When measuring 6 voltage signals in labview I found that there was a difference in voltage signals in my program but not in the test panel. The test panel is correct. What is wrong with my program?

My labview program is not displaying equivelent voltages, but labview test panel is. So the computer is seeing the correct signals. My program is displaying a small difference in 3 out of 6 channels. All channels should be equal.

G'Day Pops,
You haven't really given us enough to go on - could you please post your VI so we can have a look at it?
cheers,
Christopher
Christopher G. Relf
Certified LabVIEW Developer
[email protected]
Int'l Voicemail & Fax: +61 2 8080 8132
Aust Voicemail & Fax: (02) 8080 8132
EULA
1) This is a private email, and although the views expressed within it may not be purely my own, unless specifically referenced I do not suggest they are necessarily associated with anyone else including, but not limited to, my employer(s).
2) This email has NOT been scanned for virii - attached file(s), if any, are provided as is. By copying, detaching and/or opening attached files, you agree to indemnify the sender of such responsibility.
3) B
ecause e-mail can be altered electronically, the integrity of this communication cannot be guaranteed.
Copyright © 2004-2015 Christopher G. Relf. Some Rights Reserved. This posting is licensed under a Creative Commons Attribution 2.5 License.

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Message was edited by: musicwind95
Message was edited by: musicwind95

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while (daphne > deirdre)
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while (daphne >= deirdre)
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What's wrong with my program?

Mission: A program which returns a digit based on what character you enter, and it should follow this structure:
Digit to output / Character entered
2 / ABC
3 / DEF
4 / GHI
5 / JKL
6 / MNO
7 / PRS
8 / TUV
9 / WXY
If you enter the letters Q, Z or any nonalphabetic letter, the program should output that an error was encountered. Must have two buttons, one for "Ok" and one for "Quit".
I made this code so far, which gives me tons of errors I don't get much out of:
import java.awt.*;
import java.awt.event.*;
public class digit
// Define action listener for alphabetic buttons
private static class ButtonHandler implements ActionListener
public void actionPerformed(ActionEvent event)
char charEntered; // Holds the character entered
String whichButton; // Button's name
// Get the right button
charEntered = inputField.getText();
whichButton = event.getActionCommand;
// If-Else procedures, to determine which button is pressed and what action to perform
if (whichButton.equals("ok"))
if (charEntered.equals("A"))
outputLabel.setText("Your digit is 2");
else if (charEntered == D || E || F)
outputLabel.setText("Your digit is 3");
else if (charEntered == G || H || I)
outputLabel.setText("Your digit is 4");
else if (charEntered == J || K || L)
outputLabel.setText("Your digit is 5");
else if (charEntered == M || N || O)
outputLabel.setText("Your digit is 6");
else if (charEntered == P || R || S)
outputLabel.setText("Your digit is 7");
else if (charEntered == T || U || V)
outputLabel.setText("Your digit is 8");
else if (charEntered == W || X || Y)
outputLabel.setText("Your digit is 9");
else outputLabel.setText("An error occured.");
private static class ButtonHandler2 implements ActionListener
public void actionPerformed(ActionEvent event)
dFrame.dispose();
System.exit(0);
private static TextField inputField; // Input field
private static Label outputLabel; // Output Label
private static Frame dFrame; // Frame
public static void main(String [] args)
// Declare alphabetic listener
ButtonHandler operation;
ButtonHandler2 quitoperation;
Label entryLabel; // Label for inputfield
Label outputLabel_label; // Label for outputfield
Button ok; // Ok Button
Button quit; // quit button
operation = new Buttonhandler();
quitoperation = new ButtonHandler2();
// New frame
dFrame = new Frame();
dFrame.setLayout(new GridLayout(4,2));
entryLabel = new Label("Enter letter here");
outputLabel_label = new Label("The result is");
outputLabel = new Label("0");
// Instantiate buttons
ok = new Button("Ok");
quit = new Button("Quit");
// Name the button events
ok.setActionCommand("ok");
quit.setActionCommand("quit");
// Register the button listeners
ok.addActionListener(operation);
quit.addActionListener(operation);
// Add interface to the Frame
dFrame.add(entryLabel);
dFrame.add(inputField);
dFrame.add(outputLabel_label);
dFrame.add(outputLabel);
dFrame.add(ok);
dFrame.add(quit);
dFrame.pack();
dFrame.show();
dFrame.addWindowListener(new WindowAdapter()
public void windowClosing(WindowEvent event)
dFrame.dispose();
System.exit(0);
I get these errors:
fnatte:~/inda/java/chapter6>javac digit.java
digit.java:23: incompatible types
found : java.lang.String
required: char
charEntered = inputField.getText();
^
digit.java:24: cannot resolve symbol
symbol : variable getActionCommand
location: class java.awt.event.ActionEvent
whichButton = event.getActionCommand;
^
digit.java:31: char cannot be dereferenced
if (charEntered.equals("A"))
^
digit.java:33: cannot resolve symbol
symbol : variable D
location: class digit.ButtonHandler
else if (charEntered == D || E || F)
^
digit.java:33: cannot resolve symbol
symbol : variable E
location: class digit.ButtonHandler
else if (charEntered == D || E || F)
^
digit.java:33: cannot resolve symbol
symbol : variable F
location: class digit.ButtonHandler
else if (charEntered == D || E || F)
^
digit.java:35: cannot resolve symbol
symbol : variable G
location: class digit.ButtonHandler
else if (charEntered == G || H || I)
^
digit.java:35: cannot resolve symbol
symbol : variable H
location: class digit.ButtonHandler
else if (charEntered == G || H || I)
^
digit.java:35: cannot resolve symbol
symbol : variable I
location: class digit.ButtonHandler
else if (charEntered == G || H || I)
^
digit.java:37: cannot resolve symbol
symbol : variable J
location: class digit.ButtonHandler
else if (charEntered == J || K || L)
^
digit.java:37: cannot resolve symbol
symbol : variable K
location: class digit.ButtonHandler
else if (charEntered == J || K || L)
^
digit.java:37: cannot resolve symbol
symbol : variable L
location: class digit.ButtonHandler
else if (charEntered == J || K || L)
^
digit.java:39: cannot resolve symbol
symbol : variable M
location: class digit.ButtonHandler
else if (charEntered == M || N || O)
^
digit.java:39: cannot resolve symbol
symbol : variable N
location: class digit.ButtonHandler
else if (charEntered == M || N || O)
^
digit.java:39: cannot resolve symbol
symbol : variable O
location: class digit.ButtonHandler
else if (charEntered == M || N || O)
^
digit.java:41: cannot resolve symbol
symbol : variable P
location: class digit.ButtonHandler
else if (charEntered == P || R || S)
^
digit.java:41: cannot resolve symbol
symbol : variable R
location: class digit.ButtonHandler
else if (charEntered == P || R || S)
^
digit.java:41: cannot resolve symbol
symbol : variable S
location: class digit.ButtonHandler
else if (charEntered == P || R || S)
^
digit.java:43: cannot resolve symbol
symbol : variable T
location: class digit.ButtonHandler
else if (charEntered == T || U || V)
^
digit.java:43: cannot resolve symbol
symbol : variable U
location: class digit.ButtonHandler
else if (charEntered == T || U || V)
^
digit.java:43: cannot resolve symbol
symbol : variable V
location: class digit.ButtonHandler
else if (charEntered == T || U || V)
^
digit.java:45: cannot resolve symbol
symbol : variable W
location: class digit.ButtonHandler
else if (charEntered == W || X || Y)
^
digit.java:45: cannot resolve symbol
symbol : variable X
location: class digit.ButtonHandler
else if (charEntered == W || X || Y)
^
digit.java:45: cannot resolve symbol
symbol : variable Y
location: class digit.ButtonHandler
else if (charEntered == W || X || Y)
^
digit.java:79: cannot resolve symbol
symbol : class Buttonhandler
location: class digit
operation = new Buttonhandler();
^
25 errors
I don't get what's wrong... I know it's something with the "equals" method.. but I can't get a grip on it.

Hi again,
Thanks, I'm beginning to understand the structure... charAt(0) means take character at index 0, i.e the first character.
I also understood how the || works, and I managed to compile the thing without errors. Now my code looks like this:
import java.awt.*;
import java.awt.event.*;
public class digit
    // Define action listener for alphabetic buttons
    private static class ButtonHandler implements ActionListener
     public void actionPerformed(ActionEvent event)
     char charEntered;    // Holds the character entered
     String whichButton; // Button's name
     // Get the right button
     charEntered = inputField.getText().charAt(0);
     whichButton = event.getActionCommand();
     // If-Else procedures, to determine which button is pressed and what action to perform
     if (whichButton.equals("ok"))
          if (charEntered == 'A' || charEntered == 'B' || charEntered == 'C')
         outputLabel.setText("Your digit is 2");
     else if (charEntered == 'D' || charEntered == 'E' || charEntered == 'F')
         outputLabel.setText("Your digit is 3");
     else if (charEntered == 'G' || charEntered == 'H' || charEntered == 'I')
         outputLabel.setText("Your digit is 4");
     else if (charEntered == 'J' || charEntered == 'K' || charEntered == 'L')
         outputLabel.setText("Your digit is 5");
     else if (charEntered == 'M' || charEntered == 'N' || charEntered == 'O')
         outputLabel.setText("Your digit is 6");
     else if (charEntered == 'P' || charEntered == 'R' || charEntered == 'S')
         outputLabel.setText("Your digit is 7");
     else if (charEntered == 'T' || charEntered == 'U' || charEntered == 'V')
         outputLabel.setText("Your digit is 8");
     else if (charEntered == 'W' || charEntered == 'X' || charEntered == 'Y')
         outputLabel.setText("Your digit is 9");
     else outputLabel.setText("An error occured.");
private static class ButtonHandler2 implements ActionListener
    public void actionPerformed(ActionEvent event)
     dFrame.dispose();
     System.exit(0);
private static TextField inputField; // Input field
private static Label outputLabel; // Output Label
private static Frame dFrame; // Frame
public static void main(String [] args)
    // Declare alphabetic listener
    ButtonHandler operation;
    ButtonHandler2 quitOperation;
    Label entryLabel; // Label for inputfield
    Label outputLabel_label; // Label for outputfield
    Button ok; // Ok Button
    Button quit; // quit button
    operation = new ButtonHandler();
    quitOperation = new ButtonHandler2();
    // New frame
    dFrame = new Frame();
    dFrame.setLayout(new GridLayout(4,2));
    entryLabel = new Label("Enter letter here");
    outputLabel_label = new Label("The result is");
    outputLabel = new Label("0");
    // Instantiate buttons
    ok = new Button("Ok");
    quit = new Button("Quit");
    // Name the button events
    ok.setActionCommand("ok");
    quit.setActionCommand("quit");
    // Register the button listeners
    ok.addActionListener(operation);
    quit.addActionListener(operation);
    // Add interface to the Frame
    dFrame.add(entryLabel);
    dFrame.add(inputField);
    dFrame.add(outputLabel_label);
    dFrame.add(outputLabel);
    dFrame.add(ok);
    dFrame.add(quit);
    dFrame.pack();
    dFrame.show();
    dFrame.addWindowListener(new WindowAdapter()
         public void windowClosing(WindowEvent event)
          dFrame.dispose();
          System.exit(0);
}And I get this error while I'm trying to run it:
fnatte:~/inda/java/chapter6>java digit
Exception in thread "main" java.lang.NoSuchMethodError: main

What Is Wrong With My Program Help

This Is The Assignment I Have To Do:
Write a Java program that prints a table with a list of at least 5 students together with their grades earned (lab points, bonus points, and the total) in the format below.
== Student Points ==
Name Lab Bonus Total
Joe 43 7 50
William 50 8 58
Mary Sue 39 10 49
The requirements for the program are as follows:
1.     Name the project StudentGrades.
2.     Print the border on the top as illustrated (using the slash and backslash characters).
3.     Use tab characters to get your columns aligned and you must use the + operator both for addition and string concatenation.
4.     Make up your own student names and points -- the ones shown are just for illustration purposes. You need 5 names.
This Is What I Have So Far:
* Darron Jones
* 4th Period
* ID 2497430
*I recieved help from the internet and the book
*StudentGrades
public class StudentGrades
     public static void main (String[] args )
System.out.println("///////////////////\\\\\\\\\\\\\\\\\\");
System.out.println("==          Student Points          ==");
System.out.println("\\\\\\\\\\\\\\\\\\\///////////////////");
System.out.println("                                      ");
System.out.println("Name            Lab     Bonus   Total");
System.out.println("----            ---     -----   -----");
System.out.println("Dill             43      7       50");
System.out.println("Josh             50      8       58");
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This will work exactly as you want it to be....hope u like it
     public static void main(String[] args)
          // TODO Auto-generated method stub
          System.out.print("///////////////////");
          System.out.print("\\\\\\\\\\\\\\\\\\\\\\\\");
          System.out.println("\\\\\\\\\\\\\\");
          System.out.println("== Student Points ==");
          System.out.print("\\\\\\\\\\\\\\");
          System.out.print("\\\\\\\\\\\\");
          System.out.print("\\\\\\\\\\\\");
          System.out.print("///////////////////");
          System.out.println(" ");
          System.out.println("Name Lab Bonus Total");
          System.out.println("---- --- ----- -----");
          System.out.println("Dill 43 7 50");
          System.out.println("Josh 50 8 58");
          System.out.println("Rebbeca 39 10 49");
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public class Hmw3
     public static char[] myMethod(char[]p1,int p2, char p3)
     {                             //13 th row
          if(p2<p1.length)
               p1[p2]=p3;
               System.out.println(p1);
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          char[] tmp=sentence.toCharArray();
          System.out.println(tmp);
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i wrote this program segment and compiler gave this error:
C:\Program Files\Xinox Software\JCreator LE\MyProjects\hmw3\Hmw3.java:13: missing return statement
What is wrong???

Your method signature states that myMethod should return an array for chars.
But in ur implementation of myMethod, there is nothing returned.
Just add a return statement like "return p1"

What is wrong with this program it keeps telling me the file doesn't exist?

this program is supposed to write the file so why does it need the file to already exist?
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.ArrayList;
import java.util.Scanner;
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    static File dir = new File("/Applications/RealmLister/");
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        p.add(input);
        p.add(submit);
        p.add(selected);
        f.add(p, BorderLayout.NORTH);
        f.add(status, BorderLayout.SOUTH);
        new NewClass();
        f.setSize(500,500);
        f.setVisible(true);
        try {
            loadConfig();
        } catch(Exception e) {}
        f.addWindowListener(new WindowAdapter() {
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                try {
                  writeConfig();
                  System.exit(0);
                } catch(Exception e) {
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    public NewClass() {
        submit.addActionListener(this);
        input.addKeyListener(new KeyAdapter() {
            public void keyPressed(KeyEvent e) {
                if(e.getKeyCode() == KeyEvent.VK_ENTER) {
                try {
                editRealmlist(input.getText(), true);
                input.setText("");
             catch(Exception ex) {
               status.setText("Error: "+e);
        selected.addActionListener(this);
    public void actionPerformed(ActionEvent e) {
        if(e.getSource() == submit) {
            try {
                editRealmlist(input.getText(), true);
                input.setText("");
            } catch(Exception ex) {
               status.setText("Error: "+e);
               wait(3000);
               status.setText("");
        if(e.getSource() == selected) {
            try {
                editRealmlist(list.getSelectedItem(),false);
            } catch(Exception ex) {
                status.setText("Error: "+e);
                wait(3000);
                status.setText("");
    public static void loadConfig() throws Exception{
        if(config.exists()) {
            Scanner scan = new Scanner(config);
            ArrayList<String> al = new ArrayList<String>();
            while(scan.hasNext()) {
                al.add(scan.nextLine());
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Erm, you should call mkdirs() on a File object that represents a directory.

HELP!! WHAT'S WRONG WITH MY PROGRAM?

It prints out "Please input next string" twice the first time and I can't figure out why. Here's the code:
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                         break;
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          } // end for
          // find string with most vowels
          int most=0;
          for(int i=0;i<numVowels.length-1;i++){
               if (numVowels[i]<numVowels[i+1]){
                    most = i+1;
          }// end for
          return test[most];
} // end class VowelCounter
Thanks a lot!

Hi,
U can do this with BufferedReader.
here is ur code
//It prints out "Please input next string" twice the first time and I can't figure out why. Here's the code:
import java.util.*;
import java.io.*;
public class VowelCounter {
     public static void main(String[] args) {
          BufferedReader bf= new BufferedReader(new InputStreamReader(System.in));
          Scanner read = new Scanner(System.in);
          int elements=0;
          // create string array
          System.out.print("How many strings do you want?");
          try{
               //elements = read.nextInt();
               elements = Integer.parseInt(bf.readLine());
          catch (Exception ime){
               System.err.println("Invalid data type!");
               System.exit(0);
          String[] testArray = new String[elements];
          int xyz =0;
          // populate String array
          for (int i=0;i<elements;i++){
               System.out.println(i+". Please input next string:\n");
               try {
                    testArray=bf.readLine();
               }catch(Exception ek){}
          } // end for
          // test array and print out result
          System.out.println(mostVowels(testArray)+ " has the most vowels.");
     } // end method main
     public static String mostVowels(String[] test){
          // create array to store count
          int[] numVowels = new int[test.length];
          // check all strings in array
          for (int i=0;i<test.length;i++){
               test[i].toLowerCase();
               // check each char in string
               for (int j=0; j<test[i].length();j++){
                    switch (test[i].charAt(j)){
                         case 'a': case 'e':case 'i':case 'o':case 'u':
                                                                                     numVowels[i]++;
                                                                                     break;
                    } // end switch
               } // end for
          } // end for
          // find string with most vowels
          int most=0;
          for(int i=0;i<numVowels.length-1;i++){
               if (numVowels[i]<numVowels[i+1]){
                    most = i+1;
          }// end for
          return test[most];
} // end class VowelCounter
Ganesh

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