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())

Similar Messages

  • 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)?
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    "1" converted to decimal = 1.
    "20" cast as I16 = 12848 or 3230 hex.
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    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.
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    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

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    See:
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  • 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)
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  • How to Change String back to math symbol for calculation??

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    int a;
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    for (int i=0; i<=3; i++)
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    There is no method to achieve this...aa far as I am aware of.

  • Append String to Integer

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    B

    sabre150 wrote:
    Skotty wrote:
    Without debating the logic of doing such a thing...
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  • 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);
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    }Can you help me?????

    Create a Value Object.
    public class MyInteger {
        // The encapsulated property (required).
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        // Always declare a default no-arg constructor if you have declared another constructors (javabean spec).
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        // The getter of the encapsulated property (required).
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            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));
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  • 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:
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    regards
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    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).
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    shb
    Attachments:
    Demo - Update Ring synchron.vi ‏21 KB
    Update Ring synchron1.vi ‏14 KB

  • Logic behind string to integer typecasting..

    hi fourm,
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    Advance thanking
    siva

        public static int parseInt(String s) throws NumberFormatException {
         return parseInt(s,10);
        public static int parseInt(String s, int radix)
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            if (s == null) {
                throw new NumberFormatException("null");
         if (radix < Character.MIN_RADIX) {
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                                 " 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:-
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    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:
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    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"/>
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    <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>
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    <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
    We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
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