Java

28-Jul-09 5:51

I think that looks a pretty tidy and simple solution.
You have the class ToolTipTreeCellRenderer, so use it as the renderer for your trees. Decide on an interface for the tool tip text, make sure your nodes support and use it.

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

How to round

udch27-Jul-09 17:46

udch

27-Jul-09 17:46

How to round this 106.19999999999999 number like 106.20 by using java script?

Re: How to round

harold aptroot27-Jul-09 18:17

harold aptroot

27-Jul-09 18:17

udch wrote:
java script

That's not Java

Anyway you could just do Math.round[^](106.19999999999999 * 100) / 100

2D Image Animation

NazarHussain27-Jul-09 3:05

NazarHussain

27-Jul-09 3:05

Hi all,

I want to animate 2D images, specially face;

My scenario is i should draw contours of face around the image, on next key frame i should change the shapes of contour. When i animate i get the face in the image should animate accordingly.

It is something like morphing, but in morphing we have 2 images. In my scenario i have one image.

If i conclude i want some thing like this http://www.youtube.com/watch?v=ed_HAJGJfeQ[^]

I want to do it programatically, to create Talking Pictures.

I know you all guys are specialist into such kind of things. Please guide me how to full fill my scenario.

Thanks in advance.

Please do it as early as possible.

Nazar Hussain

Nagy Vilmos27-Jul-09 3:45

27-Jul-09 3:45

Identical question on the C# forum, could the two be related?

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

NazarHussain27-Jul-09 3:59

NazarHussain

27-Jul-09 3:59

I posted on two forums, so if any guru of Java or C# could help me.

Nagy Vilmos27-Jul-09 4:05

27-Jul-09 4:05

Is the question Java or C#? If one or other, then in belongs in just the one.

Cross posts are very distracting, as you can see, a lot of pouple go to multiple forums and seeing the same post is just not accepted.
Please, only post a question in the one, most relevant, place. if you are not sure you are posting in the righ forum, say so up front and you will be directed, politely, to the correct forum.

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

array string index [modified]

NazarHussain27-Jul-09 20:01

NazarHussain

27-Jul-09 20:01

Ok. Thanks for your guidance. I will never post same question on multiple forums.

Regards

Nazar

nuttynibbles25-Jul-09 1:03

nuttynibbles

25-Jul-09 1:03

hi, im new to java.

regarding string array, is there a way to do string index.??
example:

String[] arr = null;
arr["name"]="myname";
arr["age"]="myage";
arr["gender"]="mygender";

The reason to my question is because im creating a class user. the variables will be private. i would need to get and set these variables, therefore creating a set of get() and set() function for each variable. If i can do the above method, i would simply need one set of get() and set() function.

hope thats not too confusing.
Thanks.

modified on Saturday, July 25, 2009 7:12 AM

Re: array string index

Kujtim Hyseni25-Jul-09 1:29

25-Jul-09 1:29

Check this code, if convienent:

class Indexer{
	static int returnIndex(String inp)
	{
		int ret_val=-1;
		
		if(inp.equals("name")) ret_val=0;
		if(inp.equals("age")) ret_val=1;
		if(inp.equals("gender")) ret_val=2;
		
		return ret_val;
	}

	public static void main(String [] args){
		String[] arr = null;
		arr[returnIndex("name")]="myname";
		arr[returnIndex("age")]="myage";
		arr[returnIndex("gender")]="mygender";
	}
}

Kujtim

Re: array string index

fly90425-Jul-09 2:59

25-Jul-09 2:59

How will the keys be generic if he doesn't know the key strings to begin with?

Personaly I wold use a swicth, instead of multiple if statements, in returnIndex.

If at first you don't succeed, you're not Chuck Norris.

Re: array string index

fly90425-Jul-09 2:56

Efficient way of printing elements in Java?!

25-Jul-09 2:56

You will need to use Map[^]. Explanation[^].

If at first you don't succeed, you're not Chuck Norris.

Rajdeep.NET24-Jul-09 8:36

Rajdeep.NET

24-Jul-09 8:36

Hello Pals,

I've written a program which declares an array of size 3, initializes its elements and prints the elements. The program is as follows:

package Demo;
import java.io*;
public class A{
    public A(){}
    public static void main(String args[])throws IOException{
        int[] anArray=new int[3];
        anArray[0]=10;
        anArray[1]=20;
        anArray[2]=30;
        System.out.println("Array[0] index now contains: "+anArray[0]);
        System.out.println("Array[1] index now contains: "+anArray[1]);
        System.out.println("Array[2] index now contains: "+anArray[2]);
    }
}

Now, suppose the array size is very long say 100! Then, will I have to keep on typing System.out.println(anArray[0]......anArray[99]);???

Wont that be huge? I C#.NET, we have the for-each loop construct to print all the elements in an array. Similarly, can I implement the for-each loop here? I did try, but I get Error as this: missing .class

Can anyone help me with an effecient way of printing elements in Java?

Help will be greatly appreciated,
Rajdeep Big Grin | :-D

I calculate my days on earth..... approximately 55 years remaining for me to expire Wink | ;-)

Re: Efficient way of printing elements in Java?!

fly90424-Jul-09 8:42

Re: Efficient way of printing elements in Java?!

24-Jul-09 8:42

I take it that you still can't use google. Help[^].

If at first you don't succeed, you're not Chuck Norris.

Nagy Vilmos27-Jul-09 3:37

Re: Efficient way of printing elements in Java?!

27-Jul-09 3:37

You really don't have a clue, do you?

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

EliottA5-Aug-09 9:12

EliottA

5-Aug-09 9:12

I hate you.

Check out the CodeProject forum Guidelines[^]
The original soapbox 1.0 is back![^]

Run ruby code on java

xax24-Jul-09 6:15

xax

24-Jul-09 6:15

Is there a way to create and use a ruby object inside java code?
Thanks

Re: Run ruby code on java

Kujtim Hyseni25-Jul-09 0:59

25-Jul-09 0:59

Check this http://www.jruby.org/[^], since it is created with Java maybe Java can be invoked.

Reference in Java

Kujtim Hyseni24-Jul-09 5:32

24-Jul-09 5:32

Hello,

this is a simple question I think. I am trying to get the array of bytes as a reference from method, although in the method in creates the array, outside returns the original initialized with null. How to get it from routine, but as parameter since routine returns boolean. Maybe routine should return class containing the array and boolean variable.

This is the code:

public class PassingRefs{

	static boolean varbyteobject(byte [] obj)
	{
		System.out.println("---inside routine---");
		int rndlen=(int)(Math.round(Math.random()*50)+1);
		
		obj=new byte[rndlen];
		System.out.println(obj.length);
		
		return true;
	}

	public static void main(String [] args){
		byte [] inpobj=null;
		varbyteobject(inpobj);
		System.out.println("---out from routine---");
		System.out.println(inpobj.length);
	}

}

and this is what I get after execution:

---inside routine---
29
---out from routine---
Exception in thread "main" java.lang.NullPointerException
	at PassingRefs.main(PassingRefs.java:18)

Kujtim

David Skelly24-Jul-09 6:12

David Skelly

24-Jul-09 6:12

In Java, all method parameters are passed by value, not by reference.

In other words, when you call varbyteobject in your code, it does not pass the reference to the original byte array. It passes a copy of the reference to the byte array. So, this line of code:

obj=new byte[rndlen];

has no effect on the original reference to the byte array in the calling main method since you are updating the copy, not the original.

It is explained in more detail in this article:

http://www.javaworld.com/javaworld/javaqa/2000-05/03-qa-0526-pass.html[^]

You can just return the new byte array from your method. Why do you want to return a boolean?

fly90424-Jul-09 6:21

24-Jul-09 6:21

SPIRANCA wrote:

static boolean varbyteobject(byte [] obj)
{
    System.out.println("---inside routine---");
    int rndlen=(int)(Math.round(Math.random()*50)+1);

    obj=new byte[rndlen];
    System.out.println(obj.length);

    return true;
}

varbyteobject(inpobj);

Why do you need to return a boolean? Why not just pass the byte[] back?

Personally I would return an intialised byte[] if it was true and null if it was false.

static byte[] varbyteobject(byte[] obj)
{
    ...
    return obj;
}


//If varbyteobject doesn't return null (false).
if ((inpobj = varbyteobject(inpobj)) != null)
    System.out.println(inpobj.length);
else
    System.out.println("Array not initialised.");

If at first you don't succeed, you're not Chuck Norris.

Kujtim Hyseni24-Jul-09 7:02

24-Jul-09 7:02

Possible solution would be to return a struct-class(since Java doesn't supports structs), so that it contains the byte array and the boolean variable(which tells about success or failure). Although we could check the success or failure from the byte array-some of the byte contain that info.

Thanks anyway,
Kujtim

David Skelly26-Jul-09 22:35

David Skelly

26-Jul-09 22:35

Success or failure in what sense? Looking at the example code you have posted there is very little that can go wrong.

The convention in Java is that success of an operation like this is assumed and you can expect a byte array to be returned: if anything goes wrong and the operation cannot be completed successfully, an exception is thrown. This may be a checked or an unchecked exception. There is a lot of debate over which of these is better, and I have no desire to open that debate up here (we'll be here forever while people argue backwards and forwards). Lets just say that if the operation fails, an exception is thrown and the type of exception tells you what went wrong. The calling method then catches the exception and responds accordingly.

In other words, your method returns an intialised byte array. If the initialisation of the byte array fails, throw an exception indicating why it failed. I can't tell you what exception would be best because I don't know what you expect to go wrong from the example code you posted.

You certainly could make it work by returning a class containing the byte array and a success/failure flag but this is not the preferred way of doing it in Java.

Kujtim Hyseni27-Jul-09 1:38