Re: Get & Set - Java Discussion Boards

Re: Using the Observer and Observable Class

Shubhashish_Mandal2-Oct-13 22:26

2-Oct-13 22:26

few things that you have to know. Role of the Observer is to notify each subscriber if any changes happen.
If you see in your code there is a recursive call exist. In your main class , at the end, you are setting value in Observer. So Observer value changed and it convey the notify message to the subscriber.Again If you see in doAction() ,you can see that each Subscriber receive the notify message and again set the Observer value with new one. There for this action again update the Observer value and again Observer doing the above thing and thus fall in recursive call.

Regards
Shubhashish

Re: Using the Observer and Observable Class

angrybobcat7-Oct-13 20:55

angrybobcat

7-Oct-13 20:55

Where "Observer" is actually "Observable" as you got it right in your first post, since "Observer" and "Subscriber" are basically the same thing.

SVM implementation in JAVA

Member 1030559829-Sep-13 18:07

Member 10305598

29-Sep-13 18:07

Hi,

I want to implement SVM in Java. I have implemented svm in Matlab before but I am new to Java and I found a library LIBSVM which I can use. Is there any other library that I could use?

Thanks

Re: SVM implementation in JAVA

jschell30-Sep-13 8:33

jschell

30-Sep-13 8:33

Presumably what you want is to USE it in your code rather than "implement" (code yourself).

In that case google is the place to start.

Get & Set

Shuvo Sarker29-Sep-13 10:32

Shuvo Sarker

29-Sep-13 10:32

What are the basic deferences between Get & Set methods in Java?

Re: Get & Set

bryce29-Sep-13 13:14

bryce

29-Sep-13 13:14

this sounds like homework questions to me

MCAD
---

Re: Get & Set

Richard MacCutchan29-Sep-13 21:18

Richard MacCutchan

29-Sep-13 21:18

The same as they are in any language, and a read of the documantation or a search[^] would easily find the answer for you.

Veni, vidi, abiit domum

Re: Get & Set

Logical9416-Oct-13 19:07

Logical94

16-Oct-13 19:07

In Java, one typically tries to avoid having all data structures set as public.
So if it is set to private, getters are a way to access that data value, as the variable may be private, but the getter is public.

Same with setters, if you are trying to modify the value of the variable through another class, and if the variable is private to one class, then a public setter method can modify that value effectively.

Getting value from an eventListener?

KatsuneShinsengumi28-Sep-13 3:31

KatsuneShinsengumi

28-Sep-13 3:31

Hey guys,

I'm trying to learn java and I've got stuck on this problem.

I made a program with GUI that when I input on a text field and press enter it will display the value that was entered on a separate JOptionPane dialog box.

I'm trying to combine 2 inputs before displaying them but I cant find the code that will do the trick, here is the code I think I need to change:

/*If the item1 receives a value of 300 the JOptionPane will display the message Field 1: 300 and if the item2 receives a value of 1000 the JOptionPane will display the message Field 2: 1000 but will happen in different JOptionPane Box once pressed enter*/

if (eventHand.getSource()==item1)
                string = String.format("Field 1: %s",eventHand.getActionCommand());


if (eventHand.getSource()==item2)
                string = String.format("Field 2: %s",eventHand.getActionCommand());

JOptionPane.showMessageDialog(null,"" +string);

the value is stored on the variable named string, I'm looking for a way store the 2 value on each variable first then display it on the same messagebox.

Thanks,

Re: Getting value from an eventListener?

Richard MacCutchan28-Sep-13 6:46

Richard MacCutchan

28-Sep-13 6:46

Something like:

Java

if (eventHand.getSource()==item1) {
    string.concat("Field 1: ");
    string.concat(eventHand.getActionCommand());
    string.concat(", Field 2: ");
    string.concat(item2.Text);
}

if (eventHand.getSource()==item2) {
    string.concat("Field 1: ");
    string.concat(item1.Text);
    string.concat(", Field 2: ");
    string.concat(eventHand.getActionCommand());
}
JOptionPane.showMessageDialog(null, string);

Veni, vidi, abiit domum

Re: Getting value from an eventListener?

KatsuneShinsengumi28-Sep-13 18:47

KatsuneShinsengumi

28-Sep-13 18:47

Hi,

"Text" part of this (item2.Text); is not working but I think I can handle this already.
also adding a dedicated button also helps me to think it in an organized way.

Thanks,

Re: Getting value from an eventListener?

Richard MacCutchan28-Sep-13 21:19

Richard MacCutchan

28-Sep-13 21:19

KatsuneShinsengumi wrote:
"Text" part of this (item2.Text);

Since I did not know what type of object item2 was, I had to make a guess.

Veni, vidi, abiit domum

Re: Getting value from an eventListener?

KatsuneShinsengumi28-Sep-13 21:26

KatsuneShinsengumi

28-Sep-13 21:26

Yeah thanks, no problem there,.

tell me java code

Member 1030137427-Sep-13 9:30

Member 10301374

27-Sep-13 9:30

1) GenK-tree algorithm,

2) algorithm for inclusion-exclusion principle.

how to implement these two algorithms using JGraphT (java language).

plz help me...

Re: tell me java code

NotPolitcallyCorrect27-Sep-13 9:36

NotPolitcallyCorrect

27-Sep-13 9:36

http://www.bing.com/search?q=java+Gene-tree+algorithm[^]
http://www.bing.com/search?q=java+inclusion-exclusion[^]

Neper number

parisa6821-Sep-13 5:23

parisa68

21-Sep-13 5:23

hi,
how can i generate or use neper number in java.
i want to write a function that do uniform distribution.
thanks,

Re: Neper number

Richard MacCutchan21-Sep-13 5:56

Richard MacCutchan

21-Sep-13 5:56

See https://www.google.com/search?q=neper+number+in+java[^].

Veni, vidi, abiit domum

Re: Neper number

parisa6821-Sep-13 6:05

parisa68

21-Sep-13 6:05

thanks,

Re: Neper number

sep_exambo23-Sep-13 15:40

sep_exambo

23-Sep-13 15:40

why you choose neper number to solve uniform distribution ?

why don't you choose -> mid point numeric to solve that ?

you can see this articel :

http://www.damtp.cam.ac.uk/lab/people/sd/lectures/nummeth98/integration.htm[^]
http://blog.wolframalpha.com/2013/07/11/numerical-methods-integration/[^]

1) GenK-tree algorithm, 2) algorithm for > > inclusion-exclusion Using JGraphT ( Java Code)

Mithun Suthar20-Sep-13 2:18

Mithun Suthar

20-Sep-13 2:18

Hi Expert,

Can any 1 Help me how to develop the given algorithm in Java using JgraphT

1) GenK-tree algorithm
2) inclusion-exclusion algorithm

I need help regarding develop these above algorithm in Java with code and any tutorial or any same project or algorithm in Java so i can help from then and complete the above task

For reference follow the below link

1) http://jgrapht.org/[^]

2) http://jgrapht.org/visualizations.html[^]

Please help me to develop the application like above reference in Java

Thanks & Regards,
Mithun
mit_pnch86@yahoo.in

Re: 1) GenK-tree algorithm, 2) algorithm for > > inclusion-exclusion Using JGraphT ( Java Code)

Richard MacCutchan20-Sep-13 3:21

Richard MacCutchan

20-Sep-13 3:21

Please read http://www.codeproject.com/Messages/3137511/Forum-Guidelines-PLEASE-READ.aspx[^], especially point 2.

Veni, vidi, abiit domum

Re: 1) GenK-tree algorithm, 2) algorithm for > > inclusion-exclusion Using JGraphT ( Java Code)

Mithun Suthar20-Sep-13 5:14

Mithun Suthar

20-Sep-13 5:14

Sorry...

but this is my first post in CodeProject but next time i will be careful with your Forum.....

Thanks,
Mithun

java collection

parisa6819-Sep-13 21:52

parisa68

19-Sep-13 21:52

i want to save a message structure and it's score to a data structure. but some of data structures are repetitious.i want to use two dimensional collection with duplicate key which collection can help me?
thanks,

Re: java collection

Richard MacCutchan19-Sep-13 23:21

Richard MacCutchan

19-Sep-13 23:21

It's difficult to know which one is best for you, but the Collections tutorial[^] has some good information.

Veni, vidi, abiit domum

Re: java collection

Mohini J.2-Oct-13 3:05

Mohini J.

2-Oct-13 3:05

To solve this you can map to every message ID as key to a list of values.
Like : Map<string, list<string="">>

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.