Change string to integer.

I'm trying to change a string to an integer but my code isn't playing nice. I'm using (for example):
Integer.parseInt(" 15")
I've tried printing this to screen and it doesn't give me anything. Is there any way to get rid of the white space characters from a string? I can't use substring() as I have numbers up to 20,000 and I want to loop them using the same code.

It should at least give you a java.lang.NumberFormatException
This should work:
Integer.parseInt(" 15".trim())

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Convert string to integer

package onjava;
import java.io.*;
import java.net.*;
import java.util.*;
import org.apache.soap.*;
import org.apache.soap.rpc.*;
import java.lang.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class CalcClient extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\"");
out.println("\"http://www.w3.org/TR/html4/loose.dtd\">");
out.println("<html>");
out.println("<head>");
out.println("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=iso-8859-1\">");
out.println("<title>Substraction using SOAP</title>");
out.println("</head>");
    URL url = new URL ("http://localhost/soap/servlet/rpcrouter");
Integer p1=request.getParameter("param1");
Integer p2=request.getParameter("param2");
In the above statement i have to convert the string to integer because that has to be passed in my program as an argument to a function so please let me know how to do that
    // Build the call.
    Call call = new Call();
    call.setTargetObjectURI("urn:onjavaserver");
    call.setMethodName("subtract");
    call.setEncodingStyleURI(Constants.NS_URI_SOAP_ENC);
    Vector params = new Vector();
    params.addElement(new Parameter("p1", Integer.class, p1, null));
    params.addElement(new Parameter("p2", Integer.class, p2, null));
    call.setParams (params);
    // make the call: note that the action URI is empty because the
    // XML-SOAP rpc router does not need this. This may change in the
    // future.
    Response resp = call.invoke(url, "" );
    // Check the response.
    if ( resp.generatedFault() ) {
      Fault fault = resp.getFault ();
     out.println("The call failed: ");
     out.println("Fault Code   = " + fault.getFaultCode());
     out.println("Fault String = " + fault.getFaultString());
    else {
      Parameter result = resp.getReturnValue();
      out.println(result.getValue());
out.println("</body>");
out.println("</html>");

Two possibilities: Try either java.lang.Integer.valueOf() or java.text.NumberFormat and its parse method.
Either one will do what you want. I think Integer will be the simpler of the two.
The code you have is obviously not correct, because getParameter returns a String:
Integer p1=request.getParameter("param1");Do it like this:
Integer p1=Integer.valueOf(request.getParameter("param1"));%

How to use type cast change string to number(dbl)?can it work?

how to use type cast change string to number(dbl)?can it work?

Do you want to Type Cast (function in the Advanced >> Data Manipulation palette) or Convert (functions in the String >> String/Number Conversion palette)?
2 simple examples:
"1" cast as I8 = 49 or 31 hex.
"1" converted to decimal = 1.
"20" cast as I16 = 12848 or 3230 hex.
"20" converted to decimal = 20.
Note that type casting a string to an integer results in a byte by byte conversion to the ASCII values.
32 hex is an ASCII "2" and 30 hex is an ASCII "0" so "20" cast as I16 becomes 3230 hex.
When type casting a string to a double, the string must conform the the IEEE 32 bit floating point representation, which is typically not easy to enter from the keyboard.
See tha attached LabView 6.1 example.
Attachments:
TypeCastAndConvert.vi ‏34 KB

How to change String to double ?

I want to change String to double in Applet program, but for the run time, error is occurred.
It can not find the method parseDouble.
Error -> Double.parseDouble("7.5");
I try to test String to Integer, it works fine.
OK -> Integer.parseInt("7");
How to change String to double in Applet ?

Yea, the Double.parseDouble method came in a later release (first time in 1.2).

Can't change string variable values in Flash CS4 Debugger

I'm using the Flash CS4 debugger, and while I can change numeric variable values in the Variables panel, I can't change string variable values. The only characters the fields accept are the numbers 1-9 and the characters "d" and "j".
I can paste strings into the value fields, but that's a bit of a pain. I've tried this on a couple of different Flash CS4 installations and get the same results.
Does anyone know if it's possible to change string values in the Variables panel of the Flash CS4 Debugger?

See:
http://forum.java.sun.com/thread.jspa?threadID=591012&tstart=15

How to get the value of String in integer type

how to get the value of String in integer

{color:#0000ff}http://java.sun.com/javase/6/docs/api/java/lang/Integer.html#parseInt(java.lang.String)
http://java.sun.com/javase/6/docs/api/java/lang/Integer.html#valueOf(java.lang.String){color}

How to Change String back to math symbol for calculation??

Hi,
How to Change String back to math symbol for calculation to achieve this coding. it's for a for loop
int a;
String sym0 = "+";
String sym1 = "-";
String sym2 = "*";
String sym3 = "/";
for (int i=0; i<=3; i++)
a = 45 sym0 74;
}

There is no method to achieve this...aa far as I am aware of.

Append String to Integer

Hi Guys,
I am trying to append a String to Integer like this;
String areacode = 020;
Integer phone_no = 21354214;
Integer full = areacode && phone_no;My problem is how to join the two datatypes to a single Integer value. Do anyone know how to go about this?
B

sabre150 wrote:
Skotty wrote:
Without debating the logic of doing such a thing...
Concatenate them as Strings, then convert that String back to an Integer.Your are on the top floor of the Eiffel Tower and a man is trying to climb over the safety netting but having trouble climbing the netting. You ask him why he is doing this and he says he has to get down to the ground as soon as possible but he has an irrational fear of lifts. Do you help him climb the safety netting or do you advise him that this is not a good idea and try to stop him?I get him to use my camera to take my picture.

How to change value of Integer object ?

I wrote a program:
public class Tester{
     public static void changeValue( Integer a, int b ){
          a.valueOf(b);
     public static void main( String[] args ){
          Integer a = new Integer(15);
          Tester.changeValue(a, 20);
          System.out.println(a); // It will print to screen the value 15, but i want it is 20.
}Can you help me?????

Create a Value Object.
public class MyInteger {
    // The encapsulated property (required).
    private Integer value;
    // Always declare a default no-arg constructor if you have declared another constructors (javabean spec).
    public MyInteger() {
        // Default constructor, keep alive.
    // This constructor is here so that you don't need to call setValue() after default construction (optional).
    public MyInteger(Integer value) {
        this.value = value;
    // The getter of the encapsulated property (required).
    public Integer getValue() {
        return value;
    // The setter of the encapsulated property (required).
    public void setValue(Integer value) {
        this.value = value;
    // The string representation of this object which pleases reading in logs (optional).
    public String toString() {
        return "MyInteger[" + String.valueOf(value) + "]";
public class Tester {
    public static void changeValue(MyInteger myInteger, int b) {
        myInteger.setValue(new Integer(b));
    public static void main(String[] args) {
        MyInteger a = new MyInteger(new Integer(15));
        Tester.changeValue(a, 20);
        System.out.println(a);
}

Change strings of (strict type def) refnum

mitulatbati wrote in http://forums.ni.com/ni/board/message?board.id=170&thread.id=233257&view=by_date_ascending&page=5:
Hi,
I have made a strict type def, which is a text ring. I open the VI reference -> get Panel property node -> Controls[] -> Index first element (there is only one, the ring) -> change Strings and values, and then close reference.
If I call this subvi from a VI, which includes this strict type ring, it will be only updated, when I restart the VI. And not in runtime. I don´t get any error, everything looks fine, but the strings and values are not updated :-(
Is there a way not to restart the VI, but to modify the ring programatically?
regards
MB
Message Edited by shb on 07-29-2008 11:52 AM

Hello mitulatbati,
I do something similar with a Combo Box. The reference to each box is stored in an unitinialised shift register of a VI. When I want to change the selectable text, I do it in a for loop for every stored control.
A VI doeing this for Rings is attached (LV8.2.1).
Greetings,
shb
Attachments:
Demo - Update Ring synchron.vi ‏21 KB
Update Ring synchron1.vi ‏14 KB

Logic behind string to integer typecasting..

hi fourm,
i'm siva. i learnt typecasting in java. but i'm still wondering how the string to integer typecasting works, what is the logic behind this casting. somebody please help me out...
Advance thanking
siva

    public static int parseInt(String s) throws NumberFormatException {
     return parseInt(s,10);
    public static int parseInt(String s, int radix)
          throws NumberFormatException
        if (s == null) {
            throw new NumberFormatException("null");
     if (radix < Character.MIN_RADIX) {
         throw new NumberFormatException("radix " + radix +
                             " less than Character.MIN_RADIX");
     if (radix > Character.MAX_RADIX) {
         throw new NumberFormatException("radix " + radix +
                             " greater than Character.MAX_RADIX");
     int result = 0;
     boolean negative = false;
     int i = 0, max = s.length();
     int limit;
     int multmin;
     int digit;
     if (max > 0) {
         if (s.charAt(0) == '-') {
          negative = true;
          limit = Integer.MIN_VALUE;
          i++;
         } else {
          limit = -Integer.MAX_VALUE;
         multmin = limit / radix;
         if (i < max) {
          digit = Character.digit(s.charAt(i++),radix);
          if (digit < 0) {
              throw NumberFormatException.forInputString(s);
          } else {
              result = -digit;
         while (i < max) {
          // Accumulating negatively avoids surprises near MAX_VALUE
          digit = Character.digit(s.charAt(i++),radix);
          if (digit < 0) {
              throw NumberFormatException.forInputString(s);
          if (result < multmin) {
              throw NumberFormatException.forInputString(s);
          result *= radix;
          if (result < limit + digit) {
              throw NumberFormatException.forInputString(s);
          result -= digit;
     } else {
         throw NumberFormatException.forInputString(s);
     if (negative) {
         if (i > 1) {
          return result;
         } else {     /* Only got "-" */
          throw NumberFormatException.forInputString(s);
     } else {
         return -result;
    }Now where is the missing "logic".

Typecasting string to integer. need help

Hi,
I have the following statement which returns a String but i need to convert to an integer .
properties.getProperty("MAXWIDTH");
Can i do it this way,
int width = (Integer) properties.getProperty("MAXWIDTH");
But it gives me error stating that it cannot convert string to integer.
Please help
Purnima

That's because the value returned from the
getProperty() method is a String. You can convert it
to an int, like this:int width =
Integer.parseInt(properties.getProperty("MAXWIDTH"));[
/code]oh so simple thanks
Purnima

Convert text box string into integer

i have an html file in which i m using a text box , for entering amount i m using that text box entry at next jsp. i want to convert amount string into integer for further processing. At next jsp i m using:-
String amount= request.getParameter("bal");
int ammount1= Integer.parseInt(ammount);
and in sql query i m using amount1 as:-
ResultSet rs1 = st.executeQuery("update saving set balance = balance - amount1 where saving.account_no = '" + acc +"'");
my problem is i m getting following error:-
server encountered an internal error and
exception:- numberformat exception
please help me as soon as possible

int ammount1= Integer.parseInt(ammount).toString();
good to put try block too..
try
int ammount1 = Integer.parseInt(ammount).toString();
catch(NumberFormatException e)
...}

Problems when changing hex string to integer.

Hi
I am trying to change a hex string to an integer. I have done this using the following code:
theinteger = Integer.parseInt(thestring, 16);
this works for every hex number up to 7fffffff (Hex). As soon as I go to 80000000 (Hex) a number format exception occurs.
Does any know why this is happening as the highest number I need to go to is ffffffff (Hex).
Thanks

you must parse it to long.
7FFFFFFFF is the highest number that a int can hold.
0x80000000 being the lowest negative number.
Anyway, parsing to long should take care of the problem.

How to change string text in xaml

I have string text in ListPickerItem like this
<toolkit:ListPicker x:Name="items" FullModeHeader="Items" Background="White" Margin="10,280,14,0" VerticalAlignment="Top" Foreground="Black" FontSize="25.333">
<toolkit:ListPicker.Header>
<TextBlock x:Name="Choose_Items" Opacity="0.8" Text="Choose Items" Foreground="White"/>
</toolkit:ListPicker.Header>
<corelib:String>item1</corelib:String>
<corelib:String>item2</corelib:String>
<corelib:String>item3</corelib:String>
<corelib:String>item4</corelib:String>
<corelib:String>item5</corelib:String>
<corelib:String>item6</corelib:String>
<corelib:String>item7</corelib:String>
<corelib:String>item8</corelib:String>
</toolkit:ListPicker>
So in code I want to change this text by the resource each string have another value like this
And the code is
Public Shared Iterator Function FindVisualChildren(ByVal obj As DependencyObject) As IEnumerable(Of DependencyObject)
If obj IsNot Nothing Then
For i As Integer = 0 To VisualTreeHelper.GetChildrenCount(obj) - 1
Dim child As DependencyObject = VisualTreeHelper.GetChild(obj, i)
If child IsNot Nothing Then
Yield child
End If
For Each subChild In FindVisualChildren(child)
Yield subChild
Next
Next
End If
End Function
Private Sub Change()
Dim rm As New ResourceManager("App.Resource1", GetType(MainPage).Assembly)
Dim main As Grid = ContentPanel
Dim result = FindVisualChildren(main)
Dim ST = result.OfType(Of String)()
For Each item In ST
item = rm.GetString(item.Text)
Next
End Sub
So How I can make right code to run like this problem ??
Thanks :)

Hi Shay Boshra,
Based on your description, it seems that you want to change the ListPickerItem content based on the resource file, if I do not misunderstand you, an easy way to implement it is that first you can define the ListPicker as following:
In the MainPage.xaml:
<toolkit:ListPicker x:Name="items" Background="White" Margin="0,-11,24,0" VerticalAlignment="Top" Foreground="Black" FontSize="25.333">
<toolkit:ListPicker.Header>
<TextBlock x:Name="Choose_Items" Opacity="0.8" Text="Choose Items" Foreground="White"/>
</toolkit:ListPicker.Header>
<toolkit:ListPickerItem Content="item1"></toolkit:ListPickerItem>
<toolkit:ListPickerItem Content="item2"></toolkit:ListPickerItem>
<toolkit:ListPickerItem Content="item3"></toolkit:ListPickerItem>
<toolkit:ListPickerItem Content="item4"></toolkit:ListPickerItem>
<toolkit:ListPickerItem Content="item5"></toolkit:ListPickerItem>
</toolkit:ListPicker>
<Button Content="Change Text" HorizontalAlignment="Left" Margin="20,446,0,0" VerticalAlignment="Top" Click="Button_Click" Width="299"/>
In the MainPage.xaml.cs:
Private Sub Button_Click(sender As Object, e As RoutedEventArgs)
Dim ResourceManager As New ResourceManager("App.Resource1", GetType(MainPage).Assembly)
For Each listpickitem As ListPickerItem In items.Items
listpickitem.Content = ResourceManager.GetString(listpickitem.Content.ToString())
Next
End Sub
The result:
Best Regards,
Amy Peng
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Change string to integer.

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