Initializing string array registers

Hello. I have posted my project. It is not even close to finished but I am having trouble initializing the array's labeled "Up values" and "Down values", to "0" for all elements, at beginning of Vi run. So, when I am at the Front Panel and running the Vi, I would like all of the fields to begin with a "0", the moment the Vi is started. I have tried a couple different things I could think of and watched the Core 1 Video about arrays again however, it doesn't give the example for a string and nothing I have tried so far, is working. Thank you.

crossrulz wrote:
There are a few options to you:
1. Use an initialization state to write to your indicators their default values via a local variable
2. Put the default values into the indicators and then right-click on them and choose Data Operations->Make Current Value Default. This will store the default value in the indicators themselves.
I would recommend going with #1.
2. Put the default values into the indicators and then right-click on them and choose Data Operations->Make Current Value Default. This will store the default value in the indicators themselves. I put a "0" in each field, I slected "make current value default, but after the Vi ran, and then I started the Vi again, it keeps the numbers in the registers that are left over from the previous test. I also tried your suggestion #1. however, it still isn't writing a "0" in all the fields. The reason for this is that I don't want the operator's to read old data accidentally, when the Vi is running. I thought if I wipe all the registers out, it will prevent that from happening.

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Problems with string arrays

Previous task was:
Write a class "QuestionAnalyser" which has a method "turnAnswerToScore". This method takes a String parameter and returns an int. The int returned depends upon the parameter:
parameter score
"A" 1
"B" 2
"C" 3
other 0
Alright, here's the recent task:
Write another method "turnAnswersToScore". This method takes an array of Strings as a parameter, works out the numerical score for each array entry, and adds the scores up, returning the total.
That's my code:
class QuestionAnalyser{
public static int Score;
public String[] Answer;
public static void main(String[] args) {}
     public int turnAnswerToScore(String[] Answer)
for (int i = 0; i < Answer.length;i++) {
if (Answer.equals("A")) {
Score = Score + 1; }
else if (Answer[i].equals("B")) {
Score = Score + 2;}
else if (Answer[i].equals("C")) {
Score = Score + 3;}
else {
Score = Score + 0;}
return Score;
this is the error message I get:
The results of trying to compile your submission and run it against a set of test data was as follows:
----------Compilation output--------------------------------------
javac QATest2.java
QATest2.java:15: cannot resolve symbol
symbol : method turnAnswersToScore (java.lang.String[])
location: class QuestionAnalyser
if(qa.turnAnswersToScore(task)!=total){
^
What went wrong?
Suggestions would be greatly appreciated!

If I declare int score in the method i get this message
The results of trying to compile your submission and run it against a set of test data was as follows:
----------Compilation output--------------------------------------
javac QATest2.java
./QuestionAnalyser.java:20: variable score might not have been initialized
score++; }
^
./QuestionAnalyser.java:23: variable score might not have been initialized
score++;
^
./QuestionAnalyser.java:27: variable score might not have been initialized
score++;
^
./QuestionAnalyser.java:34: variable score might not have been initialized
return score;
^
4 errors
----------Sorry expected answer was-------------------------------
The method turnAnswersToScore is working OK - well done!
----------Your answer however was---------------------------------
Exception in thread "main" java.lang.NoClassDefFoundError: QuestionAnalyser
     at QATest2.main(QATest2.java:4)
This is the message I get from the submission page, but trying to compile it I get the same messages.
The code looks like this, then
class QuestionAnalyser{
String[] answer;
public static void main(String[] args) {}
     public int turnAnswersToScore(String[] answer)
int score;
for (int i = 0; i < answer.length; i++) {
if (answer.equals("A")) {
score++; }
else if (answer[i].equals("B")) {
score++;
score++; }
else if (answer[i].equals("C")) {
score++;
score++;
score++; }
else {}
return score;
When I leave 'public int score;' where it was before (right after the class declaration below the declaration of the string array) I get this but it compiles normally.
The results of trying to compile your submission and run it against a set of test data was as follows:
----------Compilation output--------------------------------------
javac QATest2.java
----------Sorry expected answer was-------------------------------
The method turnAnswersToScore is working OK - well done!
----------Your answer however was---------------------------------
wrong answer in turnAnswersToScore for
BDCAADDCA
Alright, even university students need to sleep :-)
Good night.

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

Initializing object array

Hi,
I am having problem initializing object array - here is my scenario -
I have created class a -
public class A {
Public String a1;
Public String a2;
Public String a3;
}the I have created class b
public class B {
Public A [] aa;
}and I want to initialiaze my class bi in anoither clas c
public class C{
A ar = new A;
ar.aa[0].a1 = "test"
}this gives me null ..please anybody help me
Neha
}

Thanks for the reply ..I know this is not good code ..but I have to write the classes in this way in SAP to create the Webservice ...the SAP side understand this type of structure only ..I still got the same error ..here are my original classes -
public class GRDataItem {
     public String AUFNR ;
     public String EXIDP ;
     public String EXIDC;
     public String MATNR ;
     public String WERKS ;
     public String CHARG ;
     public String VEMNG ;
     public String VEMEH ;
     public String CWMVEMEH ;
     public String CWMVEMNG ;
     public String STATUS;
public class GRDataTab {
     public GRDataItem [] grItem;
Public class webservice {
            int sn = 20 ;
              GRDataTab tab = new GRDataTab();
            tab.grItem = new GRDataItem[sn];
            tab.grItem[1].AUFNR = "12";
}Thanks for all your help
Neha

Problems declaring string array.

I am having a problem declaring string arrays in a class that I am writing now. For some reason this code won't work:
public class rotors()
String[] rotor = new String[5];
rotor [0] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
rotor [1] = "ACEGIKMOQSUWYBDFHJLNPRTVXZ";
rotor [2] = "BDFHJLNPRTVXZACEGIKMOQSUWY";
rotor [3] = "AEIOUYBCDFGHJKLMNPQRSTVWXZ";
rotor [4] = "BCDFGHJKLMNPQRSTVWXZAEIOUY";
}//end rotorsOn the other hand, this code will:
public class rotors()
String[] rotor={"ABCDEFGHIJKLMNOPQRSTUVWXYZ","ACEGIKMOQSUWYBDFHJLNPRTVXZ","BDFHJLNPRTVXZACEGIKMOQSUWY", "AEIOUYBCDFGHJKLMNPQRSTVWXZ", "BCDFGHJKLMNPQRSTVWXZAEIOUY"};
}//end rotorsI've noticed that the first code block that I posted will work, but only if I post it in a method, but not just hanging out in the class. Can anyone tell me why this is so? It seems odd to me that the first code doesn't work while the second one does. Thanks a lot
Edited by: archangeleon on Oct 10, 2008 9:13 PM

You can initialize a newly declared variable outside of a method/constructor/initializer block, but you can't call other statements outside of these blocks. The rotor array is declared here: String[] rotor... and can only be initialized (if at all) on this line.

String array, integer index

class TetrisBoard {
     public static void main(String[] args) {
          String board[][] = new String[5][5];
          int column;
          int row;
          char piece;
          String board[][] = {{"| ","| ","| ","| ","| ",},
                                   {"| ","| ","| ","| ","| ",},
                                   {"| ","| ","| ","| ","| ",},
                                   {"| ","| ","| ","| ","| ",},
                                   {"| ","| ","| ","| ","| ",}};
          for(int row = 0; row < board.length; row ++) {
               for(int col = 0; col < board[row].length; col++) {
               System.out.print(board[row][col]);
}hey, this is the code i have. How do i make the indexes be integers, so that board[row][col] is compatible with String board[5][5]? thanks for the help :D

You are declaring the variable 'board' twice. Thats the first problem.
The second is you have to use the array constatant only when initializing the array.
Do this instead
class TetrisBoard {
     public static void main(String[] args) {
          String board[][] = new String[][]
               { "| ", "| ", "| ", "| ", "| ", },
               { "| ", "| ", "| ", "| ", "| ", },
               { "| ", "| ", "| ", "| ", "| ", },
               { "| ", "| ", "| ", "| ", "| ", },
               { "| ", "| ", "| ", "| ", "| ", }
...- Roy

Problems with string array, please help!

I have a String array floor[][], it has 20 rows and columns
After I do some statement to modify it, I print this array
out in JTextArea, why the output be like this?
null* null....
null null...
null null...
How to correct it?

a turtle graphics applet:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TG extends JApplet implements ActionListener {
private int x, y;
private int pendown, command, movement;
String direction, output, temp;
JLabel l1;
JTextField tf1;
JTextArea ta1;
String floor[][] = new String[20][20];;
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    x = 0;
    y = 0;
    pendown = 0;
    direction = "r";
    Container c = getContentPane();
    c.setLayout( new FlowLayout() );
       l1 = new JLabel( "Please type a command:" );
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       tf1 = new JTextField(20);
       tf1.addActionListener( this );
       c.add( tf1 );
       ta1 = new JTextArea(20,20);
       ta1.setEditable( false );
       c.add( ta1 );
public void actionPerformed( ActionEvent e )
       temp = tf1.getText();
       if( temp.length() > 1)
       command = Integer.parseInt(temp.substring(0,1));
       movement = Integer.parseInt(temp.substring(2,temp.length()));
       else
       command = Integer.parseInt(temp);
       switch(command)
            case 1:
            pendown=0;
            break;
            case 2:
            pendown=1;
            break;
            case 3:
            direct("r");
            break;
            case 4:
            direct("l");
            break;
            case 5:
           move(movement);
            break;
            case 6:
            print();
            break;
public void direct(String s)
     if(direction == "r" && s =="r")
        direction = "d";
     else if(direction == "r" && s =="l")
        direction = "u";
     else if(direction == "l" && s =="r")
        direction = "u";
     else if(direction == "l" && s =="l")
        direction = "d";
     else if(direction == "u" && s =="r")
        direction = "r";
     else if(direction == "u" && s =="l")
        direction = "l";
     else if(direction == "d" && s =="r")
        direction = "l";
     else if(direction == "d" && s =="l")
        direction = "r";
public void move(int movement)
     if(pendown == 1)
          if(direction == "u")
          for(int b=0;b<movement;b++)
               floor[x][y+b] = "*";
          else if(direction == "d")
          for(int b=0;b<movement;b++)
               floor[x][y-b] = "*";
          else if(direction == "l")
          for(int b=0;b<movement;b++)
               floor[x-b][y] = "*";
          else if(direction == "r")
          for(int b=0;b<movement;b++)
               floor[x+b][y] = "*";
      else if(pendown == 0)
           if(direction == "u")
          for(int b=0;b<movement;b++)
               floor[x][y+b] = "-";
          else if(direction == "d")
          for(int b=0;b<movement;b++)
               floor[x][y-b] = "-";
          else if(direction == "l")
          for(int b=0;b<movement;b++)
               floor[x-b][y] = "-";
          else if(direction == "r")
          for(int b=0;b<movement;b++)
               floor[x+b][y] = "-";
      public void print()
     for(int row=0;row<20;row++)
       for( int column=0;column<20;column++)
            output += floor[row][column];
            if(column == 19)
             output+="\n";
        ta1.setText(output);
}

Remove null values from string array

Hi ,
I have a string array in a jsp page which I save some values inside. After I store the values I want to print only those who are not null. How can I do this? Is there a way to delete the null values?

Thank you but because I am new in programming what do you mean to use continue. Can you explain it a little bit further?<%
//go through the array to check all the values
for(int i=0; i<array.length();i++) {
//If array is null, nothing happen
if(array==null){
//leave here blank; instead use continue like:
//this will skip the statements next to it, and increments the value of i in for loop and continues to execute the body of for loop.
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continue;
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else{
out.print(array+"<br>"); //don't change the logic here
%>

Getting one character at a certain position from a string array

Hi, i'm new at learning java, but have strong experience at C++ and asm. How would i get one character at a certain positon from a string array.
for example:
String Phrases[] = {"To be or not to be, that is the question","The Simpsons","The Mole","Terminator three rise of the machines","The matrix"};
that is my string array above.
lets say i wanted to get the first character from the first element of the array which is "T", how would i get this

ok well that didn't work, but i found getChars function can do what i want. One problem, how do i check the contents of char array defined as char Inchar[];

How to add elements into java string array?

I open a file and want to put the contents in a string array. I tried as below.
String[] names;
s = new Scanner(new BufferedReader(new FileReader("outfile.txt")));
while (s.hasNext()) {
                String item = s.next();
                item.trim();
                email = item;
                names = email;
            }But I know that this is a wrong way of adding elements into my string array names []. How do I do it? Thanks.

Actually you cannot increase the size of a String array. But you can create a temp array with the lengt = lengthofarray+1 and use arraycopy method to copy all elements to new array, then you can assign the value of string at the end of the temp array
I would use this one:
String [] sArray = null;
s = new Scanner(new BufferedReader(new FileReader("outfile.txt")));
while (s.hasNext()) {
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    item.trim();
    email = item;
    sArray = addToStringArray(sArray, email);
* Method for increasing the size of a String Array with the given string.
* Given string will be added at the end of the String array.
* @param sArray String array to be increased. If null, an array will be returned with one element: String s
* @param s String to be added to the end of the array. If null, sArray will be returned.(No change)
* @return sArray increased with String s
public String[] addToStringArray (String[] sArray, String s){
     if (sArray == null){
          if (s!= null){
               String[] temp = {s};
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}Edited by: mimdalli on May 4, 2009 8:22 AM
Edited by: mimdalli on May 4, 2009 8:26 AM
Edited by: mimdalli on May 4, 2009 8:27 AM

Exporting a String Array to an HTML file

Hey everyone..I'm currently making lots of progress in my project...but right now I've been trying to make a button that exports my search results to an html file...basically what I've made is a search engine to search webcrawler files...
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Actually..nevermind, sorry.

How to populate items in selectOneListBox from a string array

Hi
I have got a string array result[] .Now i wish to display the array items in selectOneListBox.Please help me?

Alance wrote:
Hi
I have got a string array result[] .Now i wish to display the array items in selectOneListBox.Please help me?I can only guess what your selectOneListBox is but if it is JComboBox - have you ever thought about reading the API ?
[http://java.sun.com/javase/6/docs/api/javax/swing/JComboBox.html]
There's a wonderful constructor which probably does what you are looking for.

How to use a WebService Model with String Arrays as its input parameter

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I am facing the following scenario -
From WebDynpro Java i need to pass 2 String Arrays to a Webservice.
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Hi Hajra..
chec this link...
http://mail-archives.apache.org/mod_mbox/beehive-commits/200507.mbox/<[email protected]>
http://www.theserverside.com/tt/articles/article.tss?l=MonsonHaefel-Column2
Urs GS

Trying to compare string array using equals not working

Hi,
im prolly being really dumb here, but i am trying to compare 2 string arrays using the following code:
if(array.equals(copymearray))
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try
if (Arrays.equals(array, copymearray))
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Getting lenght of String array

Hi,
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Now i want to calculate length of a string array.e.g
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int lenght = str.length()
As you can see i want to calculate total number of entries in an array after i split it dynamically.
Currently it is giving me exception, "Unable to parse exception; Undefined method: length for class: [Ljava.lang.String]"
Thanks

This is a tricky one. An Array has a length property, unlike a String which has a length method.
So...
int length = str.length
Anthony Holloway
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Initializing string array registers

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