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.Array IndexOutOfBound sException: 1
at konta_bankowe.U zytkownik.login (Uzytkownik.jav a)
at konta_bankowe.K onto.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.Array IndexOutOfBound sException: 1
at konta_bankowe.U zytkownik.login (Uzytkownik.jav a)
at konta_bankowe.K onto.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.