ArrayIndexOutOfBoundsException

[oll3i]

Hi!
i just started learning java ;]
i wanna write bank accounts program
i get an error i know its in login method but i dont know where :\
cd u please help me with this one

the code below reads user data from a file then sets the vars declared in a class

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
at konta_bankowe.Uzytkownik.login(Uzytkownik.java)
at konta_bankowe.Konto.main(Konto.java)

my code for user

package konta_bankowe;
 
 
import java.io.*;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;
import java.io.IOException;
import java.util.*;
import javax.swing.*;
 
public class Uzytkownik {
    private String  IDuzytkownika;
    private String haslo;
    private String numerKonta;
    private String imie;
    private String nazwisko;
 
 
     public Uzytkownik(){};
 
    public void setUserID(String id){
        IDuzytkownika=id;
    }
 
    public void setHaslo(String h){
        haslo=h;
    }
 
    private void setNumerKonta(String n_k){
    numerKonta    =n_k;
    }
 
    private void setImie(String i){
        imie=i;
        }
    private void setNazwisko(String n){
        nazwisko=n;
        }
 
    public void displayUserData(){
System.out.println("Numer konta"+numerKonta+" "+imie+" "+nazwisko);
        }
 
public boolean login(){
     Map<String,String> map = new HashMap<String,String>();
 
        try{
            // Open the file that is the first 
            // command line parameter
            FileInputStream fstream = new FileInputStream(IDuzytkownika+".txt");
            // Get the object of DataInputStream
            DataInputStream in = new DataInputStream(fstream);
                BufferedReader br = new BufferedReader(new InputStreamReader(in));
            String strLine;
 
 
 
          while((strLine = br.readLine()) != null)   {   
          String[] dane=strLine.split(":"); 
          map.put(dane[0],dane[1]);
          }
            in.close();
          }catch (FileNotFoundException e) {
                System.err.println("Nie ma takiego uzytkownika(File not found!)");
          }catch (IOException e) {
                  System.err.println(e);}
 
 
 
if((map.get("id")==IDuzytkownika) && (map.get("haslo")==haslo)){
 
 
 
 
 
 
               String numer_konta=map.get("numer konta");
               String i=map.get("imie");
               String n=map.get("nazwisko");
 
 
               setNumerKonta(numer_konta);
               setImie(i);
               setNazwisko(n);
              return  true;
            }else{return false;}
}
}

[horace1]

you don't appear to have included your main()

[r035198x]

Hi!
i just started learning java ;]
i wanna write bank accounts program
i get an error i know its in login method but i dont know where :\
cd u please help me with this one

the code below reads user data from a file then sets the vars declared in a class

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
at konta_bankowe.Uzytkownik.login(Uzytkownik.java)
at konta_bankowe.Konto.main(Konto.java)

my code for user

package konta_bankowe;
 
 
import java.io.*;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;
import java.io.IOException;
import java.util.*;
import javax.swing.*;
 
public class Uzytkownik {
    private String IDuzytkownika;
    private String haslo;
    private String numerKonta;
    private String imie;
    private String nazwisko;
 
 
     public Uzytkownik(){};
 
    public void setUserID(String id){
        IDuzytkownika=id;
    }
 
    public void setHaslo(String h){
        haslo=h;
    }
 
    private void setNumerKonta(String n_k){
    numerKonta    =n_k;
    }
 
    private void setImie(String i){
        imie=i;
        }
    private void setNazwisko(String n){
        nazwisko=n;
        }
 
    public void displayUserData(){
System.out.println("Numer konta"+numerKonta+" "+imie+" "+nazwisko);
        }
 
public boolean login(){
Map<String,String> map = new HashMap<String,String>();
 
        try{
         // Open the file that is the first 
         // command line parameter
         FileInputStream fstream = new FileInputStream(IDuzytkownika+".txt");
         // Get the object of DataInputStream
         DataInputStream in = new DataInputStream(fstream);
         BufferedReader br = new BufferedReader(new InputStreamReader(in));
         String strLine;
 
 
 
         while((strLine = br.readLine()) != null) { 
         String[] dane=strLine.split(":"); 
         map.put(dane[0],dane[1]);
         }
         in.close();
         }catch (FileNotFoundException e) {
             System.err.println("Nie ma takiego uzytkownika(File not found!)");
         }catch (IOException e) {
         System.err.println(e);}
 
 
 
if((map.get("id")==IDuzytkownika) && (map.get("haslo")==haslo)){
 
 
 
 
 
 
             String numer_konta=map.get("numer konta");
             String i=map.get("imie");
             String n=map.get("nazwisko");
 
 
             setNumerKonta(numer_konta);
             setImie(i);
             setNazwisko(n);
             return true;
            }else{return false;}
}
}

Here is the culprit code

String[] dane=strLine.split(":"); 
 

Creates an array of strings whose size depends on the number of ":" in the String strLine. In this case there are no ":" at all in that String (you can verify that by printing the strLine to console and see its value). So the array created has only one element at postion 0 and its length is therefore 1. When you then do

 map.put(dane[0],dane[1]);
 

You try to access positon 1 of the array which is not in the array and thus you get the exception.