Java tools for parsing FORTRAN output? I'd like to be able to write something like
Format format = new Format("(1x, 2(F10.3,I3,' XY ',F7.3))");
String s = " -12345.897 ...
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Im trying to write a batch file to find the JRE directory by querying the registry.
I'm using REG QUERY which is returning the following output:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\JavaSoft\Java RuntimeEnvironment\1.6
JavaHome REG_SZ ...
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This is in Java 6.
I've seen more than once that people create temp files, do something, then rename it to the output file. Everything is wrapped in a try-finally block, where ... |
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Here is the situation:
I have a shell script - script.ksh
I am calling it from a java program and I need the stdout from the script in the java program.
I also need ... |
Below is the Java code for reading an existing text file called Sales.txt
and outputting a bar chart to a text file called storeReport.txt
Each asterisk represents $100 in sales.
import java.io.*;
import ... |
I am have a real hard time with this program i have to write.
The program has to
Read in from the file
- Name
- Asking Price
- Sale Price
- Amount still owed on Mortgage
Print out AND ... |
Here is the file which I am trying to get a display in a web browser via terminal on mac.
When I run the program it does not send the program to ... |
How to print java output to both shell console and at the same time in some file? is that possible?
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In a program, I currently have
process.serialize(System.out);
This generally output the object "process" to the screen in a XML format.
But I want to redirect this XML format into a saved file, like test.XML. ... |
So I am working on this program (obviously homework):
In a diving competition, each contestant's score is calculated by dropping the lowest and highest scores
and then adding the remaining scores. Write a ... |
So I have this method that should read a file and detect if the character after the symbol is a number or a word. If it is a number, I want ... |
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Please help me in asking the user to enter text, an int, long etc. That is , how do we accept input from the user. The input can be of any data type., including objects. Is there a mechanism of cin and cout like in c++. In fact, I want to teach my students asking for input in their programs like ... |
hi, I have already posted this question on another forum but haven't got any answer. 1) How do I direct a file to a printer device. 2) I have used the following code to print a frame- Properties props = new Properties(); PrintJob pj = Toolkit.getDefaultToolkit().getPrintJob(this,"Print Job", props); this refers to the frame required to be printed. I get the print ... |
Most of the programmers use DataIputStream to take input from the user. I use BufferedReader. Which one is the best? While using BufferedReader, as soon as i accept a char, Java is not allowing me to accept a String. I have to set BufferedReader to null and then reassign it to System.in. Is there any way to get around this prob ... |
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2nd way to send a job to the printer: Following is the discussion between me and William Brogden (Bill) By Faisal Ahmed Farooqui (Faf) on Wednesday, July 11, 2001 - 02:46 pm: Edit can any 1 pls tell me. how can i send output to the printer using java.io classes === FAF By William Brogden (Bill) on Wednesday, July 11, 2001 ... |
My experience is that RandomAccessFile is a lot slower than using FileOutputStream and FileInputStream. If the file can be processed linearly, RAF is a waste of time. Even for random access, I found that I could get better performance by creating a brand new FileOutputStream, using skip() to get to the desired position, reading from there, and then closing the reader. ... |
im using jdom to construct an xml document. once im done building it i need to output the stream and pipe it to an input stream...right now it just hangs my server....any help would be greatly appreciated.. org.jdom.output.XMLOutputter xmlOut = new org.jdom.output.XMLOutputter(); //import it into domino ahhh yeahh.... PipedOutputStream ps = null; PipedInputStream is = null; try { ps = new ... |
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Well, Leslie's replaceAll() suggestion is probably easiest. But since she/he (darn unisex names) suggests it can't be done with streams, I feel I must offer a counterexample: import java.io.*; public class SpaceTrimWriter extends FilterWriter { private boolean isStartSpace = true; private boolean lastCharWasSpace; public SpaceTrimWriter(Writer out) { super(out); } public void write(char[] cbuf, int off, int len) throws IOException { for ... |
Hi. I've built a program to create a large DOM tree from a database. I need to be able to write this dom tree out to a file as XML, and i have only found code to send it to system.out(). Is there a way i can re-direct this to a file??? Here is the chunk of code i'm using: try ... |
hey, I'm working on a database for a school project and I want to read and write to a file to load/save my information. Now I don't want the file to be one thats address is provided by the user but instead, one that is in a desired location of mine... sort of. Maybe it would be easier to explain another ... |
o.k..here is the example i'm trying from the bruce eckel book: date time tempreture 09032004 22.43 298.30 have to be manuplated to be: Line 1:The date on which the Summary file is generated in the format dd/mm/yyyy. Line 2:The time at which the Summary file is generated in the format hh:mm and using a 24 hour clock format for the hours. ... |
Hi - 1. Your code seems to work fine: to accept keyboard input from a console mode Java application, you must indeed read from System.in, just as you're doing. I cut/pasted your code; here's the output: /** * Trying to read from stdin * * EXAMPLE COMPILE/RUN: * * C:\temp>java hello2 => * calling readIn()... * Enter the coordinates: * 1.3 ... |
Hello, I'm a beginner in Java. I'm creating a file so i can write my query results to it. This is what i'm doing: Printwriter out = null; String filename = "data"; try{ File output = new File(filename); out = new PrintWriter(new BufferedWriter(new FileWriter(output.getPath()))); } catch(IOException e){ System.out.println("could not create file"); } when i run this : it always give a ... |
hello, I have a program thatdetermines the change to be dispensed from a vending machine. it will display the change from 25 cents, 10 cents and 5 cents. I have all of the code completed but when i run the program the input price is different than what i typed in. I can not understand why it does this. Can anyone ... |
Think about how you'd describe the problem in "structured English". Does this capture the problem? Does it bring any data structures to mind? main loop: interval start time = 06:00 for every entry in the log parse out the time, userid and count if the time >= interval start + five minutes report the current interval start a new interval end ... |
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Hi, I am trying to run a unix command from within the java code. I am not able to make it work. I am enclosing the code and the error message that I am getting. Any help is highly appreciated. import java.io.*; public class RunCommand { public static void main(String args[]) { String s = null; try { Process p = ... |
Hi, I am running a Perl script in my Java code.The problem is I am not able to capture the output of the Perl script and then write it into a file.Here is that part of my code which deals with running the Perl script, capturing the output and writing it to a file. ------------------------------------------------------------------------ public void itemStateChanged(java.awt.event.ItemEvent e) { ... |
You write strings just exactly like that, except you've changed the name of the variable from outputFile to just out. That part won't work. One warning though: the FileWriter will create Unicode text files. If you want regular text files (single byte characters), you should use a FileOutputStream instead. The drawback is that any non-ASCII charcters you may be using will ... |
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The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - ... |
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Hi, I'm a Java newbie, baptized by fire and am looking for some assistance regarding what I'm trying to do. I need to write to a text file using output that has been decrypted in my Java app. Following is what I have: import java.io.BufferedWriter; import java.io.FileWriter; import java.io.File; import java.io.Writer; import java.io.IOException; public class TokenParser { private String userToken; public ... |
You guys have been great at helping figure things out so I'm appreciating your responses!! My next problem is this, I am suppose to have a program that opens a file and read it as and prints it out. I've done that and that is great. But I then need to open a new file and have that print out as ... |
I'm trying to catch terminal feedback and send it to a JTextArea. Below is a method I use to send commands to the OS. When I use it, the terminal will show the output (as long as you have a terminal to start with, in jar form, you won't see the feedback). Anyone know how I can bend terminal feed back ... |
import java.io.*; public class FileIo { public static void main(String args[]) { try { File f=new File("Testdir"); f.mkdir(); File subf=new File(f,"Subdir"); subf.mkdir(); File fsubf=new File(subf,"SsubDir"); fsubf.mkdir(); File newf= new File(f,"a.txt"); newf.createNewFile(); FileWriter fw=new FileWriter(newf); BufferedWriter bw=new BufferedWriter(fw); bw.write("SCJP"); bw.flush(); bw.close(); } catch(IOException e) { System.out.println(e); } } } Here is my Code , I am not able to Write into the ... |
Hi Guys, Im new to Java and am looking for a solution to a printWriter issue im having. So far my program works fine up to the point where I want to write its final output to a new file. The program itself compiles with no errors, however, even when given a direct route to write the file to it still ... |
public void writeFile(TreeMap attrMap,TreeMap duplicateAttrMap,Map attributes,BufferedWriter bufferedWriter) throws IOException { int recCount1=0; for (String key : attrMap.keySet()) { // condition to check with aigrole attribute if(duplicateAttrMap.containsKey(key)){ Set attributeSet = (Set) duplicateAttrMap.get(key); for(String attribute : attributeSet){ bufferedWriter.write(attributes.get(key)); bufferedWriter.write(attribute); bufferedWriter.newLine(); } } else { bufferedWriter.write(key); bufferedWriter.write(attrMap.get(key).toString()); logger.info("--getting new key value------"); bufferedWriter.newLine(); } } bufferedWriter.newLine(); bufferedWriter.write("-------------------------------------------"+ recCount1++); logger.info("--added new line------"+ recCount1++); bufferedWriter.newLine(); ... |
Hello, I have a working program that normally, I hand-wire the information into the file and it is stored in an array and I work with it till the end of the program. This is where the problem is coming from. Now the document will be in an external file, and the informations needed for the program should be read from ... |
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Is it possible to write a Linux/Unix/Win2k service that interfaces with a Java application that captures write outputs from another application, say a log file, and creates a copy of the write stream to another file? In other words, I want a service to "listen" for writes into a file call err.log...Err.log is a proprietary and needed file for the application ... |
public static void main(String[] args) throws Exception { File fl1 = new File("D:/Education/Java/Test1"); File fl2 = new File("D:/Education/Java/Test2"); fl1.renameTo(fl2); p("New File Name is : "+ fl1.getName()); } For the above code snippet O/P is run: New File Name is : Test1 BUILD SUCCESSFUL (total time: 2 seconds) My question is : At my system although the Test1 gets renamed as Test2 ... |
please help me on these problem. I have 2 files, one named output.txt and one named constraint.txt. I need to compare the contents of those files line by line....(contents are array like this: a1,b2,c2, a2,b1,c1, a2,b1,c2, ) if any constraint exist in output file, i have to delete the line and will produce final output file without constraint... |
I made a OneTimePad program and want to output the encrypted message to a text file from a string. I want to keep a running log of the output so it stores the string again after each iteration of the program. Just looking for a little push in the right direction as to what I should be doing. |
import nu.xom.*; public class RssStarter { public static void main(String[] arguments) { // create an element to serve as the document's root Element rss = new Element("rss"); // add a version attribute to the element Attribute version = new Attribute("version", "2.0"); rss.addAttribute(version); // create a element and make it a child of Element channel = new Element("channel"); rss.appendChild(channel); ... |
package Tutorial; /** * * @author Admin */ import java.io.*; public class fileStreamTest{ public static void main(String args[]){ try{ byte bWrite [] = {11,21,3,40,5}; OutputStream os = new FileOutputStream("C:\\Temp\\test.txt"); for(int x=0; x < bWrite.length ; x++){ os.write( bWrite[x] ); // writes the bytes } os.close(); InputStream is = new FileInputStream("C:\\Temp\\test.txt"); int size = is.available(); for(int i=0; i< size; i++){ System.out.print((char)is.read()+ " ... |
Hi every one am new in java , am just try to TEACH myself by books and so on. I faced this problem yesterday .. Can any one tell how i can read file its content like this : 1 3 1 4 8 3 0 0 i wanna read each column alone. PS || i tried the array .. but ... |
Confused about File Input and Output Assignment This is my last Java programming assignment before my final exam. Unfortunately, neither my textbook not the online module is really helping me figure this assignment out! The purpose of this assignment is to create a sequential file and then use that file by printing its contents. This assignment requires an application ... |
Hi Sir, I have used jdbc connection to get connecting to the database. Now i want to write the sql quires result to a file and also to the console..For that i have written a query below: --------******Code Start Her*****------------- import java.io.BufferedWriter; import java.io.FileOutputStream; import java.io.FileWriter; import java.io.IOException; import java.sql.*; public class DatabaseCon { public static void main(String args[]) throws IOException ... |
try { inFile = new BufferedReader(new FileReader("history.dat")); outFile = new PrintWriter(new FileWriter("data.out")); inputString = inFile.readLine(); while((inputString=inFile.readLine()) != null) { if(inputString.length()==0) { outFile.print(inputString+"\t"); } else { outFile.print(inputString); } } } catch(IOException e) { e.printStackTrace(); } finally { if(outFile != null) { outFile.flush(); outFile.close(); } if(inFile != null) { inFile.close(); } } } } |
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nadermaram wrote: I am sorry that some people around here don't like this, but honestly, I am trying to help. it is just a matter of diversity. And I think that is a gift. let's value it. Nadermaram, we all could just write this code and do it a lot better than you, but we chose not to because it is ... |
I'm taking my first JAVA class at my local university and I'm writing the last assignment for my class. I got the assignment done; however, for extra credit I'm being asked to send the output to an HTML file and make the output 'look pretty'. The assignment is basically dealing with arrays and some the principle of classes that we've learn ... |
i need to arrange out put in proper format while writing to a file.For this purpose i set maxium length as 50.My idea is generated substring is less than 5O add that much blank space and write to file.For this ineed to know one "\t" is how much character and secondly how implement that......My logic is that set maxium length as ... |
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How about creating a subset of the input and then writing a pseudo-code using paper/pencil to ATTACK the problem.Once it satisfies the requirements,then deciding the datatypes to convert it into a working program.Also since this is a part of another code you may like to consider the dependencies. Experts may advise on this. Thanks. |
Okay, I'm guessing the "New to Java" is where I need to be for this kind of new programmer question. I'm working on a program for an assignment and I've completed the entire program and going back over the assignment I've realized that my quick reading has really messed me up. I was supposed to output all information to a file. ... |
Hey guys!! What are my options for saving a file. Or most efficient ways to do this? My program either opens an existing file "data.txt" and adds lines, removes lines...etc... or if it doesn't exist, creates a new file "data.txt" and adds lines, removes lines...etc... When I'm done working on the file I want to save the changes I made to ... |
public static void main(String[] args) throws Exception { File fl1 = new File("D:/Education/Java/Test1"); File fl2 = new File("D:/Education/Java/Test2"); fl1.renameTo(fl2); p("New File Name is : "+ fl1.getName()); } **For the above code snippet O/P is** run: New File Name is : Test1 BUILD SUCCESSFUL (total time: 2 seconds) My question is : At my system although the Test1 gets renamed as Test2 ... |
}//end of constructor public void actionPerformed(ActionEvent e) { Object source = e.getSource(); if(source == enterButton) { //////////begin series of question events////////// if(questionCount == 0) {//sets up panel for first question //presents 1st question //System.out.println("now in 1st question"); herodotusCB.setVisible(true); plinyCB.setVisible(true); khaldunCB.setVisible(true); herodotusCB.setEnabled(true); plinyCB.setEnabled(true); khaldunCB.setEnabled(true); enterButton.setText("ENTER"); titlePanel.remove(titleLabel); titlePanel.add(qtnLabel); qtnLabel.setText(qtn0); } if(questionCount == 1) {//presents 2nd question //scores 1st question qtnLabel.setFont(qtnFont2); qtnLabel.setText(qtn1); tempNumber = ... |
FileInputStream fis = new FileInputStream(inputFile); BufferedInputStream bis = new BufferedInputStream(fis); BufferedReader dis = new BufferedReader(new InputStreamReader(bis)); char test = dis.read(); dis.close(); bis.close(); fis.close(); It shows that the test character is representing (char)63 (question mark). Any idea on how to solve this? I want to write (char)147 to the file and read it as (char)147, not as (char)63. Thanks in advance, Dennis ... |
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I/O is covered in every Java book or tutorial. You can't learn to program without access to one or the other, preferable both. You can start by reading [Essential Java Classes|http://java.sun.com/docs/books/tutorial/] which discusses I/O. Don't forget to use the Code Formatting Tags so the posted code retains its original formatting. That is done by selecting the code and then clicking on ... |
Your actual problem isn't numbers with zeroes. It's input which doesn't represent an integer at all, because it includes letters or embedded spaces or decimal points or something like that. Try writing some code which converts the input to an int, and catches that NumberFormatException if it is thrown. I don't know what exactly you want to do with it, but ... |
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hi, i am new to java, i would like to write a program which executes a command in command prompt, giving some result and want to read this command prompt output to a file like this: 1) first i need to exeucte "dir c:" command which will give the details fo that particular directory 2) the output displyed on the command ... |
(a) For this part, you will be adding a new method to the Airport class that allows us to create a new Airport object given a String that describes the new airport we would like to create. Write a static method called buildFromString that takes a String as a parameter, and returns a new Airport object. The parameter should be a ... |
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