Drawing a Christmas tree w/ nested for loops and from JavaScript to Java

I need help in making this code compatible with Java (I use BlueJ):
It's JavaScript...
Thanks in advance!
<HTML>
<BODY>
<CENTER>
<SCRIPT>
var width=1;
for (i=0; i <= 5 ; i++)
for (x=0; x<=4; x++)
for (y=1; y<=width; y++)
var Number=Math.random()*10;
var Ornament=Math.round(Number);
if (Ornament<=1)
document.write("O");
if (Ornament>=2)
document.write(" X");
document.write("<BR>");
width=width+1;
width=width-2;
</SCRIPT>
</CENTER>
</BODY>
</HTML>

What do you mean "compatible with Java"? Java doesn't enter into this at all.
Are you asking how to translate this code to Java?
If so, where you have "<BR>", you'll want a println rather than a print (as in System.out.print).
The second tricky part is centering. The browser handled that for you here.
You'll have to either do it yourself, or find another Java API tool to do it for you.
If I were you I'd look at the API docs for PrintStream.format(), I think it is. It's possible that the %s conversion has a "center" option. Or maybe something else there does.
If there is no textual centering tool, you can build one yourself by using StringBuffer or StringBuilder and padding with spaces, I guess.
Otherwise it should map across pretty easily.

Similar Messages

I need to take elements from within 2 nested for loops and place them in an array at the specific row and column that I need.

I have tried intializing an array and replacing elements by specifying a particular row, and column, but in the end I get an array with only one element replaced, and I suspect that it is because as the for loops are running through their iterations each time the array is re-initializing. I have a simple vi that I will post below, it is not the exact situation that I have but is a good place for me to get some understanding. I have the row and column indexes being driven by the inner and outer loop iterations, which gives me the pattern I need. I am using the inner iterations as array elements. How do I set this up so that it works and d
oes keep re-initializing my array.
Attachments:
Untitled.vi ‏26 KB

I have fixed a number of things in your vi.
You were right in thinking that the array was continuously re-initialized. To avoid this, use a shift register (right-click the loop border), which will pass the updated array into the next iteration.
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...
Attachments:
your_vi.vi.zip ‏13 KB

Interrupting Nested For Loops/Sequences

I have a lagre program consisting of nested for loops and case statements calibrating an array of patch antennas. The entire process of which will take about 15 hours. During this time, I want to have two things happen.
Every 20 minuites or so, I want the process to stop what it's doing, follow certain commands for the measurement equipment to recalibrate itself, and then go back to what it was doing.
I also want to protect it against unpredicted and predicted crashes. If the system needs to stop for whatever reason, I would like to be able to pick up the process where it left off. A sort of checkpoint system, where, when it passes a checkpoint, if it needs to be restarted, I can tell it to start from the last checkpoint it passed.
Anyone had any experiece with these types of problems?

jaysmall wrote:
I also want to protect it against unpredicted and predicted crashes. If the system needs to stop for whatever reason, I would like to be able to pick up the process where it left off. A sort of checkpoint system, where, when it passes a checkpoint, if it needs to be restarted, I can tell it to start from the last checkpoint it passed.
Could you open and append parameters to a file? Every time you restart execution of the vi after crashes you can look through the contents of the file to determine the last operation that was successful and continue with the last know good settings. -SS

Issues with nested for loops - saving images from a camera

Hi all,
I've written a vi. to capture a specific number of images ('Image No') and save these images, outputted to a folder of my choice. Each image is identified sequentially. However, I wish to do a number of iterations ('Run') of this capture sequence, such that the filename of each image would be 'Filename (Run)_(Image No).png', e.g. run 5, image 10 would be 'Filename 5_10.png'. I have tried a nested for loop for this but I receive an error 'Asynchronous I/O operation in progress' (I've attached a printscreen).
Can anyone assist me in solving this problem? I preiously posted this in machine Vision but got no response (http://forums.ni.com/t5/Machine-Vision/Capturing-image-sequences-issues-with-nested-for-loops/m-p/19...). Please find attached my vi.
Kindest regards and thanks,
Miika
Solved!
Go to Solution.
Attachments:
Labview problem.jpg ‏3841 KB
Image sequence save to file.vi ‏48 KB

Miika,
the problem is not the filenam, but the name of the folder (AHHHHH!). You try to create the same folder in the outer for loop over and over again.... (it is the error message above the '======', not below )
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

Nested for loop in Xquery

hi all,
I need to implement nested for loop in Xquery, but not able to do. Please help.
Thanks in advance..
Rajan

Nested for loops are simple in Xquery. Here is a very basic example:
Input:
<root>
<FirstLevel>
     <SecondLevel>
          <Value>1</Value>
     </SecondLevel>
     <SecondLevel>
          <Value>2</Value>
     </SecondLevel>
     <SecondLevel>
          <Value>3</Value>
     </SecondLevel>
</FirstLevel>
<FirstLevel>
     <SecondLevel>
          <Value>4</Value>
     </SecondLevel>
     <SecondLevel>
          <Value>5</Value>
     </SecondLevel>
     <SecondLevel>
          <Value>6</Value>
     </SecondLevel>
</FirstLevel>
</root>XQuery:
declare namespace ns0 = "http://temp.uri/OTM";
declare function ns0:NestedForLoop($input as element(*))    as element(*)
     <ns0:Output>
          for $firstLevel in $input/FirstLevel
          for $secondLevel in $firstLevel/SecondLevel
                return
              <element>{ $secondLevel/Value/text() }</element>
     </ns0:Output>
declare variable $input aselement(*) external;
ns0:NestedForLoop($input)Output:
<otm:Output      xmlns:otm="http://temp.uri/OTM">
     <element>1</element>
     <element>2</element>
     <element>3</element>
     <element>4</element>
     <element>5</element>
     <element>6</element>
</otm:Output>Of course, this case is very simple and usually you wont even loop for this you can use a simple XPath like $input/FirstLevel/SecondLevel/Value/text() to achieve the above result. So, If you are having problems in a specific case of nested for loops, please post the input and output here and we can help out.

Nested For Loop Trouble?

Ok I need to have a nested for loop that asks a user to enter in a int number from 1-50. Whatever the number is, lets say 4 I need the program to count up asterisk and count down asterisks, like this.
This is my code:
import java.io.*;
public class Stars {
     static int n;
     static private InputStreamReader in = new InputStreamReader(System.in);
     static private BufferedReader br = new BufferedReader(in);
     public static void main(String[] Args)throws IOException
          System.out.println("Please enter in a number to see display: ");
          String num = br.readLine();
          n=Integer.parseInt(num);
          for(int i=1;i<=n;i++)
               for(int j=1;j<=i;j++)
                    System.out.print("*");
               for(int j=1;j<=i;j--)
                    System.out.print("*");
               System.out.println();
Can someone tell me what I am doing wrong so I can figure out my mistake(s).

Ok, well I know that the loop relies on the number entered in by the user. So if i pick 3 the three enter in the loop and counts up in a for loop and for every number it counts up to the three it does a print("*"); Now what I am getting confused about is where the other for loop comes into play. I know that I need to start from the number I have which is 3, so I need to have one less than that and then count down. The thing is that i'm not sure where or how the second for loop gets implemented into the code. Does it get nested with the first loop like this:
for(int i=1;i<=n;i++)
               for(int j=1;j<=i;j++)
                        for(int j=n-1;j>=i;j--)
                    System.out.print("*");
               System.out.println();
          }Or is the second for loop on its own like this:
for(int i=1;i<=n;i++)
               for(int j=1;j<=i;j++)
                    System.out.print("*");
               for(int j=n-1;j>=i;j--)
                    System.out.print("*");
               System.out.println();
          }If someone can help me understand, for this is my first time with nested for loops.

Multiplication Table with Two Nested For Loops

I am trying to code a multiplication table in which the user enters the number of rows between 2 and 10 and enters the number of columns from 2 to 10. This must be in nested for loop format somewhat like this:
rows has been assigned the input variable for rows and columns is the name for input value for columns
for (int i = 1; i <=rows; i++)
for (int j = 1; j <=columns; j++)
i * j
i can't figure out how to get it to print out in table format or if the calculation coding is correct. can anyone help me please?
it should look like this for rows is 4 and columns is 7
1 2 3 4 5 6 7
2 4 6 8 10 12 14
3 6 9 12 15 18 21
4 8 12 16 20 24 28
Edited by: hatecodingsomuch on Feb 22, 2009 8:15 PM

hatecodingsomuch wrote:
I refuse to ask for help from people who are acting like they are all-knowing and unwilling to help someone, considering I am asking for help...to learn. Obviously I am not understanding java very well and I don't need to be ridiculed like this from members who are supposed to help "NEW TO JAVA" individuals. Get off your high horse or get off the website. I will never use this again.Good luck with that.
You do seem to be yet another "do my homework for me" type of flunkie. I predict you'll soon have an epiphany that software development really isn't for you.
I hope you know how to say "Do you want fries with that, sir?" better than the next guy so you can edge him out.

Nested for loops

Sorry to bother you all, but I have a small problem with my java homework.
I have to make a nested for loop to produce the following output:
00
10 11
20 21 22
30 31 32 33
(only goes from 0 to 3)
Now, all I have managed to do are two simple loops, one with increment 10 and the other with increment just ++.
Could you help me?

Think through this logically. You need two loops. You need this output:
00
10 11
20 21 22
30 31 32 33
Each number above has two digits (two digits, two loops...not a coincidence). So you need one loop to control the first digit, and another loop to control the second digit. Look at the values for the first digit: 0,1,2,3. Those are your first loop values. Now, each time the first loop has a value, your second loop goes through all of its values. Here's the values you need:
First iteration:
loop index 1: 0
loop index 2: 0
Second iteration:
loop index 1: 1
loop index 2: 0,1
Third Iteration:
loop index 1: 2
loop index 2: 0,1,2
Fourth Iteration:
loop index 1: 3
loop index 2: 0,1,2,3
Notice the pattern for loop 2? Look at the starting value for each iteration, and notice the ending value. That gives you your loop constraints.

Nested for loops error

Hi all Community members,, I am facing problem with pulling attributes from a xml which I have created. I am using nested for loop. Please kindly help me out to solve this problem....
Thanks in advance...
Below is the code & xml ...
import flash.events.Event;
import flash.events.EventDispatcher;
import flash.events.*;
import flash.net.*;
var myXML:XML;
var voiceOver:String;
var startOffset:Number;
var slideData:Array;
var id_cont_array:Array = new Array();
var id_textfield_array:Array = new Array();
var id_image_array:Array = new Array();
var myXML_Container_Length:Number;
var myXML_textField_Length:Number;
var myXML_images_Length:Number;
var loader:URLLoader = new URLLoader();
loader.load(new URLRequest("dynamic.xml"));
loader.addEventListener(Event.COMPLETE,processXML);
function processXML(e:Event):void
slideData=new Array();
myXML = new XML(loader.data);
loader.removeEventListener(Event.COMPLETE, processXML);
loader.removeEventListener(IOErrorEvent.IO_ERROR, loadError);
myXML = new XML(e.target.data);
voiceOver = myXML. @ voice_over;
startOffset = myXML. @ start_offset;
for (var i : uint = 0; i<myXML.*.length(); i++)
//trace(myXML + "slide");
//myXML_List = myXML.children();
myXML_Container_Length = myXML.children().length();
//trace(myXML_Container_Length+ "==myXML_Container_Length")
//myXML_textField_Length = myXML.containerss[0].children().length();
//myXML_images_Length = myXML.children().length();
//trace(myXML.child("containerss")[3]. @ id.toXMLString()+ "==myXML.containerss[0]. @ id;");
//trace(myXML.containerss[0].textfield[0]. @ id+ "==myXML.slide.containerss[0]. @ id");
//trace(myXML.containerss[0].textfield[1]. @ id+ "==myXML.slide.containerss[1]. @ id");
//trace(myXML.containerss[3].image[0]. @ id + "==image[0]");
//trace(myXML.containerss[0].children() + "==myXML.containerss[0].children()");
for (var j:Number=0; j<=myXML_Container_Length; j++)
id_cont_array.push(myXML.containerss[j]. @ id);
//trace(myXML.containerss[j].children().length() + "==j");
myXML_textField_Length = myXML.containerss[j].children().length();
trace(myXML_textField_Length + "==myXML_textField_Length");
for (var k:Number=0; k<=myXML_textField_Length-1; k++)
   id_textfield_array.push(myXML.containerss[j].textfield[k]. @ id);
   //id_image_array.push(myXML.containerss[k].image[j]. @ id);
   trace(id_textfield_array[k] + "==id_textfield_array[k]==" + k + "---j==" + j);
   //trace(id_image_array[k] + "==id_image_array");
//trace(id_textfield_array[j]+"==id_cont_array[j]");
//trace(myXML_List.length() + "===myXML_List");
function loadError(e:IOErrorEvent):void
trace("loadError");
/// XML is as given below..
<slide orientation="VERTICAL" voice_over="Slide1.mp3" start_offset="0" margin="">
<containerss id="0" orientation="HORIZONTAL" padding="10" margin="10" x="10" y="160" width="200" height="150">
<textfield id="Text1" text="textfieldText1" padding="10" margin="10" x="10" y="160"/>
<image id="img1" text="" padding="10" margin="10" x="10" y="160"/>
<textfield id="Text2" text="textfieldText2" padding="10" margin="10" x="10" y="160"/>
</containerss>
<containerss id="1" orientation="HORIZONTAL" padding="10" margin="10" width="200" height="200" x="10" y="160">
<textfield id="Text3" text="textfieldText3" padding="10" margin="10" x="10" y="160"/>
<image id="img2" text="" padding="10" margin="10" x="10" y="160"/>
</containerss>
<containerss id="2" orientation="VERTICAL" padding="10" margin="10" width="200" height="150" x="10" y="160">
<textfield id="Text5" text="textfieldText5" padding="10" margin="10" width="200" height="150" x="10" y="160"/>
<image id="img3" text="" padding="10" margin="10" x="10" y="160"/>
<textfield id="Text6" text="textfieldText6" padding="10" margin="10" x="10" y="160"/>
</containerss>
<containerss id="4" orientation="VERTICAL" padding="10" margin="10" width="200" height="150" x="10" y="160">
<textfield id="Text7" text="textfieldText7" padding="10" margin="10" width="200" height="150" x="10" y="160"/>
<image id="img4" text="" padding="10" margin="10" x="10" y="160"/>
<textfield id="Text8" text="textfieldText8" padding="10" margin="10" width="200" height="150" x="10" y="160"/>
</containerss>
</slide>

Parsing is totally wrong. You function processXML() should be like that:
function processXML(e:Event):void
          slideData = new Array();
          loader.removeEventListener(Event.COMPLETE, processXML);
          loader.removeEventListener(IOErrorEvent.IO_ERROR, loadError);
          myXML = new XML(e.target.data);
          voiceOver = myXML.@voice_over;
          startOffset = myXML.@start_offset;
          myXML_Container_Length = myXML.children().length();
          var node:XMLList;
          for (var j:Number = 0; j <= myXML_Container_Length - 1; j++)
                    id_cont_array.push(myXML.containerss[j].@id);
                    node = myXML.containerss[j].children();
                    myXML_textField_Length = node.length();
                    for (var k:Number = 0; k <= myXML_textField_Length - 1; k++)
                              switch (node[k].name().toString())
                                        case "textfield":
                                                  trace(node[k].@id);
                                                  id_textfield_array.push(node[k].@id);
                                                  break;
                                        case "image":
                                                  id_image_array.push(node.@id);
                                                  break;

Capturing image sequences - issues with nested for loops

Hi all,
I've written a vi. to capture a specific number of images ('Image No') and save these images, outputted to a folder of my choice. Each image is identified sequentially. However, I wish to do a number of iterations ('Run') of this capture sequence, such that the filename of each image would be 'Filename (Run)_(Image No).png', e.g. run 5, image 10 would be 'Filename 5_10.png'. I have tried a nested for loop for this but I receive an error 'Asynchronous I/O operation in progress' (I've attached a printscreen).
Can anyone assist me in solving this problem? Please find attached my vi.
Kindest regards and thanks,
Miika
Solved!
Go to Solution.
Attachments:
Image sequence save to file.vi ‏48 KB
Labview problem.jpg ‏3841 KB

Hi,
You cannot create a folder if this one is already existing.
Just check that the folder exists before creating it.
Regards

Example code for each and every class in java API

hi,
Is there any place where i can get example code for eacha and every class in java API.
for eample...if i wanna find sample codes for all the clases in java.lang.*
please let me know ASAP.
thanks in advance

Crossposted here: http://forum.java.sun.com/thread.jsp?thread=570264&forum=54&message=2820774

Node removing in a Tree, for loop, and Enumeration

Hi there
it should be pretty easy, however i'm stuck with this code:
public void supprNode(DefaultMutableTreeNode node){
for(en = node.preorderEnumeration();e.hasMoreElements();){
DefaultMutableTreeNode tmpNode= (DefaultMutableTreeNode) en.nexElement();
if (tmpNode instanceof myderivedNodeClass)
tmpNode.doSomething();
if(!tmpNode.isRoot())
removeNodeFromParent(tmpNode);
}The problem is, the for loop doesn't traverse all the elements. That's if i call removeNodeFromParent. Is the enumeration updated twice?
ie if my tree is
root
-1
-2
-3after the call of supprNode(root) i get:
root
-2And i really don't understand why.

Hi!
If you look at the apidoc of DefaultMutableTreeNode.preorderEnumeration() you will see following text:
* Modifying the tree by inserting, removing, or moving a node invalidates
* any enumerations created before the modification.
So you should copy the elements of the enumeration in a separate list and iterate then over this list!
With kind regard,
Mathias

Nested for loop

hello
how can i implement this code in labview. i am new to labview, so plz if u design a vi of this code.
for i=1:m
c = (i-m/2);
for j=1:n
d = (j-n/2);
N1(i,j)=exp(-(c^2+d^2)/c1^2);
end
end
wher m is num of rows and n is number of column and c1 is a constant
thnx
kitty

Here's a quick framework for you to start with. I left out most of the math.
Some things to notice:
The i terminal starts with 0 and counts up for each iteration. Since you want your math to start with 1, you need to increment.
See the autoindexing out of the FOR loops? That's what is building up your 2D array.
Since you claim to be new, you might want to check out some of the online tutorials.
LabVIEW Basics
LabVIEW 101
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines
Attachments:
Nested loop.png ‏13 KB

Nested for loop in the collections

Hi Experts,
collection1
============
SELECT o.object_id
      BULK COLLECT INTO l_obj_info
        FROM (SELECT     n.node_id, n.object_id
                    FROM nodes n
              START WITH n.node_id = 100
              CONNECT BY PRIOR n.node_id = n.parent_node_id) n
             INNER JOIN
             objects o ON n.object_id = o.object_id
       WHERE o.object_type_id = 285;
collection2
============
SELECT *
      BULK COLLECT INTO l_tab
        FROM ((SELECT     REGEXP_SUBSTR (i_l_text, '[^,]+', 1, LEVEL)
                     FROM DUAL
               CONNECT BY REGEXP_SUBSTR (i_l_text, '[^,]+', 1, LEVEL) IS NOT NULL));
   END;
collection3
============
SELECT o.object_id
               BULK COLLECT INTO l_fin_tab
                 FROM objects o JOIN ATTRIBUTES att
                      ON o.object_id = att.object_id
                WHERE o.object_id = collection1.object_id
                  --AND att.VALUE = collection2.val;
Please tell me how to implement for loop in the collection3 to get the values from collection1 and collection2.
i have tried in the below way
CREATE OR REPLACE TYPE LIST_OF_ATTRIBUTES_TYPE AS TABLE OF varchar2(4000);
CREATE OR REPLACE TYPE LIST_OF_OBJECT_IDS_TYPE AS TABLE OF number(9);
CREATE OR REPLACE FUNCTION f_get_objects_by_type_id (
   i_object_type_id   IN   NUMBER,
   i_l_text           IN   VARCHAR2,
   i_scope_node_id         NUMBER
   RETURN list_of_object_ids_type
AS
   CURSOR objs_info
   IS
      SELECT o.object_id
        FROM (SELECT     n.node_id, n.object_id
                    FROM nodes n
              START WITH n.node_id = i_scope_node_id
              CONNECT BY PRIOR n.node_id = n.parent_node_id) n
             INNER JOIN
             objects o ON n.object_id = o.object_id
       WHERE o.object_type_id = i_object_type_id;
   l_tab       list_of_attributes_type := list_of_attributes_type ();
   --l_obj_info   list_of_object_ids_type := list_of_object_ids_type ();
   l_fin_tab   list_of_object_ids_type := list_of_object_ids_type ();
BEGIN
   BEGIN
      SELECT *
      BULK COLLECT INTO l_tab
        FROM ((SELECT     trREGEXP_SUBSTR (i_l_text, '[^,]+', 1, LEVEL)
                     FROM DUAL
               CONNECT BY REGEXP_SUBSTR (i_l_text, '[^,]+', 1, LEVEL) IS NOT NULL));
   END;
   IF l_tab.COUNT > 0
   THEN
      FOR i IN objs_info
      LOOP
         FOR j IN l_tab.FIRST .. l_tab.LAST
         LOOP
            SELECT o.object_id
            BULK COLLECT INTO l_fin_tab
              FROM objects o JOIN ATTRIBUTES att ON o.object_id =
                                                                 att.object_id
             WHERE
                            att.VALUE = l_tab (j) and o.object_id =objs_info(i);
         END LOOP;
      END LOOP;
   END IF;
   RETURN l_fin_tab;
END f_get_objects_by_type_id;

Why are you wanting to do this?
It looks like you are trying to implement SQL joins in PL code. Not only is that using up expensive PGA memory by storing the data in collections, but doing such retrieval of data to try and join it in PL loops, is never going to be as fast as just joining the SQL queries using SQL itself.
Post some example data and your database version, with an example of what the output should look like from that example data.
Re: 2. How do I ask a question on the forums?

Nested for loop logic

I am trying to create a triangle with for loop. i wrote this codepublic class Test {
    public static void main(String[] args) {
        for(int x = 1; x <= 6; x++) {
            for(int y = 1; y <= (x*2-1); y++) {
                System.out.print("x");
           System.out.println("");
}and i got answer like this
x
xxx
xxxxx
xxxxxxx
xxxxxxxxx
xxxxxxxxxxx
but what i am trying to do is that will strat showing the results from the middle.
___X___
__XXX__
something like that. Need some explaination or hint what i am missing. (underscores are not part of my program:))
thanks

So since the spaces look right now, lets step through the plus loop
for(k = i; k <= i*2-1; k++)
                System.out.print("+"); First time starting to go through the loop i is 0.
So 0 is not <= -1 [0*2-1 = -1] so no pluses get printed on the first time through.
the second time starting to go through the loop i is 1.
So first time through 1 is <= 1 [1*2-1 = 1] so print a +.
Second time through 2 is not <= 1, so we end with just one +.
The third time starting the loop i is 2.
So first time through 2 is <= 3 [2*2-1 = 3] so print a +.
Second time through 3 is <= 3 so print another +.
Third time through 4 is not <= 3 so we end with just two +s.
Uh oh, we wanted three s not two s, where did we go wrong? Let's try one more and see if we can see it.
The fourth time starting i is 3.
So first time through 3 is <= 5 [3*2-1 = 5] so print a +.
Second time through 4 is <= 5 so print another +.
Third time through 5 is <= 5 so print another +.
Fourth time through 6 is not <= 5 so we end with just three +s.
Now we have a choice, we can get mad and start throwing stuff and screaming at the stupid computer for doing it all wrong, or we can realize the problem is somewhere in the code and we can find it and fix it.
What do you think?
JSG
EDIT: Note: you actually have two problems displayed here, both should be obvious but one is slightly hidden in the output until you fix the other. Both should have made themselves clear if you had done a simple step through yourself. As i demonstrated it is really easy to do and something you better get real good at if you want to be a good programmer.
Edited by: JustSomeGuy on Nov 24, 2008 11:22 AM

Drawing a Christmas tree w/ nested for loops and from JavaScript to Java

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