Passing a binary file to class outputing a compressed file
Hi,
Am i writing a program which gets passed a file to encode via "java compressor < <filename>".
Compressor is a class with main method.
what i have right now is simply:
public class Compressor {
* @param args the command line arguments
public static void main(String[] args) {
InputStream in = new FileInputStream ("");
File f = new File ("");
ByteArrayOutputStream out = new ByteArrayOutputStream (f.length());
int i;
while ((i = in.read()) != -1) {
out.write(i);
in.close();
byte[] result = out.toByteArray();
for (int j = 0 ; i < result.length ; j++) {
byte a = result[j];
} The program is suppose to read the input one byte at a time and treats each one as an instruction which encodes byte compressoring the file and finally outputing this newly compressed file. I'm not sure how the main method will take the filename i.e "java compressor examplefile", any guidance would help greatly.
Thanks
in the case above, the command line arguments are passed in the aaaaaaaaaaaaaaaaaaaaaaarggggggggggs array
you probably want aaaaaaaaaaaaaaaaaaaaaaarggggggggggs[0] for the filenameAm not sure i understand, do you mean i must change the param of the main method to String[] args[0] as this resulted in error when i did so. Or do you mean at command line instead file simply being passed to the Compressor program as
"java Compressor < examplefilename"
It has to be "java Compressor < examplefilename[0]" ?
If you could expand on this, would be grateful,
Thanks.
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public class Assignment1 {
public static void main(String[] names)throws IOException {
BufferedReader keyboard = null;
String userChoice;
String inputFile = null;
String studentData;
String searchFile = null;
String searchName;
String stringIn;
PrintWriter outputFile;
FileWriter fWriter = null;
BufferedReader fReader = null;
int first;
int last;
int mid;
int midValue;
int i;
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studentData = keyboard.readLine();
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outputFile.println(names);
} [b]outputFile.close();package assignment1;
import java.io.*;
import java.util.*;
public class Assignment1 {
public static void main(String[] names)throws IOException {
BufferedReader keyboard = null;
String userChoice;
String inputFile = null;
String studentData;
String searchFile = null;
String searchName;
String stringIn;
PrintWriter outputFile;
FileWriter fWriter = null;
BufferedReader fReader = null;
int first;
int last;
int mid;
int midValue;
int i;
int number;
// creates keyboard as a buffered input stream
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//prompts user to choose 1 or 2 to make a corresponding choice
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System.out.println("1 to Create a File: ");
System.out.println("2 to Search a File: ");
userChoice = keyboard.readLine(); //user enters 1 or 2
// converts a String into an int value
number = Integer.parseInt(userChoice);
fReader = new BufferedReader(new FileReader("studentData.txt"));
if (number == 1) {
System.out.println("Please Enter the File Name to Create: ");
studentData = keyboard.readLine();
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outputFile = new PrintWriter(fWriter);
names = new String[200];
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i < names.length) {
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System.out.println("Enter a name and press Enter. " +
"Type 'end' and press Enter when done: ");
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for(i=0; i<names.length; i++) ;
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selectionSort(names);
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outputFile = new PrintWriter(fWriter);
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System.out.println("Please Enter a File Name to search: ");
searchFile = keyboard.readLine();
inputFile = ("studentData.txt");
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fReader = new BufferedReader(new FileReader("studentData.txt"));
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searchName = keyboard.readLine();
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first = 0;
last = 199;
while (first < last)
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last = mid; // repeat search in bottom half.
} else if (searchName.compareTo(names[mid]) > 0) {
first = mid + 1; // Repeat search in top half.
} else {
// Found it.
System.out.println("The Name IS in the file.");
} // did not find it.
System.out.println("The Name IS NOT in the file.");
} else //if userChoice != 1 or 2, re-prompt then start over
System.out.println("Please Enter 1 or 2 or correctly " +
"enter an existing file!!");
// fWriter = new FileWriter("studentdata.txt");
//outputFile = new PrintWriter(fWriter); //output
public static void selectionSort(String[] names) {
//use compareTo!!!!
int smallIndex;
int pass, j = 1, n = names.length;
String temp;
for (pass = 0; pass < n-1; pass++)
//Code for Do/While Loop
do {
//scan the sublist starting at index pass
smallIndex = pass;
//jtraverses sublist names[pass+1] to names[n-1]
for (j = pass+1; j < n; j++)
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if (names[j].compareTo(names[smallIndex]) < 0)
smallIndex = j;
temp = names[pass]; //swap
names[pass] =names[smallIndex];
names[smallIndex] = temp;
} while (j <= names.length);
//File file = new File("studentData.txt");
This is the output window:
init:
deps-jar:
compile:
run:
Please Enter:
1 to Create a File:
2 to Search a File:
1
Please Enter the File Name to Create:
test
Exception in thread "main" java.lang.NullPointerException
at assignment1.Assignment1.selectionSort(Assignment1.java:134)
at assignment1.Assignment1.main(Assignment1.java:73)
Java Result: 1
BUILD SUCCESSFUL (total time: 9 seconds) -
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Excerpts from current code are as follows:
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Creating a ixml factory
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Connect internal XML table to stream factory
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EXCEPTIONS
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as implied by the comments the method above will successfully output the XML file to the g:drive but will not output to /TRICK/ location, which is where I need it to go in a background mode run.
This is a problem which has defeated all our local expertise and I would appreciate any help given... Barry JonesTry this code below:
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W_filename - This is a Path.
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changing
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if sy-subrc <> 0.
message id sy-msgid type sy-msgty number sy-msgno
with sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
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=============================================================
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=============================================================
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try {
((JetspeedRunData) data).setCustomized(null);
if (((JetspeedRunData) data).getCustomized() == null)
ActionLoader.getInstance().exec(data,"controls.EndCustomize");
catch (Exception e)
PortalLogger.logException("bugwatcherRefreshAction", e);
===============================================================
In the bugwatcher Action there is another function called PostLoadContent.java
here though i have found the portlet Id but unable to fetch that in the bugWatcherRefreshAction.java . I am also giving the code of that function under the bugWatcherAction.Java
================================================
// Get the PortletData object from intermediate store.
CacheablePortletData pdata =(CacheablePortletData) PortletCache.getCacheable(PortletCacheHelper.getUserHandle(
//rundata.getRequest().getRemoteUser()));
((JetspeedUser)rundata.getUser()).getUserName()));
pId1 = (String)portlet.getID();
PortalLogger.logDebug("in the bugwatcher action:"+pId1);
try {
Hashtable htStore = null;
// if PortletData is available in store, get current portlet's data from it.
if (pdata != null) {
htStore =(Hashtable) pdata.getObject( PortletCacheHelper.getUserPortletHandle(
((JetspeedUser)rundata.getUser()).getUserName(),portlet.getID()));
//Loop through the hashtable and put its elements in context
Set storeKeySet = htStore.keySet();
Iterator itr = storeKeySet.iterator();
while (itr.hasNext()) {
String paramName = (String) itr.next();
context.put(paramName, htStore.get(paramName));
bugwatcherRefreshAction bRefAc = new bugwatcherRefreshAction();
bRefAc.doPerform(pdata,context,pId1);
=============================================================
So this is the total scenario for the fetching the data , after clearing the cache and display that in the portal.I am unable to do that.Presently it is still fetching the data from the cache and it is not going to the database.Even the portlet Id is returning as null.
I am unable to implement that thing.
If you have any insight about this thing, that would be great .As it is very urgent a promt response will highly appreciated.Please send me any pointers or any issues for this I am unable to do that.
Please let me know as early as possible.
Thanks and regards,
Santanu Raha.Have you run it in a debugger? That will show you exactly what is happening and why.
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I am using Flex SWFLoader to load an animated swf file and added it as a component in xcelsius by add on manager. When i click preview button it throws the folloing error.
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I am embedding swf file by using the following lines of code
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Manimaran.
Edited by: manimaraninfo on Jun 18, 2009 10:47 AM
Edited by: manimaraninfo on Jun 18, 2009 10:48 AMHi
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Is text mining operations on document binary and its HTML output is simiar?
Does the text mining operations differ when I perform on document binary or its HTML output? Do you think the results would be the same, if i performed clustering operation on the HTML or text output of a binary document instead of its binary file.
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I'm trying to capture output of java files using Runtime.exec but I don't know how. I keep receiving error message "java.lang.NoClassDefFoundError:" but I don't know how to :(
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