Making a string into an int.

I am trying to make a string like this into an integer.
String a = "There are (3) cows in the field.";But if I use:
int myInt = Integer.parseInt(a);Will it just retrieve the 3 in the string? If not how would I get the 3 out of the string?
Josh

Deadfrog wrote:
I am trying to make a string like this into an integer.
String a = "There are (3) cows in the field.";But if I use:
int myInt = Integer.parseInt(a);Will it just retrieve the 3 in the string? How would it do that? The answer is "no", but you're free to try it. It'll be a learning experience.
If not how would I get the 3 out of the string?maybe a parser or a regular expression would do the trick. I'd try the latter first.
%

Similar Messages

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;
}

Java.lang.NullPointerException by parsing a string into an int

Hi,
I am trying to call a method with the first argument as an int.
I have successfully tested to call it with normal int, it works.
The problem is that the int i need to send has first to be casted from a string ( a jtext field basically)
what i do is :
destAddrInt = (int)Integer.parseInt(destAddr.trim());
this.sendCommand(destAddrInt , cmdShortArray);but what ever i try it will not work, i always get the java.lang.NullPointerException.
i have even tried to copy the value into an int:
destAddrInt = (int)Integer.parseInt(destAddr.trim());
int dum;
dum = destAddrInt;
this.sendCommand(dum, cmdShortArray);What can I do?
Thanks for your help!

Why do you need to typecast the int again into an integer after you have parsed it?This was actually my last try (I did several tries to find a solution)!
Ok, know I did follow the stack trace with ex.printStackTrace(); and found that the exception was afterward (some uninitialized Set).
And now it work, and of course even with
Integer.parseInt(destAddr.trim())
If I had to guess, I'd say it's in the call to the trim() method on destAddr.Trim has not be a problem).
Thanks for your help!

String into int & vice versa

Hi all
i cant convert the String into int although using
Integer.parseInt & vice versa
any ideas
here is the code
// fontCB & styleCB & sizeCB are ComboBoxes
String fontName,fontStyle,fontSize;
int fontStyleInt=1,fontSizeInt=1;
fontName                = (String)fontCB.getSelectedItem();
fontStyle               = (String)styleCB.getSelectedItem();
fontSize               = (String)sizeCB.getSelectedItem();
try
fontStyleInt      = Integer.parseInt(fontStyle);
fontSizeInt      = Integer.parseInt(fontSize);
catch (NumberFormatException nfe)
System.out.println("I'm an error");
Font fontTemp           = new Font(fontName,fontStyleInt,fontSizeInt);
myTextArea.setFont(fontTemp);

The getSelectedItem() method returns a type called "Object". Therefore, to convert it to a string, u have to use String.valueOf(fontCB.getSelectedItem);Font styles are integers, i.e. PLAIN=0, BOLD=1, ITALIC=2, BOLD & ITALIC =3
So, u can do the following,
String styles={"Plain","Bold","Italics","Bold and Italics"};
styleCB=new JComboBox(styles);To get the appropriate style, all u have to do is:
int style=styleCB.getSelectedIndex();As for the font size,
int size=Integer.parseInt(String.valueOf(sizeCB.getSelectedItem()));I think u r having plans for a text editor. right?

Issue with splitting string into multiple lines

Hi Experts,
I have a long string s. I want to split this string into several lines each having 72 characters. For this I have done following programming:
     String s = "For the first time it includes a supplementary report attempting to determine if extreme weather
events can be linked to human-induced climate change. The research team, including members
of the UK Met Office, identified recent episodes of extreme weather then used a computer to
estimate the likelihood of the episode happening in a world without increased CO2." ;
     s = s.replaceAll("[\r\n]+", " ");
     char[] sAr = s.toCharArray();
     AbstractList RecepitsList7 = new Bapitrtext.Bapitrtext_List();;
     int start = 0; // start with
     int i = 72 ;
//     for (int i = 71; i < sAr.length; i++) {
while (i < sAr.length) {
//     {     if (sAr[i] == ' ')
               Bapitrtext Recepits7 = new Bapitrtext();
               Recepits7.setTextid("TEXT");
               Recepits7.setTextline(s.substring(start, i).replaceAll("[\r\n]+", ""));
               RecepitsList7.add(Recepits7);
               start = i+1;
               i += 72;
     input.setText(RecepitsList7);
The output of program is as below:
For the first time it includes a supplementary report attempting to dete
mine if extreme weather events can be linked to human-induced climate
hange. The research team, including members of the UK Met Office, iden
ified recent episodes of extreme weather then used a computer to estim
te the likelihood of the episode happening in a world without increased
Here as we can see last characters are getting deleted by program. For example in first line
determine 'r' is missing in extreme right.
In 3rd line c is missing in extreme left (word change is needed. Program
prints hange.
Also in 3rd line extreme right 't' is missing
Also in 4th line extreme right 'a' is missing
Also the last line is not being printed. In last line "CO2." " should appear.
There are two issues:
1. Why last word of each sentence is not being printed?
2. Why last sentence is not being printed?
I am struggling since last 2 days. Please help. I made all changes like replacing 72 by 71 etc.
By making such changes, I am able to print first line correctly. However under all cases
last character of 2nd line onward is not getting displayed.
Also last line is not getting displayed. I did every thing like using while instead of for loop etc.
Kindly help.
Regards,
Gary
Edited by: 945655 on Jul 10, 2012 11:39 PM

String s = wdContext.currentContextElement().getExpense_Text();
     s = s.replaceAll("[\r\n]+", " ");
     char[] sAr = s.toCharArray();
     AbstractList RecepitsList7 = new Bapitrtext.Bapitrtext_List();;
     int start = 0; // start with
     int i = 72;
while (i < sAr.length) {
               Bapitrtext Recepits7 = new Bapitrtext();
               Recepits7.setTextid("TEXT");
               System.out.println(s.substring(start, i));
               RecepitsList7.add(Recepits7);
               start = i+1;
               i += 72;
     input.setText(RecepitsList7);
Edited by: 945655 on Jul 11, 2012 2:25 AM

How can i write a string into a specified pos of a file?

How can i write a string into a specified pos of a file without read all file into ram and write the whole file again?
for example:
the content of file is:
name=123
state=456
i want to modify the value of name with 789
(write to file without read all file into ram)
How can i do it? thank you

take this as an idea. it actually does what i decribed above. you sure need to make some modifications so it works for your special need. If you use it and add any valuable code to it or find any bugs, please let me know.
import java.io.*;
import java.util.*;
* Copyright (c) 2002 Frank Fischer <[email protected]>
* All rights reserved. See the LICENSE for usage conditions
* ObjectProperties.java
* version 1.0, 2002-09-12
* author Frank Fischer <[email protected]>
public class ObjectProperties
     // the seperator between the param-name and the value in the prooperties file
     private static final String separator = "=";
     // the vector where we put the arrays in
     private Vector PropertiesSet;
     // the array where we put the param/value pairs in
     private String propvaluepair[][];
     // the name of the object the properties file is for
     public String ObjectPropertiesFileName;
     // the path to the object'a properties file
     public String ObjectPropertiesDir;
     // reference to the properties file
     public File PropertiesFile;
     // sign for linebreak - depends on platforms
     public static final String newline = System.getProperty("line.separator");
     public ObjectProperties(String ObjectPropertiesFileName, String ObjectPropertiesDir, ObjectPropertiesManager ObjectPropertiesManager)
     //     System.out.println("Properties Objekt wird erzeugt: "+ObjectPropertiesFileName);
          this.ObjectPropertiesFileName = ObjectPropertiesFileName;
          this.ObjectPropertiesDir = ObjectPropertiesDir;
          // reference to the properties file
          PropertiesFile = new File(ObjectPropertiesDir+ObjectPropertiesFileName);
          // vector to put the param/value pair-array in
          PropertiesSet = new Vector();
     //     System.out.println("Properties File Backup wird erzeugt: "+name);
          backup();
     //     System.out.println("Properties File wird eingelesen: "+PropertiesFile);
          try
               //opening stream to file for read operations
               FileInputStream FileInput = new FileInputStream(PropertiesFile);
               DataInputStream DataInput = new DataInputStream(FileInput);
               String line = "";
               //reading line after line of the properties file
               while ((line = DataInput.readLine()) != null)
                    //just making sure there are no whitespaces at the beginng or end of the line
                    line = cutSpaces(line);
                    if (line.length() > 0)
                         //$ indicates a param-name
                         if (line.startsWith("$"))
                              // array to store a param/value pair in
                              propvaluepair = new String[1][2];
                              //get the param-name
                              String parameter = line.substring(1, line.indexOf(separator)-1);
                              //just making sure there are no whitespaces at the beginng or end of the variable
                              parameter = cutSpaces(parameter);
                              //get the value
                              String value = line.substring(line.indexOf(separator)+1, line.length());
                              //just making sure there are no whitespaces at the beginng or end of the variable
                              value = cutSpaces(value);
                              //put the param-name and the value into an array
                              propvaluepair[0][0] = parameter;
                              propvaluepair[0][1] = value;
                         //     System.out.println("["+ObjectPropertiesFileName+"] key/value gefunden:"+parameter+";"+value);
                              //and finaly put the array into the vector
                              PropertiesSet.addElement(propvaluepair);
          // error handlig
          catch (IOException e)
               System.out.println("ERROR occured while reading property file for: "+ObjectPropertiesFileName);
               System.out.println("ERROR CODE: "+e);
               // System.out.println("in ObjectProperties");
     // function to be called to get the value of a specific paramater 'param'
     // if the specific paramater is not found '-1' is returned to indicate that case
     public String getParam(String param)
          // the return value indicating that the param we are searching for is not found
          String v = "-1";
          // looking up the whole Vector
          for (int i=0; i<PropertiesSet.size(); i++)
               //the String i want to read the values in again
               String s[][] = new String[1][2];
               // trying to get out the array from the vector again
               s = (String[][]) PropertiesSet.elementAt(i);
               // comparing the param-name we're looking for with the param-name in the array we took out the vector at position i
               if (s[0][0].equals(param) == true)
                    //if the param-names are the same, we look up the value and write it in the return variable
                    v = s[0][1];
                    // making sure the for loop ends
                    i = PropertiesSet.size();
          // giving the value back to the calling procedure
          return v;
     // function to be called to set the value of a specific paramater 'param'
     public void setParam(String param, String value)
          // looking up the whole Vector for the specific param if existing or not
          for (int i=0; i<PropertiesSet.size(); i++)
               //the String i want to read the values in again
               String s[][] = (String[][]) PropertiesSet.elementAt(i);
               // comparing the param-name we're looking for with the param-name in the array we took out the vector at position i
               if (s[0][0].equals(param) == true)
                    //if the param-names are the same, we remove the param/value pair so we can add the new pair later in
                    PropertiesSet.removeElementAt(i);
                    // making sure the for loop ends
                    i = PropertiesSet.size();
          // if we land here, there is no such param in the Vector, either there was none form the beginng
          // or there was one but we took it out.
          // create a string array to place the param/value pair in
          String n[][] = new String[1][2];
          // add the param/value par
          n[0][0] = param;
          n[0][1] = value;
          // add the string array to the vector
          PropertiesSet.addElement(n);
     // function to save all data in the Vector to the properties file
     // must be done because properties might be changing while runtime
     // and changes are just hold in memory while runntime
     public void store()
          backup();
          String outtofile = "# file created/modified on "+createDate("-")+" "+createTime("-")+newline+newline;
          try
               //opening stream to file for write operations
               FileOutputStream PropertiesFileOuput = new FileOutputStream(PropertiesFile);
               DataOutputStream PropertiesDataOutput = new DataOutputStream(PropertiesFileOuput);
               // looping over all param/value pairs in the vector
               for (int i=0; i<PropertiesSet.size(); i++)
                    //the String i want to read the values in
                    String s[][] = new String[1][2];
                    // trying to get out the array from the vector again
                    s = (String[][]) PropertiesSet.elementAt(i);
                    String param = "$"+s[0][0];
                    String value = s[0][1];
                    outtofile += param+" = "+value+newline;
               outtofile += newline+"#end of file"+newline;
               try
                    PropertiesDataOutput.writeBytes(outtofile);
               catch (IOException e)
                    System.out.println("ERROR while writing to Properties File: "+e);
          catch (IOException e)
               System.out.println("ERROR occured while writing to the property file for: "+ObjectPropertiesFileName);
               System.out.println("ERROR CODE: "+e);
     // sometimes before overwritting old value it's a good idea to backup old values
     public void backup()
          try
               // reference to the original properties file
               File OriginalFile = new File(ObjectPropertiesDir+ObjectPropertiesFileName);
               File BackupFile = new File(ObjectPropertiesDir+"/backup/"+ObjectPropertiesFileName+".backup");
               //opening stream to original file for read operations
               FileInputStream OriginalFileInput = new FileInputStream(OriginalFile);
               DataInputStream OriginalFileDataInput = new DataInputStream(OriginalFileInput);
               //opening stream to backup file for write operations
               FileOutputStream BackupFileOutput = new FileOutputStream(BackupFile);
               DataOutputStream BackupFileDataOutput = new DataOutputStream(BackupFileOutput);
          //     String content = "";
               String line = "";
               // do till end of file
               while ((line = OriginalFileDataInput.readLine()) != null)
                    BackupFileDataOutput.writeBytes(line+newline);
          // error handlig
          catch (IOException e)
               System.out.println("ERROR occured while back up for property file: "+ObjectPropertiesFileName);
               System.out.println("ERROR CODE: "+e);
               System.out.println("this is a serious error - the server must be stopped");
     private String cutSpaces(String s)
          while (s.startsWith(" "))
               s = s.substring(1, s.length());
          while (s.endsWith(" "))
               s = s.substring(0, s.length()-1);
          return s;
     public String createDate(String seperator)
          Date datum = new Date();
          String currentdatum = new String();
          int year, month, date;
          year = datum.getYear()+1900;
          month = datum.getMonth()+1;
          date = datum.getDate();
          currentdatum = ""+year+seperator;
          if (month < 10)
               currentdatum = currentdatum+"0"+month+seperator;
          else
               currentdatum = currentdatum+month+seperator;
          if (date < 10)
               currentdatum = currentdatum+"0"+date;
          else
               currentdatum = currentdatum+date;
          return currentdatum;
     public String createTime(String seperator)
          Date time = new Date();
          String currenttime = new String();
          int hours, minutes, seconds;
          hours = time.getHours();
          minutes = time.getMinutes();
          seconds = time.getSeconds();
          if (hours < 10)
               currenttime = currenttime+"0"+hours+seperator;
          else
               currenttime = currenttime+hours+seperator;
          if (minutes < 10)
               currenttime = currenttime+"0"+minutes+seperator;
          else
               currenttime = currenttime+minutes+seperator;
          if (seconds < 10)
               currenttime = currenttime+"0"+seconds;
          else
               currenttime = currenttime+seconds;
          return currenttime;

How can i store values from my String into Array

Hi guys
i wants to store all the values from my string into an array,,,, after converting them into intergers,,,, how i can do this becs i have a peice of code which just give me a value of a character at time,,,,charat(2)...BUT i want to the values from String to store in an Array
here is my peice of code which i m using for 1 char at time
int[] ExampleArray2 = new int[24];
String tempci = "Battle of Midway";
for(int i=0;i>=tempci.length();i++)
int ascii = tempci.charAt(i); //Get ascii value for the first character.

public class d1
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How can I put a stl::vector string into the DB and then get it out?

Hello,
As the title, here's a test case with problems,but anyway you can still run it. ( VC6/XP-32/BDB 4.7 )
I know this may be wrong,and I'd like to know how can I do this.
Can someone help me please? I would appreciate it very much.
************ Copy,Compile and Run ***************
#include <iostream>
#include <vector>
#include "db_cxx.h"
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Regards,
legendsino

You need to convert the std::vector<std::string> into a sequence of bytes. For example, if all strings are shorter than 256 characters, you could create a fresh output string, iterator through the vector, and for each element, append the string length to the output string, followed by the string contents.
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I have a bit of code that collects data values from a bean and I want it to then insert this into a mySQL database. My string is in the format "23/12/1983", how can i put this into a date field in my database? The bit of code I have got so far looks like this...
String month = formHandler.month + "/";
String day = formHandler.day + "/";
String year = formHandler.year ;
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Limo2kz,
The key to inserting a date into a database is to convert the date string into an SQL friendly format. i.e. yyyy-MM-dd.
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SimpleDateFormat NICE_DATE_FORMAT =
new SimpleDateFormat("dd/MM/yyyy");
SimpleDateFormat SQL_DATE_FORMAT =
new SimpleDateFormat("yyyy-MM-dd");
Date date = new Date();
try {
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} catch (ParseException pe) {
pe.printStackTrace();
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How do I convert a string into a decimal

I've been tryin to convert a string into decimal but I can't get it to work at all. I keep getting an exception.
I've tried all of these:
double myDouble = Double.valueOf(string).doubleValue();
int myint = Interger.parseInt(string);
float myfloat = Float.parseFloat(string);
I can't get anything to work.
That string i'm reading in is an array containing values with decimals. ex: -45.09348
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Thanks!

This works for me:String s = "-45.6789";
double d = Double.parseDouble(s);
System.out.println(d);Mark

How can I convert a String into boolean?

I am facing difficulty in converting String into boolean.
For example, I have a few variable which i need user to input yes or no as the answer. But I uses string instead. Is there a way which i can ask them to input boolean directly?
Please advise...
credit = JOptionPane.showInputDialog("Enter Yes or No for Credit Satisfactory : ");
System.out.println("The answer for Credit Satisfactory : "+credit);
e_invtry=JOptionPane.showInputDialog("Enter Yes or No for inventry level");
System.out.println("The answer for Quantity Order : "+e_invtry);
Message was edited by:
SummerCool

Thanks...but I don't get it....I tried to use your
suggestion but i got the message that " cannot find
symbol method
showConfirmDialog(java.lang.String,int)" ???
Please advise.
The code I use was :
int credit = JOptionPane.showConfirmDialog("Enter Yes
or No for credit satisfactory",
JOptionPane.YES_NO_OPTION);Well that was not the example I gave you.
JOptionPane has no method showConfirmDialog that receives a String and an int (exactly what the error message is telling you).
What was wrong with the version I showed you?

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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?

Memory leak in String(byte[] bytes, int offset, int length)

Has anyone run into memory leak problem using this String(byte[] bytes, int offset, int length) class? I am using it to convert byte array to string, and I am showing memory leak using this class. Any idea what is going on?

Hi,
If you post in Native methods forum I assume you are using this constructor in the native side.
Be aware that getting char * from jstring eats memory that you must free before returning from native with env->ReleaseStringUTFChars().
--Marc (http://jnative.sf.net)

4 bytes into one int

Hi, I have four bytes in my program, I'd add them together somehow so that i have a 32bit string, how can I do this?
I tried adding them together and storing into an int but when i tried to do bit shifting I got an unexpected result.
int x = byte[0] + byte[1] + byte[2] + byte[3];Where am i going wrong?
thx
Edited by: Unconditional on Jan 25, 2008 12:35 PM

You need to use bit shifting. However, you need to decide whether [0] is the high byte or the low byte (big-endian or little-endian).
EDIT: Also, "32bit string"? You mean "32-bit int" right?
Edited by: paul.miner on Jan 25, 2008 2:39 PM

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mt = JsonConvert.DeserializeObject<MyTable>(jsonStr.ToString());
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Assembly 'newtonsoft.json, version=4.5.0.0, culture=neutral, publickeytoken=30ad4fe6b2a6aeed.' was not found in the SQL catalog.
(I have Newtonsoft.Json in the Reference)
Please help !
Thanks

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Error: SQL72014: .Net SqlClient Data Provider: Msg 6503, Level 16, State 12, Line 1 Assembly 'newtonsoft.json, version=6.0.0.0, culture=neutral, publickeytoken=30ad4fe6b2a6aeed.' was not found in the SQL catalog.
ALTER ASSEMBLY [Database1]
FROM 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
An error occurred while the batch was being executed.
Done building project "Database1.sqlproj" -- FAILED.
This is my FillRow function. Without the bold line, the everything is fine. I can create the assembly, then create the SQL function. Done. When I call select from the SQL function, it returns 10 rows as expected.
public static IEnumerable getTable(SqlString jsonStr)
ArrayList resultCollection = new ArrayList();
MyTable mt;
//mt = JsonConvert.DeserializeObject<MyTable>(jsonStr.ToString());
int c = 1;
while (c < 10)
mt = new MyTable();
mt.GlobalId = c.ToString();
mt.DateSet = "DS=!=" + c.ToString();
mt.Timestamp = "TS==" + c.ToString();
mt.PartnerId = "PI==" + c.ToString();
mt.PartnerUserId = "PUI=" + c.ToString();
mt.UserIP = "UIP=" + c.ToString();
mt.UserAgent = "UG=" + c.ToString();
mt.Referer = "R=" + c.ToString();
resultCollection.Add(mt);
c++;
//resultCollection.Add(mt);
return resultCollection;

Making a string into an int.

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