Java

Compress and decompress string between java and c#

12-Dec-11 3:21

You could use Wikipedia as a reference for Distributed Computing[^]:

The computers interact with each other in order to achieve a common goal.

I guess that's the definition.

regards Torsten
When I'm not working

Hossein Khalaj8-Dec-11 5:58

Hossein Khalaj

8-Dec-11 5:58

Hi every body,,
I write an app on android and i want send a string with sms to my server, because my length of string is bigger than one sms, i have to compress sms and send to my server, in my server i have a app that wrote with .net, and my problem in here!!!

I can`t find a solution for compress data in Android(Java) and decompress in C#....

Please Help...... Frown | :(

Re: Compress and decompress string between java and c#

TorstenH.8-Dec-11 22:18

Re: Compress and decompress string between java and c#

8-Dec-11 22:18

you can't find a solution means you can't find a code that is already written in C# and Java, right?

first you should try to reduce the amount of data in that SMS-String. Can values be resized?
For example can you use integers instead of keywords? Every fixed value can be melted down to a short form (acronyms, integer, single char, char/int compbination, ...).
Are there enum in there -> also usable as integer.

141 characters is a lot of data - and to use an old phrase: "141 characters should be enough for everybody". Laugh | :laugh:

regards Torsten
When I'm not working

jschell9-Dec-11 11:31

jschell

9-Dec-11 11:31

Law of diminishing returns.

The SMS limit is very low. Compression requires overhead. Consequently normal compression is unlikely to save space.

Generalizing the other response.

You want to send a message which has content A.
Your first step should be to look at A and find a different way to send the same information which takes less room.

For example say you want to send

item="purple pants"

Steps to reduce above.
1. Create table of common terms (can't be too big
2. Change above to the following
i40,57

How to use Tomcat instead of GlassFish with NetBeans?

Jun Du6-Dec-11 9:22

Jun Du

6-Dec-11 9:22

I am a newbie in J2EE. I have installed NetBeans 7.01 package with GlassFish 3.1.1 (and Tomcat 7.0.14). By default NetBeans starts up the GlassFish server whenever I launch a web app. What should I change if I want to use Tomcat, instead of GlassFish with NetBeans? Thanks!

Best,
Jun

modified 6-Dec-11 15:29pm.

Re: How to use Tomcat instead of GlassFish with NetBeans?

Gerben Jongerius6-Dec-11 20:18

Gerben Jongerius

6-Dec-11 20:18

You need to right click the project go to the properties. Under Run you can select which application server you want to deploy the project to.

Re: How to use Tomcat instead of GlassFish with NetBeans?

Skynet_Code6-Dec-11 21:02

Skynet_Code

6-Dec-11 21:02

In fact, when you're creating your new J2EE project, you've got the option to define where you've installed the App. Server desired for your project, in order to allow the IDE to build the specific artefact with its deployment descriptors.

Using Javascript to list local directory contents

Member 84548753-Dec-11 19:17

Member 8454875

3-Dec-11 19:17

I am building an interface that will be run only locally on users computers using HTML (no web servers involved). What I'd like to do as part of this project is to be able to list the contents of local folders related to this project. Meaning I have a parent folder that will contain all the HTML pages as well as folders with PDF files in them. From my main page I'd like to have a link to those folders and when visited, that link would list the files in that folder. This way, when additional files are added or when files are deleted, the listing will reflect the actual folder contents. Right now this works by linking to the folders and getting the raw Directory listing but the listings are not pretty. I am looking for a more elegant way to achieve this.

Anyone know how to do this with HTML or Javascript?

Thanks,
Craig

Re: Using Javascript to list local directory contents

Richard MacCutchan3-Dec-11 21:30

Re: Using Javascript to list local directory contents

3-Dec-11 21:30

Quite possibly, but this is the Java forum.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

TorstenH.4-Dec-11 23:55

Steganography in Images and Audio

4-Dec-11 23:55

I would use a CMS. No need to develop that yourself.

try WebsiteBaker[^] as a simple CMS for small projects.

regards Torsten
When I'm not working

khanhhungict3-Dec-11 18:35

khanhhungict

3-Dec-11 18:35

[^]
Source code Steganography in Image and Audio(LSB):
Link: http://www.mediafire.com/?t8zm8ild43l90m3[^]

http://www.dreamincode.net/forums/topic/27950-steganography[^]

hanoi tower

bhira29-Nov-11 22:34

bhira

29-Nov-11 22:34

what are the coding is right for out put visualisation hanoi tower in netbeans?

import java.awt.*;

import javax.swing.*;

import no.geosoft.cc.graphics.*;

/**
* G demo program. Demonstrates:
*
*

A sample game application
*
Graphics animation
*
GObject reparenting
*

*
* @author Jacob Dreyer
*/
public class Demo14 extends JFrame
{
private TowersOfHanoi towersOfHanoi_;
private GWindow window_;
private Peg[] pegs_;
private int nDiscs_;
private JButton startButton_;

public Demo14 (int nDiscs)
{
super ("G Graphics Library - Demo 14");
setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);

nDiscs_ = nDiscs;

// Create the graphic canvas
window_ = new GWindow (new Color (200, 230, 200));
getContentPane().add (window_.getCanvas());

// Create scene
GScene scene = new GScene (window_);
double w0[] = {0.0, 0.0, 0.0};
double w1[] = {4.0, 0.0, 0.0};
double w2[] = {0.0, nDiscs_ * 2, 0.0};
scene.setWorldExtent (w0, w1, w2);

// Add title object and add to scene
scene.add (new Title());

// Create the 3 pegs and add to the scene
int nPegs = 3;
pegs_ = new Peg[nPegs];
for (int i = 0; i < nPegs; i++) {
pegs_[i] = new Peg (i + 1.0);
scene.add (pegs_[i]);
}

// Create the discs and add to the first peg
for (int i = 0; i < nDiscs; i++) {
Disc disc = new Disc ((double) (nDiscs - i) / nDiscs);
disc.setPosition (1.0, i);
pegs_[0].add (disc);
}

pack();
setSize (new Dimension (500, 500));
setVisible (true);

// Create the puzzle and execute the solution
towersOfHanoi_ = new TowersOfHanoi();
towersOfHanoi_.solve();
}

public void discMoved (int source, int destination)
{
// This is the disc to move
Disc disc = (Disc) pegs_[source].getChild (pegs_[source].getNChildren()-1);

double y0 = disc.getY();
double y1 = nDiscs_ + 4.0;

double x0 = pegs_[source].getX();
double x1 = pegs_[destination].getX();

// Animate vertical up movement
double step = 0.2;
double y = y0;
while (y < y1) {
disc.setPosition (x0, y);
disc.redraw();
window_.refresh();
y += step;
}

// Reparent peg
pegs_[source].remove (disc);
pegs_[destination].add (disc);

// Animate horizontal movement
step = 0.05;
double x = x0;
while (x != x1) {
disc.setPosition (x, y);
disc.redraw();
window_.refresh();
x += (x1 > x0 ? step : -step);
if (Math.abs (x - x1) < 0.01) x = x1;
}

// Animate vertical down movement
step = 0.2;
y = y1;
y1 = pegs_[destination].getNChildren() - 1;
while (y > y1) {
if (Math.abs (y - y1) < 0.01) y = y1;
disc.setPosition (x, y);
disc.redraw();
window_.refresh();
y -= step;
}
}

/**
* Graphics object for canvas title.
*/
class Title extends GObject
{
private GSegment anchor_;

public Title()
{
GStyle style = new GStyle();
style.setLineStyle (GStyle.LINESTYLE_INVISIBLE);
style.setForegroundColor (new Color (100, 100, 200));
style.setFont (new Font ("serif", Font.PLAIN, 36));
setStyle (style);

anchor_ = new GSegment();
addSegment (anchor_);

GText text = new GText ("Towers of Hanoi", GPosition.SOUTHEAST);
anchor_.setText (text);
}

public void draw()
{
anchor_.setGeometry (20, 20);
}
}

/**
* Graphics representation of a peg.
*/
class Peg extends GObject
{
private double x_;
private GSegment peg_;
private double[] xy_;

public Peg (double x)
{
x_ = x;

GStyle style = new GStyle();
style.setBackgroundColor (new Color (100, 100, 100));
setStyle (style);

peg_ = new GSegment();
addSegment (peg_);

xy_ = new double[] {x_ - 0.05, 0.0,
x_ - 0.05, nDiscs_ + 2,
x_ + 0.05, nDiscs_ + 2,
x_ + 0.05, 0.0,
x_ - 0.05, 0.0};
}

public double getX()
{
return x_;
}

public void draw()
{
peg_.setGeometryXy (xy_);
}
}

/**
* Graphics representation of a disc.
*/
class Disc extends GObject
{
private double size_;
private GSegment disc_;
private double x_, y_;

public Disc (double size)
{
size_ = size;

GStyle style = new GStyle();
style.setForegroundColor (new Color (255, 0, 0));
style.setBackgroundColor (new Color (255, 150, 150));
setStyle (style);

disc_ = new GSegment();
addSegment (disc_);
}

public void setPosition (double x, double y)
{
x_ = x;
y_ = y;
}

public double getY()
{
return y_;
}

public void draw()
{
double[] xy = new double[] {x_ - size_ / 2.0, y_,
x_ - size_ / 2.0, y_ + 1.0,
x_ + size_ / 2.0, y_ + 1.0,
x_ + size_ / 2.0, y_,
x_ - size_ / 2.0, y_};

disc_.setGeometryXy (xy);
}
}

/**
* Class for solving the "Towers of Hanoi" puzzle.
*/
class TowersOfHanoi
{
public void solve()
{
solve (nDiscs_, 0, 2, 1);
}

private void solve (int nDiscs, int source, int destination, int auxiliary)
{
if (nDiscs == 1)
discMoved (source, destination);

else if (nDiscs > 1) {
solve (nDiscs - 1, source, auxiliary, destination);
discMoved (source, destination);
solve (nDiscs - 1, auxiliary, destination, source);
}
}
}

public static void main (String[] args)
{
int nDiscs = 8;
Demo14 demo = new Demo14 (nDiscs);
}
}

help me please Cry | :((

Re: hanoi tower

TorstenH.29-Nov-11 22:52

29-Nov-11 22:52

it is supposed to be YOUR homework. so I suggest that you do it yourself.

We will help you if you've got a problem, but we do not provide solutions for homework.

regards Torsten
When I'm not working

Re: hanoi tower

RaviRanjanKr3-Dec-11 10:12

RaviRanjanKr

3-Dec-11 10:12

Please wrap your code in Pre tag. it will give better readability to other user to understand your code snippet.

image procesing in java

palikalirona29-Nov-11 20:10

palikalirona

29-Nov-11 20:10

resize

private BufferedImage resizeImage(BufferedImage originalImage, int type,int width, int hieght){
BufferedImage resizedImage = new BufferedImage(width, hieght, type);
Graphics2D g = resizedImage.createGraphics();
g.drawImage(originalImage, 0, 0, width, hieght, null);

g.dispose();

return resizedImage;
}

convert into gray scale

public static BufferedImage convertToGrayscale(BufferedImage source) {
BufferedImageOp op = new ColorConvertOp(
ColorSpace.getInstance(ColorSpace.CS_GRAY), null);
return op.filter(source, null);
}

public BufferedImage gray(BufferedImage source)
{

BufferedImage image = new BufferedImage(source.getWidth(), source.getHeight(),
BufferedImage.TYPE_BYTE_BINARY);
// BufferedImage.);

Graphics g = image.getGraphics();
g.drawImage(source, 0, 0, null);
g.dispose();

return image;
}

rotate

public static BufferedImage rotate(BufferedImage img, int angle) {
int w = img.getWidth();
int h = img.getHeight();
BufferedImage dimg = dimg = new BufferedImage(h, w, img.getType());
Graphics2D g = dimg.createGraphics();
g.rotate(Math.toRadians(angle), h/2, w/2);
g.drawImage(img, null, 0, 0);
return dimg;
}

horizontalflip

public static BufferedImage horizontalflip(BufferedImage img) {
        int w = img.getWidth();
        int h = img.getHeight();
        BufferedImage dimg = new BufferedImage(w, h, img.getType());
        Graphics2D g = dimg.createGraphics();
        g.drawImage(img, 0, 0, w, h, w, 0, 0, h, null);
        g.dispose();
        return dimg;
    }

dithering

public static BufferedImage processImage(BufferedImage inputImage) {

// Create a binary image for the results of processing

int w = inputImage.getWidth();
int h = inputImage.getHeight();
BufferedImage outputImage = new BufferedImage(w, h,
BufferedImage.TYPE_BYTE_BINARY);

// Work on a copy of input image because it is modified by diffusion

WritableRaster input = inputImage.copyData(null);
WritableRaster output = outputImage.getRaster();

final int threshold = 180;
float value, error;

for (int y = 0; y < h; ++y)
for (int x = 0; x < w; ++x) {

value = input.getSample(x, y, 0);

// Threshold value and compute error

if (value < threshold) {
output.setSample(x, y, 0, 0);
error = value;
}
else {
output.setSample(x, y, 0, 1);
error = value - 255;
}

// Spread error amongst neighbouring pixels

if((x > 0) && (y > 0) && (x < (w-1)) && (y < (h-1)))
{
value = input.getSample(x+1, y, 0);
input.setSample(x+1, y, 0, clamp(value + 0.4375f * error));
value = input.getSample(x-1, y+1, 0);
input.setSample(x-1, y+1, 0, clamp(value + 0.1875f * error));
value = input.getSample(x, y+1, 0);
input.setSample(x, y+1, 0, clamp(value + 0.3125f * error));
value = input.getSample(x+1, y+1, 0);
input.setSample(x+1, y+1, 0, clamp(value + 0.0625f * error));
}

}
return outputImage;

}

// Forces a value to a 0-255 integer range

public static int clamp(float value) {
return Math.min(Math.max(Math.round(value), 0), 255);
}

public static final int getColorIndexSize(RenderedImage img) {
ColorModel cm = img.getColorModel();
if (cm instanceof IndexColorModel) {
IndexColorModel icm = (IndexColorModel)cm;
return icm.getMapSize();
} else {
return 0;
}
}

Richard MacCutchan29-Nov-11 21:44

29-Nov-11 21:44

Please don't post messages like this here; read this[^]. If you have an idea for an article then follow these guidelines[^], and do it properly.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Nagy Vilmos5-Dec-11 1:58

Nagy Vilmos

5-Dec-11 1:58

Have a TVG in compensation for the little one.

Panic, Chaos, Destruction. My work here is done.
Drink. Get drunk. Fall over - P O'H
OK, I will win to day or my name isn't Ethel Crudacre! - DD Ethel Crudacre
I cannot live by bread alone. Bacon and ketchup are needed as well. - Trollslayer
Have a bit more patience with newbies. Of course some of them act dumb - they're often *students*, for heaven's sake - Terry Pratchett

Richard MacCutchan5-Dec-11 2:21

5-Dec-11 2:21

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

bharath S h14-Dec-11 15:25

bharath S h

14-Dec-11 15:25

'm doing my graduation project on RECOGNITION OF HANDWRITTEN SHORTHAND LANGUAGE STROKES .... So, please any one who is interested in it give me some guidelines...

1.thinking to implement it in MATLAB or JAVA... please suggest me which is better ...

2.will i get any module of code to build my project instead of building it from scratch..? if , from where pls specify it....

3.pls any one who is interested in guiding me may pls leave your mail id as comment.. so that i 'll ask for your help...

Richard MacCutchan14-Dec-11 22:07

14-Dec-11 22:07

bharath S h wrote:
doing my graduation project

1. Which is better? That is a very subjective question, better in what way? You need to research the languages and decide which better meets your needs.

2. Since it's your project then I would suggest you need to design and write it. Copying others' work for a graduation project is not really honest.

3. This won't happen. This is an open site where all assistance is offered in the forums and thus is public.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

bharath S h14-Dec-11 15:27

bharath S h

14-Dec-11 15:27

RaviRanjanKr3-Dec-11 10:17

RaviRanjanKr

3-Dec-11 10:17

Always wrap your code in Pre tag. it will give better readability to other user to understand your code snippet.