Originally Posted by l_03

hello guyzz,,,i am almost finished with my code,,but our teacher require us to access a text file..this is it:

in my text file:

accountList.txt

12345 1234 200000 Jerry Lopez



first column was accountNumber, then the pinNumber, then the balance and the name..

what i did was...

import java.io.*;
public class BankAccount{

public void account(){

File ACCOUNT = new File ("accountList.txt");
FileReader fr = new FileReader(FROZEN);
Reader reader1 = new BufferedReader (fr);
LineNumberReader lnr = new LineNumberReader (reader1);
String line;
for (line = lnr.readLine(); line!=null; line = lnr.readLine()){

String account[] = new String[4];
int count = 0;


int accountNumber[] = Integer.parseInt(account[count][1]);
int pinNumber[] = Integer.parseInt(account[count][2];
int balance[] = Integer.parseInt(account[count][3];
String name = account[count][4];


System.out.println(accountNumber[0][1]);
}
}


i want to sysout the accountNumber,,which is
12345

it has no error when i run it,,but i dont really know what is the problem...

it only print out
0

and i dont know why zero,,,,it seems there is a problem when i declare it...

help guyzzz...i really need your help because we are about to pass it next week,,,,

"that is a shortcut,,i already have the main method.."

Originally Posted by javaAddict

Look at your code:

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for (line = lnr.readLine(); line!=null; line = lnr.readLine()){
 
String account[] = new String[4];
int count = 0;
 
 
int accountNumber[] = Integer.parseInt(account[count][1]);
int pinNumber[] = Integer.parseInt(account[count][2];
int balance[] = Integer.parseInt(account[count][3];
String name = account[count][4];
 
 
System.out.println(accountNumber[0][1]);
}

for (line = lnr.readLine(); line!=null; line = lnr.readLine()){ String account[] = new String[4]; int count = 0; int accountNumber[] = Integer.parseInt(account[count][1]); int pinNumber[] = Integer.parseInt(account[count][2]; int balance[] = Integer.parseInt(account[count][3]; String name = account[count][4]; System.out.println(accountNumber[0][1]); }

You read the line BUT inside the loop you don't do anything with it. Instead you call this:
Integer.parseInt(account[count][1]); .
The account array is not 2-D and the Integer.parseInt does not return an array.


Now inside the line you have something like this:
12345 1234 200000 Jerry Lopez

So If you use the split method:

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String [] array = line.split(" ");

String [] array = line.split(" ");

The elements of the array would be:
0: 12345
1: 1234
2: 200000
3: Jerry
4: Lopez

Also for reading from a file try this shorter version:

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BufferedReader lnr = new BufferedReader (new FileReader("accountList.txt"));

BufferedReader lnr = new BufferedReader (new FileReader("accountList.txt"));

Originally Posted by javaAddict

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for (line = lnr.readLine(); line!=null; line = lnr.readLine()){
 
String account[] = line.split(" ");
 
//print whatever you want
//and do whatever you want with the elements:
//account[0], account[1], account[2], account[3], account[4]
 
}

for (line = lnr.readLine(); line!=null; line = lnr.readLine()){ String account[] = line.split(" "); //print whatever you want //and do whatever you want with the elements: //account[0], account[1], account[2], account[3], account[4] }

Originally Posted by javaAddict

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for (line = lnr.readLine(); line!=null; line = lnr.readLine()){
 
String account[] = line.split(" ");
 
//print whatever you want
//and do whatever you want with the elements:
//account[0], account[1], account[2], account[3], account[4]
 
}

for (line = lnr.readLine(); line!=null; line = lnr.readLine()){ String account[] = line.split(" "); //print whatever you want //and do whatever you want with the elements: //account[0], account[1], account[2], account[3], account[4] }

12345 1234 200000 Jerry Lopez
55555 1234 200000 Jerry Lopez