Re: Adding / Multiplying two matrices - Java Discussion Boards

Re: Adding / Multiplying two matrices

Richard MacCutchan15-Oct-09 4:32

Richard MacCutchan

15-Oct-09 4:32

nt_virus wrote:
But result are showing in vertical manner.. not like matrix way..

I can never remember what the order is supposed to be (I stick to one-dmensional arrays), so I'm afraid you will have to find it by trial and error. I would give you a hand but my Java system is not usable today.

Re: Adding / Multiplying two matrices

nt_virus15-Oct-09 4:57

nt_virus

15-Oct-09 4:57

please do it in c# if you can, I will convert. I did my all possible things.

Re: Adding / Multiplying two matrices

Richard MacCutchan15-Oct-09 4:59

Richard MacCutchan

15-Oct-09 4:59

OK, but it may take some time.

Re: Adding / Multiplying two matrices

nt_virus15-Oct-09 5:00

nt_virus

15-Oct-09 5:00

yes, no problem. do you use messenger ?

Re: Adding / Multiplying two matrices

Richard MacCutchan15-Oct-09 6:35

Richard MacCutchan

15-Oct-09 6:35

OK, I got the answer in C#, so I think the Java code needs to be:

for (int i=0;i < first.length;i++)
{
    for (int j = 0; j < first[i].length;j++)
    {
        sum[i][j] = first[i][j] + second[i][j];
        System.out.print(sum[i][j] + "  ");
    }
    System.out.println("");
}

I'm not sure about the expression first.length, but basically i needs to iterate the rows, and j the columns. You also need to print each column value without the newline (print rather than println?) and then put the System.out.println(""); statement after the last column. It probably needs some tidying up to get the columns lined up, but I'm sure you will be able to manage it.

No, not on messenger.

Re: Adding / Multiplying two matrices

nt_virus15-Oct-09 7:42

nt_virus

15-Oct-09 7:42

fantastic.. It works.. you made my day (night here actually) ..

Thanks a lot.

Re: Adding / Multiplying two matrices

Richard MacCutchan15-Oct-09 7:46

Richard MacCutchan

15-Oct-09 7:46

Cheers, happy to help. It also gave me some incentive to get back on Java which I haven't touched for a while.

It's early evening here (UK) so are you west or east?

Re: Adding / Multiplying two matrices

nt_virus15-Oct-09 7:50

nt_virus

15-Oct-09 7:50

Java is very nice.

I m on east. India. +5.30

Re: Adding / Multiplying two matrices

Richard MacCutchan15-Oct-09 9:21

Richard MacCutchan

15-Oct-09 9:21

You may find this hard to believe but that's the country of my birth! I was born in Mussoorie (in the hills), my dad and my brother in Naini Tal.
But my only return visit was in 2005 to Bangalore, which also was nice - at least the people.

How to load a picture in JFrame

akosidandan14-Oct-09 17:02

akosidandan

14-Oct-09 17:02

Hello I would like to ask a simple way to load a picture in JFrame?
I was a planning to convert my txt based game into a JFrame with a simple image
design but I dont know yet how to load a picture in JFrame.

thank if in case someone give suggestion,
dfan23

Re: How to load a picture in JFrame

427748016-Oct-09 6:24

4277480

16-Oct-09 6:24

Here you go Link[^]

[Message Deleted]

s_a_20026314-Oct-09 8:12

s_a_200263

14-Oct-09 8:12

[Message Deleted]

Re: Designing oop

427748014-Oct-09 8:21

4277480

14-Oct-09 8:21

I am not sure whether your question is a concept or an actual implementation either way you already have the list of registered news papers just add a method to the agency class something like broadcast newspaper that takes the news papers names as parameters. In the news papers class you will have a method that listens for the broadcast.

Good luck

[Message Deleted]

s_a_20026314-Oct-09 8:45

s_a_200263

14-Oct-09 8:45

[Message Deleted]

Re: Designing oop

427748014-Oct-09 8:51

4277480

14-Oct-09 8:51

What is the scope of the implementation? and include the code you did so that I could analyse and give a solution.

[Message Deleted]

s_a_20026314-Oct-09 9:12

s_a_200263

14-Oct-09 9:12

[Message Deleted]

Re: Designing oop

427748014-Oct-09 11:00

4277480

14-Oct-09 11:00

Classes:

Agency will create 3 Files and append to them:
1. Agency: The name of it
2. AgencyNews: relating agency and news
3. News: the news of the newspaper add optional newspaper name and datetime

Steps:
Newspaper will choose which agency to write the news. The name of the newspaper and the news will be added by the agency to the files.
Agency will broadcast it by simply looping its file and getting the newspapers names then going to the AgencyNews file and locating its news file then loop over the news files and prints out the news to all the newspapers.

Things to look for:
1. Arraylist
2. append to text file
3. File directory and name

The above solution is to store more data rather than calling the methods over and over for every transaction.

This relation is better suited with database.

Hope this helps

Java Datagrid! [modified]

Yonathan111114-Oct-09 3:39

Yonathan1111

14-Oct-09 3:39

Hello everybody, Is there such datagrid control in Java like we have in VS? Thank you.

modified on Wednesday, October 14, 2009 9:47 AM

Re: Java Datagrid!

Richard MacCutchan14-Oct-09 5:58

Richard MacCutchan

14-Oct-09 5:58

Read this[^] and try this[^].

Re: Java Datagrid!

427748014-Oct-09 8:22

4277480

14-Oct-09 8:22

Simple yet effective[^]

Good Luck

SOA programing interfaces ?

thanhle35913-Oct-09 3:48

thanhle359

13-Oct-09 3:48

Hi All..
I have been learning System open architechture programing interfaces. My program used Javascript(the users could used it but they could not modified it).Could someone give me a tutorial.

Thanks

Kim.

Re: SOA programing interfaces ?

427748014-Oct-09 8:23

4277480

14-Oct-09 8:23

Clarify your question to get an answer.

Re: SOA programing interfaces ?

thanhle35919-Oct-09 3:02

thanhle359

19-Oct-09 3:02

Could you show me how to capture video screen, or desktop screen using javascript

Sort Array in ascending and descding

nt_virus13-Oct-09 3:33

nt_virus

13-Oct-09 3:33

Hi.

I m running this code.

import java.util.*;
public class Main{
    public static void main(String[] args) {
 int[] value = {2,1,3,6,5};
         System.out.println(value);       // Print unsorted array.
        Arrays.sort(value); // Sort array
        System.out.println(value);       //
    }}

The output is showing..

run:
[I@3e25a5
[I@3e25a5

why is it so.. I m confused.. Please help me. Also please tell me how to do in descending order by user input. Collections class will do with List

Re: Sort Array in ascending and descding

Richard MacCutchan13-Oct-09 4:51

Richard MacCutchan

13-Oct-09 4:51

nt_virus wrote:
why is it so

You cannot print an array or integers directly in this way. You need to iterate the array and print each individual value after you have converted it to a character string. Take a look at some of the tutorials on the web.

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