String array indexing

Hello there,
Here's something i need help with.
I'm having a 2D string out of which I extract one colum as an array(1D) and i'm matching for a regular expression. For every match in this 1D array I need the element index to output the corresponding row in which the element is present in the 2D array.
Here's someting about the matching requirement:
The matching process should be such that, :
If i typed in , "d", it should give out all the element indexes starting from letter "d"
Thanks
Shaun

pk120 wrote:
I'm having a 2D string out of which I extract one colum as an array(1D) and i'm matching for a regular expression. For every match in this 1D array I need the element index to output the corresponding row in which the element is present in the 2D array.
Please clarify your requirements. Do you want the row index only for elements in the column where the match occurred or do you want all 2D indices that match in the entire array?
It is always best if you could attach a simple VI containing your 2D array e.g. as diagram constant or as default values in a control. Also create an indicator that contains the expected result as default value.
LabVIEW Champion . Do more with less code and in less time .

Similar Messages

Getting index of a string array based on user selection in a comboBox

I'm not really sure how to phrase my questions, but here goes.
I have created a string array that holds the values of a ComboBox. Based on which selection the user makes in the comboBox, I need the program to then perform particular calcualtions (based on their selection). I have tried using an ItemListener, but that doesn't seem to work. I've also tried using the ActionListener connected to the ComboBox, again...without results. I'm not sure what I'm looking for exactly, but I know what I want it to do, I'm just not finding the right way to do it. Can anyone help me figure this out?

Here is my entire code. I'm completely confused at where to put the ActionListener or how to make it do what I want. Right now I just have it set up to display a simple message in the displayArea, just so that I could see if it was working. I think once I figure out how to get the right index from the ComboBox array, then I'll be able to add the code I need to perform the calcualtions...it's just getting to that step that's not going so well! Any help is appreciated.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.text.DecimalFormat;
import java.lang.String;
public class MortCalcSR5 extends JFrame implements ActionListener
     int term = 0;
     double principal = 0;
     double rate = 0;
     double monthlyPyment = 0;
     double interest = 0;
     String[] loanChoices = {" ", "7 years @ 5.35%", "15 years @ 5.5%", "30 years @ 5.75%"};
     //create panel for input
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          JTextField mortAmtField = new JTextField(15);
          JLabel loanSelectionLabel = new JLabel("Loan Selection");
          JComboBox loanSelection = new JComboBox(loanChoices);
          JTextField loanSelected = new JTextField(15);
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     JPanel buttonPanel = new JPanel();
          JButton calcButton = new JButton("Calculate");
          JButton clearButton = new JButton("Clear");
          JButton exitButton = new JButton("Exit");
     //create panel for payment information
     JPanel paymentPanel = new JPanel();
          JLabel paymentLabel = new JLabel("Monthly Payment $");
          JTextField paymentField = new JTextField(15);
     //create panel for text box information
     JPanel textPanel = new JPanel();
          JLabel numPaymentLabel = new JLabel("Payment #");
          JLabel balLabel = new JLabel("Balance");
          JLabel ytdPrincLabel = new JLabel("Principal");
          JLabel ytdIntLabel = new JLabel("Interest");
     //create payment for display area
     JPanel displayPanel = new JPanel(new FlowLayout());
          JTextArea displayArea = new JTextArea(10,30);
          JScrollPane scroll = new JScrollPane(displayArea, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
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          //set size of GUI display
          setSize(400,450);
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          inputPanel.add(mortAmtField);
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          buttonPanel.add(exitButton);
          pane.add(buttonPanel);
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          calcButton.addActionListener(this);
          clearButton.addActionListener(this);
          exitButton.addActionListener(this);
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          paymentPanel.add(paymentLabel);
          paymentPanel.add(paymentField);
          pane.add(paymentPanel);
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          textPanel.add(ytdPrincLabel);
          textPanel.add(ytdIntLabel);
          pane.add(textPanel);
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          displayPanel.add(scroll);
          pane.add(displayPanel);
          setContentPane(pane);
          setVisible(true);
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          else
               displayArea.setText("blah");
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               paymentField.setText(null);
               displayArea.setText(null);
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               System.exit(0);
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          //perform the calculations
//          int mortAmt = Integer.parseInt(mortAmtField.getText());
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/*/calculations
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*/

Newbie trying to sort 2D string array

Dear all,
After read some book chapters, web sites including this, I still don't get the point.
If I have a file like,
1 aaa 213 0.9
3 cbb 514 0.1
2 abc 219 1.3
9 bbc 417 10.4
8 dee 887 2.1
9 bba 111 7.1
and I load into memory as a String[][]
here comes the problem, I sort by column 1 (aaa,...,bba) using an adaptation of the Quicksort algorithm for 2D arrays
* Sort for a 2D String array
* @param a an String 2D array
* @param column column to be sort
public static void sort(String[][] a, int column) throws Exception {
QuickSort(a, 0, a.length - 1, column);
/** Sort elements using QuickSort algorithm
static void QuickSort(String[][] a, int lo0, int hi0, int column) throws Exception {
int lo = lo0;
int hi = hi0;
int mid;
String mitad;
if ( hi0 > lo0) {
/* Arbitrarily establishing partition element as the midpoint of
* the array.
mid = ( lo0 + hi0 ) / 2 ;
mitad = a[mid][column];
// loop through the array until indices cross
while( lo <= hi ) {
/* find the first element that is greater than or equal to
* the partition element starting from the left Index.
while( ( lo < hi0 ) && ( a[lo][column].compareTo(mitad)<0))
++lo;
/* find an element that is smaller than or equal to
* the partition element starting from the right Index.
while( ( hi > lo0 ) && ( a[hi][column].compareTo(mitad)>0))
--hi;
// if the indexes have not crossed, swap
if( lo <= hi )
swap(a, lo, hi);
++lo;
--hi;
/* If the right index has not reached the left side of array
* must now sort the left partition.
if( lo0 < hi )
QuickSort( a, lo0, hi, column );
/* If the left index has not reached the right side of array
* must now sort the right partition.
if( lo < hi0 )
QuickSort( a, lo, hi0, column );
* swap 2D String column
private static void swap(String[][] array, int k1, int k2){
String[] temp = array[k1];
array[k1] = array[k2];
array[k2] = temp;
----- end of the code --------
if I call this from the main module like this
import MyUtil.*;
public class kaka
public static void main(String[] args) throws Exception
String[][]a = MyUtil.fileToArray("array.txt");
MyMatrix.printf(a);
System.out.println("");
MyMatrix.sort(a,1);
MyMatrix.printf(a);
System.out.println("");
MyMatrix.sort(a,3);
MyMatrix.printf(a);
for the first sorting I get
1 aaa 213 0.9
2 abc 219 1.3
9 bba 111 7.1
9 bbc 417 10.4
3 cbb 514 0.1
8 dee 887 2.1
(lexicographic)
but for the second one (column 3) I get
3 cbb 514 0.1
1 aaa 213 0.9
2 abc 219 1.3
9 bbc 417 10.4
8 dee 887 2.1
9 bba 111 7.1
this is not the order I want to apply to this sorting, I would like to create my own one. but or I can't or I don't know how to use a comparator on this case.
I don't know if I am rediscovering the wheel with my (Sort String[][], but I think that has be an easy way to sort arrays of arrays better than this one.
I've been trying to understand the Question of the week 106 (http://developer.java.sun.com/developer/qow/archive/106/) that sounds similar, and perfect for my case. But I don't know how to pass my arrays values to the class Fred().
Any help will be deeply appreciated
Thanks for your help and your attention
Pedro

public class StringArrayComparator implements Comparator {
int sortColumn = 0;
public int setSortColumn(c) { sortColumn = c; }
public int compareTo(Object o1, Object o2) {
    if (o1 == null && o2 == null)
      return 0;
    if (o1 == null)
      return -1;
    if (o2 == null)
      return 1;
    String[] s1 = (String[])o1;
    String[] s2 = (String[])o2;
    // I assume the elements at position sortColumn is
    // not null nor out of bounds.
    return s1[sortColumn].compareTo(s2[sortColumn]);
// Then you can use this to sort the 2D array:
Comparator comparator = new StringArrayComparator();
comparator.setSortColumn(0); // sort by first column
String[][] array = ...
Arrays.sort(array, comparator);I haven't tested the code, so there might be some compiler errors, or an error in the logic.

Help! Inserting a 1-D comment array into a 2-D string array at specified row AND column

Hello everyone,
I am writing a 2-D string array to excel and i need a way to add comments to my file like this:
SLAM NAME G Level Comments
1 RALF 26
1 RALF 26
1 RALF 26
1 RALF 26
For some reason, i cannot specify a row AND column to write because:
When i use replace array subset it only replaces 1 element at my index.
When i use replace array subset with a loop, it creates empty spaces until it reaches the end of the array it is replacing.
When i use Insert into array: i cannot wire 2 inputs for row and column.
In my complete VI i will need to write from row 1-1001, a different comment from 2-2002, a different comment from 3-3003, etc until a stop condition is met so i need to figure out how to do this programatically and not have it replace any elements outside of the range or it will override previous commetns.
I am at a loss of what to do. Any and all suggestions are greatly appreciated.
Thanks!
Solved!
Go to Solution.
Attachments:
array.vi ‏13 KB

Hi proph,
I made a small subtile change to yur VI and now it replaces all values of the 4th column…
THINK DATAFLOW!
Use shift registers when you need to propagate values from one loop iteration to the next!
USE/LEARN DEBUGGING TECHNIQUES!
There are tools like probes and highlight to understand your VI execution and to find problems…
Go through all those free online courses offered by NI!
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome
Attachments:
array.vit ‏12 KB

Int to string to string array

Sorry, if my question is too wordy.
First, the problem -- I am reading integers into my application and converting the those into strings using valueOf(). I then need to use those strings in a switch statment. The only way I could figure how to do this was to use the same String variable in each switch statement but change the the message to fit each case. My professor suggested I use an array list instead.
Second, the question -- how can I convert the String I have generated into a String Array and use the indexing of the array to correspond to the specific text for each case?
Thank you.

indeed, you can't use the switch mechanism on strings.
but, if the requirement is that you convert an integer into a string and then switch on those (I don't know why...) from an array of the values, swap the String value back into an int and switch from there.

Trying to setText on random JPanels via a String array?

My assignment is to create a bunch of JButtons, and randomly have an "X" appear on one, until it is clicked, and then it goes away and reappears on another random one. It does this ten times and displays the time it took to do so.
I've created all the JButtons, named b01 to b48 and put them in a gridLayout. That part works fine.
I created a String[] array with the 48 names of the JButtons in it, then I was thinking I could go this route...
Random r = new Random();
String random = panels[r.nextInt(panels.length)];
random.setText("X"); //This is where the program hangs up.I can replace the setText statement with a System.out.println statement, and it shows up on the console correctly...

Brandon,
Have a chook at my minesweeper game at http://forum.java.sun.com/thread.jspa?forumID=54&threadID=5248903 ... it uses a matrix of cells[rows][cols]... each Cell is a JPanel which contains a Button.
I think you'll end up with something like ...
// create an array of Buttons
Button buttons[] = Button[NUM_BUTTONS];
for (int i=0; i<NUM_BUTTONS; i++) {
buttons[] = new Button(i);
// Xify a random button for a random time
buttons[random.nextInt(NUM_BUTTONS)].xify()I'd create a:
class Button extends JButton
* provides a constructor(int index) which sizes and places the button according to it's index
* provides an "xify" method, which setText("X"), then sets-up a SwingTimer to setText(null) after a random time.
Cheers. Keith.

Combining string array elements into one string

Right, I have an string array called str which stores 1 character in each of its 16 elements. It gets this character from another array, strArray. Now, what I want to be able to do is to take all 16 elements and combine them into one string called keyString. Using the code below keyString only prints out the last character. The code is shown below:
for (x=0; x<16; x++) {
     str = new String[16];
     str[x] = "";
     str[x] += (strArray[(index+x)%16].charAt(strChar[x]));
     keyString = str[x];
       System.out.print(keyString);
}Any help would be very much appreciated.
Edited by: Paragon96 on May 20, 2008 7:32 AM

your logic is wrong ; if you want to concatenate the content of the array, you have to loop (what you did), and concatenate keyString for each index, meaning:
keyString += str[x];you can also use a StringBuilder for such kind of operations

Returning String Array

I'm trying to create a function (method?) for parsing some log files. The first index of the string array I want returned will contain a 'key' on what I'm doing with the log files (since they'll be formatted in several different ways depending on what's happening) and the rest will just return tokens from the logs. Here's what I have so far:
    public static String[] parseLog(String inString){
        StringTokenizer st = new StringTokenizer(inString, "\"<>");
        int stNum = st.countTokens();
        String[] parsedOut = new String[stNum + 1];
        if (inString.contains("disconnected")) {
            parsedOut[0] = "read";
        for (int x = 1; st.hasMoreTokens() ; x++){
            parsedOut[x] = st.nextToken().trim();
        return parsedOut;
    public static void main(String[] args) {
        String line = "????log L 08/15/2008 - 20:28:37: \"underTHEinfluence johnRAMBO<16><STEAM_0:0:204495><>\" disconnected";
        System.out.println("Parsed: " + parseLog(line));
    }{code}
It compiles with no errors, but I'm getting this: Parsed: [Ljava.lang.String;@e09713
Edited by: mr0ldie on Aug 16, 2008 1:37 PM

prometheuzz wrote:
A String representation of the array is given, while you want to display the individual items from the array.
Try this:
System.out.println(java.util.Arrays.toString(yourArray));
Need closures - want to do mapchar(yourarray, System.out.println);
:)

Dynamic string array

I need to make a dynamic string array.
Deeper explanation:
I am trying to use a FOR loop to send a series of commands to an 8-channel device. Each channel requires 7 (actually, 1/2 need only 5, the other 1/2 need 7) strings to set them up and the entire sequence needs to be performed 8 times. I started a test .vi by simply using a constant array of type sting. I can sequentially pick each string and program my device perfectly. Now I'd like to do things like add the channel # somewhere in the mix, use variable values based on other controls in my .vi to set the parameters of the channel.
EXAMPLE:
The user sets certain values that determine delays and width for an 8-channel DDG (Digital Delay Generator, to some, a pulse generator). These values then need to be loaded into the DDG. The Strings will look something like this:
ULSE1TATE 1
ULSE1:WIDTH 0.009 000 *NOTEpaces behind decimal are for better viewability only
ULSE1ELAY 0.000 000
ULSE1YNC T0
ULSE1:CMODE DUTY
ULSE1COUNTER 1
ULSE1:BCOUNTER 1
ULSE2TATE 1
ULSE2:WIDTH 0.000 300
ULSE2ELAY 0.008 700
ULSE2YNC T0
ULSE2:CMODE NORMAL
So widith and delay params change, the pulse# changes, and whether it's on certain channels decides if the mode is duty or normal and duty comes with the subsequent params pcount and bcount.
help?
PS - I am going to move the state, sync, and cmode to a common, initialize loop run only at program start, but I still need to use width, delay, and (variably) pcount and bcount.
PPS - I am trying to edit post to diable smilies. Commands should read:"colon, P (or D)" not ,
PPPS - Success, at least for me. I disabled smilies in my settings, I don't know if that means my posts won't show smilies or if just what I am looking at won't show smilies, any responders let me know how it's showing for you.
Message Edited by Radiance_Jon on 07-16-2007 01:48 PM
Message Edited by Radiance_Jon on 07-16-2007 01:52 PM

smercurio_fc wrote:
Well, in my experience I have found that dealing with errors early on is the best course of action as it leads to less headaches down the road...
Auto-indexing is one of the more powerful features of LabVIEW. If you're familiar with text-based languages it's equivalent to the "foreach" statement. Basically it allows you to wire an array into a for-loop and the size of the array tells LabVIEW how many times the loop needs to execute. Inside the loop LabVIEW peels of each element of the array in order for each iteration of the loop. Looks like this:
My comment regarding not needing the sequence frame was related to using the error cluster since that wire would allow you enforce data dependency like so:
Note that the VISA resource wire does the same thing.
"I got a little aggravated at how NI seemed to handle the loops in those two frames concurrently". That's because LabVIEW is a data-flow language, and not a sequenced language like C or VB. In fact, that's one of the things that makes LabVIEW so powerful.
Message Edited by smercurio_fc on 07-16-2007 04:48 PM
MAN! I KNEW that!!!! GGRRRRR!!! That makes sense. Actually that's WHY I connected the error lines in the first place was to aide in flow control. OH!!! Still getting used to LabVIEW.
But I still have a question related to flow control. Check out the pic below. LabVIEW runs everything in a seemingly random order... well at least where it STARTS each chain of data. It obviously starts with the static constants or the earliest data in each chain, but I can't figure out how in the world it's deciding WHICH chain to start first. It kind of seems to go with the lower right and work it's way to top-left, but it doesn't exactly do that either. I dunno if it's worth you answering this concern or not, but if you got one for me I'd be much obliged.
I should take a LabVIEW class! Yeah right, as if they'd let me... R&D means I won't need it tomorrow ;( which stinks cause I'm liking LabVIEW the more I learn it. (I was not fond of it in the beginning, but that was my stubborness).
thanks again so much for all your help!!!!
Also, I am using all those strings to make my display appear as I want it to... I wonder if there is another way? I am aware of system labels, but I like the look of the recessed, grayed control boxes better.
Message Edited by Radiance_Jon on 07-16-2007 05:06 PM

3D string array to file

How can I write a 3D string array to file?

sascha:
You could do this a lot of different ways.
The first and most obvious thing that comes to my mind is that you can
think about a 3D array as an array of 2D arrays. (For that matter a
2D array is an array of 1D arrays.)
Thus you could use a for loop to index your 3D array down to 2D and
then perform multiple writes to write each 2D array "element" of this
array of 2D arrays to disk. You would probably want to write some
sort of header which defines how many dimensions there are in the
array so that whatever reads it back later will have an easier time
reading it back. (Otherwise you'd have to implement EOF handling for
the read back portion.)
To read it back you just use the same logic but build a 3D array using
a 2D read inside a for loop.
Dou
glas De Clue
LabVIEW developer (looking for a job...
[email protected]
[email protected] (SaschaS) wrote in message news:...
> How can I write a 3D string array to file?

Fusion Security, SearchResponse next returning array index out of bound

I am trying to fetch all the roles under a search base and while iterating i am getting array index out of bound exception.
SimpleSearchFilter filter=store.getSimpleSearchFilter(RoleProfile.NAME,SimpleSearchFilter.TYPE_EQUAL,null);
String wildCardChar=filter.getWildCardChar();
filter.setValue(wildCardChar);
SearchParameters parameters=new SearchParameters(filter,SearchParameters.SEARCH_ROLES_ONLY) ;
SearchResponse resp=store.searchRoles(Role.SCOPE_ANY, parameters);
+while(resp.hasNext()){+
Role role=(Role)resp.next();
Can anybody kindly advise

Hi..
check this
http://andrejusb.blogspot.com/2011/01/fusion-middleware-11g-security-retrieve.htmlhope this will helpful

.csv to a string array

Hi,
This is probably a simple problem, but I have a csv file with string values in one column and numbers in another. For example:
Volume, 6
Diameter, 5
But much larger of a file.
I would like to be able to read the first column in and come up with an array of just the strings. I have tried using the Read Text from file into the Spreadsheet string to Array into the Index Array functions, but I cannot seem to get this string array to work out, as it just comes up with 0's for any text.
If anyone can point me in the right direction it would be greatly appreciated.
Thank You!!
Solved!
Go to Solution.

Hi sean,
you have to convert to an array of strings! Then you will receive your first column as text data...
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

How do I write the contents of a string array to file? Is there a package

freely avaliable to do this? I am writing a console program that will save the selections made to file. I have convenience packages that came with my book, it allows int and double arrays to be written to file, but not string arrays. Any help would be greatly appreciated.
Thanks,
Joe Lavender

One easy way to do this is to populate a Properties object with the index as the key and the element as the value.
The properties has built in methods for writing it to file and reading it in.

Array index out of bounds

I have in my code a method, proceed(), and in the method main, which i called.
however, the error msg:
java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 0
could someone please tell me what is wrong with my code?
// in the code, 2 arrays (keeping the contents and the count are
//declared
public static boolean proceed(String[] data, int[] count, int count_c){
for(int i=0; i<21; i++){
if ((data[i] == null) || (count[i] != count[i+1])){
return false;
if (count_c != count[21] && data[21] == null)
return false;
else
return true;
public static void main(String[] args){
Vector v=new Vector();
//... do something...
if(proceed(array, count, count_c)){
cell.setParameters(0, "cellid", array[0])
cell.setParameters(1, "sac", array[1]);
     cell.setParameters(21,"tmr_cspu", array[21]);
v.add(cell);
count_c++;
temp[0] = ((OneCell)v.get(0)).printParameters()[0];
error     -->     java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 0

sorry, i hope that this is better now. thanks for your comment.
in the code, 2 arrays (keeping the contents and the count) are declared
temp is also an array of size 23
i believe that the problem lies with the method proceedsince the method setParameters is correct...
i hope that my question is now clearer. thx for the trouble taken to answer me...
public static boolean proceed(String[] data, int[] count, int count_c){
    for(int i=0; i<21; i++){
        if ((data == null) || (count != count[i+1])){
            return false;
    if (count_c != count[21] && data[21] == null)
        return false;
    else
        return true;
public static void main(String[] args){
    Vector v=new Vector();
    //... do something...
    if(proceed(array, count, count_c)){
        cell.setParameters(0, "cellid", array[0])
        cell.setParameters(1, "sac", array[1]);
        cell.setParameters(21,"tmr_cspu", array[21]);
        v.add(cell);
        count_c++;
    temp[0] = ((OneCell)v.get(0)).printParameters()[0];

Using Enum as Array Index

Hi Experts,
Can you please suggest whether it 's possible to use a Enum as an array index in java? In C++, I can define a enum and use the enum as the array index. But, for some reason, I 've not been able to do so in Java. Can anyone please help me in achieving this.
Enum Index{indexOne, index2 ....};
Index ind;
and I should be able to use this for any array as an index:
String s = stringArray[ind.indexOne];
Is this possible in java? Please suggest.
Thanks,
Ganapathi

Hi - the originator of this question has probably found a good answer to this question, but in case anyone else trips on this along the way:
The oridinal() method can be used. Then spinning through the enumerated types, feels a little more like C.
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Enum.html
If it helps to see an example, here's one that follows from an exercise from the Sun tutorial dealing with representing a deck of playing cards. aCard is defined as a two dimensional array (suit, rank) with the suit and rank values defined as enums and used to represent a full deck of cards. A new Card class instance is generated and assigned to the array of cards (i.e. the deck of cards made up of instances of Cards, each named aCard).
The part to look at is simply the use of ordinal() to reference array positions.
private Card[][] aCard = new Card[NUM_SUITS][NUM_RANKS];
suitLoop:
for (Suit s: Suit.values()) {
rankLoop:
for (Rank r: Rank.values()) {
aCard[s.ordinal()][r.ordinal()] = new Card(s, r);
}

String array indexing

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