Converting a String to an Int???? (Java)

I am reading in a value from the user as a string. But I need to use that value as an int value. Can you parse a string to an int? Or can someone tell me another way I should be doing this?
Thanks

Integer.parseInt()
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How can I convert a String into an int?

I need to use command-line args. So I enter "java Main 123" and I want to use 123 not as a String but as an int.
How can I convert it into an int?
Thank You!!
Sprocket

Example method (you don't need to use a method unless you do this a lot)
private int stringTOInt (String aString)
int result = 0;
try
result = Integer.parseString(aString);
catch (Exception ex)
System.out.println ("Failed to convert string " + aString + " to int.");
return result;
}

How to convert a string[] to a int ?

Hi,
I'm a beginner in JAVA and I shall create a function that convert a date into a long (this is done), the problem I have is that I retrieve the date from a text field (so it's a string[]), therefore when I put it (as parameter) into my function it's crash and that's normal.
Is anyone able to help me ?
Thanks
//This is my code, my function//
//Function which convert Date parameter as seconds numeric value
public long ConvertDateToSec(int day, int month, int year)
java.util.Date date = new java.util.GregorianCalendar(year, month,day).getTime();
long seconds = date.getTime() / 1000;
System.out.println("La date en seconde est " + seconds);
return seconds;
//And this is when I retrieve the data and when I put it as parameter
long begindat;//For storing begin date seconds value
String daydeb=request.getParameterValues("BeginDay");
String monthdeb=request.getParameterValues("BeginMonth");
String yeardeb=request.getParameterValues("BeginYear");
begindat=ConvertDateToSec(yeardeb,monthdeb,daydeb);

salut,
pour r�cuperer UNE VALEUR UNIQUE d'un champ, utilise la m�thode request.getParameter("monChamp") au lieu de request.getParameterValues() qui est plutot utilis�e pour les champs qui peuvent contenir plusieurs valeurs comme les checkbox par exemple :
dans ton code cela donnera :
String daydeb=request.getParameter("BeginDay");
String monthdeb=request.getParameter("BeginMonth");
String yeardeb=request.getParameter("BeginYear");
ensuite convertis les chaines que tu as r�cup�r� en int :
int day = Integer.valueOf(daydeb).intValue();
int month = Integer.valueOf(monthdeb).intValue();
int year = Integer.valueOf(yeardeb).intValue();
enfin, tu utilises ta fonction de conversion :
long lgDate = ConvertDateToSec(day, month, year);
bon courage !
Badr.

Converting a String to an Int

Hi,
I am having trouble coding my programming. I need to compare two teams scores, and I believe to do this I have to convert the team name to an int. I am having problems with this.
Any Help Please
Thanks

I'm going to assume that reading the information out of the file is already done so we'll press on with the rest of it.
There's the cheap and easy solution
1. Read the values from the row in the file into four variables
String homeTeamName
int homeTeamScore
String visitingTeamName
int visitingTeamScore
if(homeTeamScore > visitingTeamScore){
    // Deal with the home team winning
else if(homeTeamScore < visitingTeamScore){
    // Deal with the visiting team winning
else{
    // Deal with a tie
}No rocket science involved.
Now, then there's a more tidy and graceful way to do it.
The Team class holds information relevant to the team
public class Team
    private String teamName ;
    private boolean homeTeam ;
    private int score ;
    // Don't forget accessors and mutators
}The Game class holds among other things two instances of the Team class and a method to determine who won.
public class Game
    private Team home ;
    private Team visitor ;
    // Probably lots of other stuff but here's the relevant part
    public Team getWinner() throws TieScoreException
        if(home.getScore() == visitor.getScore())
            throw new TieScoreException() ;
        else if(home.getScore() > visitor.getScore())
            return home ;
        else
            return visitor ;
}Now obviously there would be a lot more to do but this gives you A framework in which to think. I likely wouldn't model it exactly this way but it's the first arrangement that my brain spat up and it gives you something to think about.
Hope this helps,
PS.

Converting a string to several int.

Hi I am having trouble getting a string to several integers. I have a String that looks like this: N163644. I need three integers with the numbers 16, 36 and 44 for further calculations. I have tried converting to char[] and then to int but it most be an easier way.
thankful for all help.

It works fine with this code.
int degLat = Integer.parseInt(lat1.substring(1,3));
Thanks..

How to convert a string to an int?

Call me stupid but I can't find it in the documentation.
The String in question will always contain a number between 1 and 100.
Thanks in advance.

umm say ur string is CH...
u'd go...
ch=br.readLine ();
int=Integer.parseInt(ch);
man i feel smart... see if any1 can help me out. hahaha... my question is like a few threads ahead. :D

Incompatible types - found java.lang.String but expected int

This is an extremely small simple program but i keep getting an "incompatible types - found java.lang.String but expected int" error and dont understand why. Im still pretty new to Java so it might just be something stupid im over looking...
import java.io.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class Lab
public static void main(String []args)
int input = JOptionPane.showInputDialog("Input Decimal ");
String bin = Integer.toBinaryString(input);
String hex = Integer.toHexString(input);
System.out.println("Decimal= " + input + '\n' + "Binary= " + bin + '\n' + "Hexadecimal " + hex);
}

You should always post the full, exact error message.
Your error message probably says that the error occurred on something like line #10, the JOptionPane line. The error is telling you that the compiler found a String value, but an int value was expected.
If you go to the API docs for JOptionPane, it will tell you what value type is returned for showInputDialog(). The value type is String. But you are trying to assign that value to an int. You can't do that.
You will need to assign the showInputDialog() value to a String variable. Then use Integer.parseInt(the_string) to convert to an int value.

How do I know if I can convert a String value to an int value or not?

Hi,
I want to know how to make the judgment that if I can convert a String value to an int value or not? Assume that I don't know the String is number or letters
Thank you

Encephalopathic wrote
Again, why?One of the problems (have been dued) in my codelab asks us to write a class as follow
Write a class definition of a class named 'Value' with the following:
a constructor accepting a single integer paramter
a constructor with no parameters
a method 'setVal' that accepts a single parameter,
a boolean method, 'wasModified' that returns true if setVal was ever called for the object.
a method 'getVal' that returns an integer value as follows: if setVal has ever been called, it getVal returns the last value passed to setVal. Otherwise if the "single int parameter" constructor was used to create the object, getVal returns the value passed to that constructor. Otherwise getVal returns 0.
The setVal(int y) returns nothing, so how do I know whether it has been called or not?
Thank you

Converting a Hex String to an Int

I have a quick question. I am attempting to encode an Integer as a Hex String using Integer.toHexString(), which produces a max of eight hex characters.
I then need to convert this string back to an integer. I tried using Integer.parseInt(string, 16), but this only works for positive integers, because it expects a negative number to be designated with a "-" sign, which is the behavior of Integer.toString(int, 16).
I do not wish to represent the "-" sign in that manner, because I want to minimize the length of the hex string.
This method is time-critical, and I would like it to be as simple as possible, so I am looking for a solution in the standard libraries. Does anybody know of a method to convert the eight character hex representation which includes the sign bit as part of the eighth character back to an int using a method provided by the libraries?

int intVal = (int)Long.parseLong(str, 16);

Converting string to an int

hi,
is there anyway i can easily convert a string into a long int.
I have an id string which consists of 11 characters, the first 3 are used to identify the type. the last 8 are numbers that need to go in a sequence.
Eg, 44400000001, next would be 44400000002 and so on.
i can break the string into two, but when i convert the last part into an int it does not keep the 0s. i need the length of this int to remain 8.
thanks
Shazan
Edited by: shazan on Apr 24, 2008 11:27 AM

shazan wrote:
...but when i convert the last part into an int it does not keep the 0s. i need the length of this int to remain 8.
How do you mean, keep the zeros?
int is short for integer, it doesn't have length as in number of characters...
What about keeping the last part as String as well and converting it inside the calculations (or whatever you're doing)... or maybe convert it and do what you're doing and then convert it back to String with padded zeros?

Converting Oracle XML Query Result in Java String by using XSU

Hi,
I have a problem by converting Oracle XML Query Result in Java
String by using XSU. I use XSU for Java.
For example:
String datum=new OracleXMLQuery(conn,"Select max(ps.datum) from
preise ps where match='"+args[0]+"'");
String datum1=datum;
I become the following error:
Prototyp.java:47: Incompatible type for declaration. Can't
convert oracle.xml.sql.query.OracleXMLQuery to java.lang.String.
Can somebody tell me a method() for converting to solve my
problem??????
Thanks

Hmmm.. Pretty basic just look at the example:
OracleXMLQuery qry = new OracleXMLQuery(conn,"Select max(ps.datum) from preise ps where match='"+args[0]+"'");
String xmlString = qry.getXMLString();
Hi,
I have a problem by converting Oracle XML Query Result in Java
String by using XSU. I use XSU for Java.
For example:
String datum=new OracleXMLQuery(conn,"Select max(ps.datum) from
preise ps where match='"+args[0]+"'");
String datum1=datum;
I become the following error:
Prototyp.java:47: Incompatible type for declaration. Can't
convert oracle.xml.sql.query.OracleXMLQuery to java.lang.String.
Can somebody tell me a method() for converting to solve my
problem??????
Thanks

Convert from String to Int

Hi,
I have a question.
How do I convert from String to Integer?
Here is my code:
try{
String s="000111010101001101101010";
int q=Integer.parseInt(s);
answerStr = String.valueOf(q);
catch (NumberFormatException e)
answerStr="Error";
but, everytime when i run the code, i always get the ERROR.
is the value that i got, cannot be converted to int?
i've done the same thing in c, and its working fine.
thanks..

6kyAngel wrote:
actually it convert the string value into decimal value.In fact what it does is convert the (binary) string into an integer value. It's the String representation of integer quantities that have a base (two, ten, hex etc): the quantities themselves don't have a base.
To take an integer quantity (in the form of an int) and convert it to a binary String, use the handy toString() method in the Integer class - like your other conversion, use the one that takes a radix argument.

Convert a string to JAva.sql.date..

I am having a string with the value as follows..
String fval="03-10-2001"..
I am using this value in a rs.updateDate method where I need to convert it to a different format as
2001-10-03...can anybody give me the syntax..

You should hold dates as Date instances. But if you want to convert between Strings and Dates then you should use a DateFormat:
String originalDateString = "31-10-2001";
// Convert the original string to a date
DateFormat originalDateFormat = new SimpleDateFormat("dd-MM-yyyy");
Date date = originalDateFormat.parse(originalDateString);
// Get a representation of the date in the new format
DateFormat newDateFormat = new SimpleDateFormat("yyyy-MM-dd");
String newDateString = newDateFormat.format(date);(Excuse the quirky formatting that the Java code filter applies!)
Hope this helps.

Convert a String to java.sql.Date Format

Hi,
I am having a String of containing date in the format 'dd/mm/yyyy' OR 'dd-MMM-YYYY' OR 'mm-dd-yyyy' format. I need to convert the string to java.sql.Date object so that I can perform a query the database for the date field. Can any one suggest me with the code please.
Regards,
Smitha

import java.text.SimpleDateFormat;
import java.text.ParseException;
import java.util.Date;
public class TestDateFormat
     public static void main(String args[])
          SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");
          System.out.println(sdf.isLenient());
          try
               Date d1 = sdf.parse("07-11-2001");
               System.out.println(d1);
               Date d2 = sdf.parse("07:11:2001");
               System.out.println(d2);
          catch(ParseException e)
               System.out.println("Error format, " + e);
See class DateFormat and SimpleDateFormat for detail.

Need help to convert this format of string in a int value?

public static int isNumber( String number, int defaultValue ) {
          int result;
          try {
               result = Integer.parseInt(number);
          } catch( Exception e ) {
               result = defaultValue;
          return result;
     }Hi, I have the above method that converts a string Number into a int value. It works fine if the string is a normal number 234 (without spaces) but I have a string in the following format:
*(space)�23,000(space).*
That is I have a "space" then a "Pound" sign then two numbers then a comma followed by three numbers and then a space again.
Is there any way I can convert this format into a simple int value?
Thanks for any guidance.
Zub

Hi, I tried the following code but it don't seem to work
     public static int isNumberTrimSpaces( String number, int defaultValue ) {
          number.trim();
          String parsed = "";
          for (int i = 0 ; i < number.length() && number.charAt(i) != ',' ; i++)
         if (Character.isDigit(number.charAt(i))) {
         parsed += number.charAt(i);}
          int result;
          try {
               result = Integer.parseInt(number);
          } catch( Exception e ) {
               result = defaultValue;
          return result;
     }Any Ideas? Also will the loop get rid of the pound sign?

Converting a String to an Int???? (Java)

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