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Java I/O Q&A » Operation » output 

1. How to redirect verbose garbage collection output to a file?    stackoverflow.com

How to redirect verbose garbage collection output to a file? Suns site shows an example for unix but it doesn't work for windows.

2. Java file input and output    stackoverflow.com

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 ...

3. redirecting output of a cmd to a file    stackoverflow.com

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 = ...

4. Writing an Element object to file using java    stackoverflow.com

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 ...

5. Parsing FORTRAN output files using Java    stackoverflow.com

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 ...

6. For /f and REG QUERY output and parentheses, trying to find JRE home    stackoverflow.com

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  ...

7. Delete temp file during finally vs delete output file during catch    stackoverflow.com

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 ...

8. Trying to redirect output of shell script to file and stdout. cd command in the script causes weird behaviour    stackoverflow.com

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 ...

9. Writing to File in Java: output displays differently in NotePad vs. Word/WordPad/NotePad++    stackoverflow.com

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 ...

10. Need help with Reading File Input than Calculating!    stackoverflow.com

I am have a real hard time with this program i have to write. The program has to Read in from the file

  1. Name
  2. Asking Price
  3. Sale Price
  4. Amount still owed on Mortgage
Print out AND ...

11. Redirect your output as an html file through terminal    stackoverflow.com

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 ...

12. Print java output to a file    stackoverflow.com

How to print java output to both shell console and at the same time in some file? is that possible?

13. How to save the output into a file    stackoverflow.com

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. ...

14. Help with a program that needs to read a data file and output scores    stackoverflow.com

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 ...

15. Replacing the output of one method into the output of another method    stackoverflow.com

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 ...

16. file input and output    coderanch.com

17. input and output    coderanch.com

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 ...

18. directing output to printer    coderanch.com

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 ...

19. input output    coderanch.com

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 ...

20. Sending output to Printer    coderanch.com

22. output to the printer ???    coderanch.com

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 ...

23. binary input and output?    coderanch.com

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. ...

24. Piped Input to Output    coderanch.com

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 ...

25. printer output    coderanch.com

26. removing unwanted characters from output    coderanch.com

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 ...

27. redirect XML/DOM output to file??    coderanch.com

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 ...

28. Input output question    coderanch.com

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 ...

29. input file and output file    coderanch.com

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. ...

30. Reading in Program Output at command line...?!?    coderanch.com

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 ...

31. Writing output to a file    coderanch.com

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 ...

32. input is showing different than output    coderanch.com

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 ...

33. Input / output    coderanch.com

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 ...

34. Output data to printer    coderanch.com

35. Having trouble in running a unix command and getting the output    coderanch.com

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 = ...

36. problem reading output of a subprocess    coderanch.com

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) { ...

37. Writing to an output file    coderanch.com

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 ...

39. change standard output to a file    coderanch.com

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. - ...

40. converting output to input    coderanch.com

41. writing output to a file    coderanch.com

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 ...

42. Reading file Input and Output    coderanch.com

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 ...

43. Read terminal output.    coderanch.com

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 ...

44. Not able to write the output to the file.    coderanch.com

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 ...

45. Writing Output To A File    coderanch.com

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 ...

46. How to change the values in the file (output)    coderanch.com

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(); ...

47. Java Code to Edit Output File    coderanch.com

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 ...

48. How to redirect the output into a file.    coderanch.com

51. Intercepting writes from another application and redirecting output to another file    dbforums.com

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 ...

52. Question about File renameTo() method : Abnormal output    java-forums.org

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 ...

53. how to remove constraint from output file    java-forums.org

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...

54. Writing output file    java-forums.org

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.

55. Redirecting output of java program to file    java-forums.org

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); ...

56. File input output    java-forums.org

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()+ " ...

57. Input/ output file    java-forums.org

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 ...

58. Confused about File Input and Output Assignment    java-forums.org

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 ...

59. Output write into a file    java-forums.org

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 ...

60. read file and output new file with tabing each new paragraph. please help    forums.oracle.com

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(); } } } }

61. How to save output in a file    forums.oracle.com

63. save output to a file    forums.oracle.com

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 ...

64. Send output to HTML file    forums.oracle.com

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 ...

65. arranging output on writing to file    forums.oracle.com

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 ...

66. Writing Output To New File    forums.oracle.com

67. How to write the output to a file    forums.oracle.com

68. Search and provide the output of the same name in a file    forums.oracle.com

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.

69. Sending Command Window Output to File    forums.oracle.com

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. ...

70. file input output    forums.oracle.com

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 ...

71. Question about File renameTo() method : Abnormal output    forums.oracle.com

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 ...

72. Trouble With File Input and Output    forums.oracle.com

}//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 = ...

73. write (char)147 to output file become (char)63 when read.    forums.oracle.com

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 ...

74. Why the output is not written to the file    forums.oracle.com

75. Problem with File Input and Output    forums.oracle.com

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 ...

76. How can i not print a zero value to the output file (pls see code)    forums.oracle.com

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 ...

78. Re: Writing output on a file?    forums.oracle.com

79. Re: Writing output on a file?    forums.oracle.com

80. Re: Writing output on a file?    forums.oracle.com

81. Command Prompt Output to a File    forums.oracle.com

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 ...

82. About file read and output (complex question)    forums.oracle.com

(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 ...

83. writing a html output to a file    forums.oracle.com

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