java Applets - Java Discussion Boards

Hi,

I have created a Combobox containg checkbox as its items using renderer.
But am not able to select the checkboxes.
Plz help me in this.

Prajna

Hey!

Let me get this: a combobox containing a checkbox Confused | :confused:

What is this for? verifying the user's choise is REALLLY the one he wants??

Or did you use a list and just swaped it?

greets
Torsten

yup...combobox containing checkbox as its elements. now am done with this job, but not able to select the checkboxes Frown | :(

...I still can't believe we're talking about the same component.

~~combobox as Color-Chooser with renderer^~~

I think you might have something like this

~~listview with checkboxes^~~

EDIT:

Did you get it? Laugh | :laugh:

this has been VB.net... sorry! I just checked the code they use and noticed the strange style... OMG | :OMG:

Combobox^]

JList^]

modified on Wednesday, March 25, 2009 3:26 AM

s... its combo and checkboxes.

please check my last posting, I first commited it exidently. I have added some links which might help.

hey thank u, will check it out first.

i have the code of madelbrot but i dont know how to modify the program
so the question is:
how to modify the program Mandelbrot to allow a general rectangular region of the complex plane to be viewed in the image. The user may select the rectangle by dragging the mouse.
i have to modify this program but i dont know how
so would anyone help me for this problem:
<pre&gt
import javax.swing.*;
import java.awt.*;
import java.awt.image.*;

public class Mandelbrot extends JApplet {
public static void main(String s[]) {
JFrame frame = new JFrame();
frame.setTitle("Mandelbrot set");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JApplet applet = new Mandelbrot();
applet.init();
frame.getContentPane().add(applet);
frame.pack();
frame.setVisible(true);
}

public void init() {
JPanel panel = new MandelbrotPanel();
getContentPane().add(panel);
}
}

class MandelbrotPanel extends JPanel{
BufferedImage bi;

public MandelbrotPanel() {
int w = 500;
int h = 500;
setPreferredSize(new Dimension(w, h));
setBackground(Color.white);
bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
WritableRaster raster = bi.getRaster();
int[] rgb = new int[3];
float xmin = -2;
float ymin = -2;
float xscale = 4f/w;
float yscale = 4f/h;
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
float cr = xmin + j * xscale;
float ci = ymin + i * yscale;
int count = iterCount(cr, ci);
rgb[0] = (count & 0x07) << 5;
rgb[1] = ((count >> 3) & 0x07) << 5;
rgb[2] = ((count >> 6) & 0x07) << 5;
raster.setPixel(j, i, rgb);
}
}
}

private int iterCount(float cr, float ci) {
int max = 512;
float zr = 0;
float zi = 0;
float lengthsq = 0;
int count = 0;
while ((lengthsq < 4.0) && (count < max)) {
float temp = zr * zr - zi * zi + cr;
zi = 2 * zr * zi + ci;
zr = temp;
lengthsq = zr * zr + zi * zi;
count++;
}
return max-count;
}

public void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(bi, 0, 0, this)
}
};&lt;/pre&gt; tags

Hi
I am developing an application in ASP.NET. The Server os is 2003.
The client is win XP. Now that i am running my application in the client
side and need to print the documents from the client machine (POS / Bill Priniting)

I have tried in all the possible ways.. But unable to print in the local machine.

Is it possible with Java script.. can any body help us..

Seenu

You mean stuff like this?[^]

ps. You would get better responses in the Web Development Forum.[^]

Edit: JavaScript is one word.

hmmm pie

how to implement (Html Editor) Numbered list and Bulleted with JTextPane?

I am having problem to make user interface in java like when user shall be prompted to enter name ,address, and each time when user press enter the new field is visible.
Also I have to do code cubic equation in java and is having much difficulty in defining and coding.

To make a GUI use NetBeans[^]

keerans wrote:
Also I have to do code cubic equation in java and is having much difficulty in defining and coding.

That's nice to know.

hmmm pie

Hi everybody.

I'm working about 1.5 years on C#.NET , I'm not an expert but I'm OK.
I'm working on image processing most of the time these days.

Now I wanna know , Is there any a advantage in Java compared with C# ?
Is it essential to know Java ?

Many Thanks in advance.

Mohammad Dayyan wrote:
Is there any a advantage in Java compared with C# ?

This is most discussed topic. Here[^] is one for instance. The only advantage I am seeing for JAVA is it's portability.

Smile | :)

Navaneeth

How to use google | Ask smart questions

Thanks

Mohammad Dayyan wrote:
Now I wanna know , Is there any a advantage in Java compared with C#

That of course is subjective.

If you just want to learn another language just for the knowledge and perhaps for employment benefit then learn SQL. SQL is different enough from C#/Java that learning it requires work. And it is useful in most businesses.

Hi am having problem in running my code for cubic in java. Please help

Be more specific.

There are billions of problems, so please narrow it down.

hmmm pie

import java.util.Scanner; /* Import the Java Scanner class to get input entered at the keyboard. */

{{ public class

public static void main(String[] args);

final double TAX_RATE = .1025;
final double COMM_RATE = .02;
final double DISC_PCT1 = .28;
final double DISC_PCT2 = .21;
final double DISC_PCT3 = .14;
final double DISC_PCT4 = .07;
final double DISC_LEVEL_1 = 50000.00;
final double DISC_LEVEL_2 = 49999.00;
final double DISC_LEVEL_3 = 39999.00;
final double DISC_LEVEL_4 = 34999.00;

/* This is where you will define constants for tax rate of 10.25% and dealer commission of 2%.*/

/* This where you will define the additional variables necessary. One integer has already been defined for you. */

int carYear,
carMileage;

double carCost,
salesTax,
dealerCommission,
totalCost,
discount;

/* This integer variable holds the model year of the car. */

/* The following declares an instance, or object, of the Scanner class to get keyboard input. */

Scanner scan = new Scanner(System.in);

/* <1> Prompt for and get the car's model year. */

System.out.print("\nPlease enter the car's model year: ");

carYear = scan.nextInt();

/* <2> Prompt for and get the car's mileage. */

System.out.print ("\nPlease enter the car's mileage; ");

carMileage = scan.nextInt ();

/* <3> Prompt for and get the car's list price. */

System.out.print ("\nPlease enter the car's list price; ");

carCost = scan.nextDouble();

/* <4> Compute the sales tax for the sale of the car. */

salesTax = carCost * TAX_RATE;

/*Determine discount rate*/

if(carCost>= DISC_LEVEL_1)
discount = carCost * DISC_PCT1;
else if (carCost>= DISC_LEVEL_2)
discount = carCost * DISC_PCT2;
else if (carCost>= DISC_LEVEL_3)
discount = carCost * DISC_PCT3;
else if (carCost>= DISC_LEVEL_4)
discount = carCost * DISC_PCT4;
else discount = 0;

/* <5> Compute the dealer's commission for the sale of the car. */

dealerCommission = (carCost - discount) * COMM_RATE;

dealerCommission = carCost * COMM_RATE;

/* <6> Compute the total cost, including tax, for the sale of the car. */

totalCost = carCost + salesTax;

/* <7> Print program header message. */

System.out.print("\n\n Northern Illinois Used Cars");
System.out.print("\n*************************************");
System.out.print("\n Cost of a Used Car");
System.out.print("\n*************************************\n");

/* <8> Print the report lines. */

do
}

System.out.printf ("\n Car's Model Year: %5d", carYear);

System.out.printf ("\n Car Mileage: %7d miles", carMileage);

System.out.printf ("\n Car's List Price: %10.2f dollars", carCost);

System.out.printf ("\n Sales Tax: %10.2f dollars" ,salesTax);

System.out.printf ("\n Total Cost: %10.2f dollars\n\n", totalCost);

System.out.printf ("\n\n Discount %10.2f dollars", discount);

System.out.printf ("\n\n Dealer's Commission: %10.2f dollars", dealerCommission);

System.out.print("\n\nWould you like to loop? Enter '1' for yes: ");

choice = keyScan.nextInt();

{while(choice==1);

}

i cannot get this program to work... i know there are mistakes but i cannnot fix them....

Please read the posting guidelines.

vitaminwater22 wrote:
i cannot get this program to work... i know there are mistakes but i cannnot fix them....

Be specific, which errors do you have, where are you stuck, ... ?

Anyway, the code you pasted doesn't make any sense (misplaced braces, no name for the class, no body for the main function, all the code is in your class and not in a function, ...). If this is your real code (but I can hardly imagine this), then nobody here will be able to help you: you are lacking the most basic skills in Java. I suggest you start from the begining: learn the syntax (from a good book, it is always the best).

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

If it compiles then I suggest you Debug it line by line because there may be a problem with your logic.

hmmm pie

modified on Friday, March 20, 2009 6:09 PM

fly904 wrote:
there may be a problem with you logic

That's a very kind way of putting it. Big Grin | :-D

Panic, Chaos, Destruction.
My work here is done.

In a good mood today Big Grin | :-D

hmmm pie

hiii
please give me the code and srs for the project of "WEBSITE DEVELOPMENT IN JAVA"....
thnk you Big Grin | :-D

shalabh bindal