hi all, help needed!

[javanooby]

Hi, I have this code :

 public class test2 
{
 
 
public static void readAccounts()
{
reader1 r = new reader1();
r.readIt();
}
 
public static void main(String args[])
 
    throws java.io.IOException, java.io.FileNotFoundException
    {
String str = ""
;
String[] lines = str.split ("\\&");
for (int i=0; i < lines.length; i++)
{
 
}
}
}
 

Ok the readAccounts method links to another class:

 { 
void readIt()
{
printFile("account.txt");
 
 
}
 
void printFile(String fileName)
{
String[] lines = LineIO.readAllLines(fileName);
for (String l : lines)
{
System.out.println(l);
}
}
 
}
 

which reads a text file. My question is how do I get my 1st piece of code to split the strings in the text file? Im stupidly stuck pon this so any help would be welcome!

Thankyou god like people!

[r035198x]

Hi, I have this code :

public class test2
{


public static void readAccounts()
{
reader1 r = new reader1();
r.readIt();
}

public static void main(String args[])

throws java.io.IOException, java.io.FileNotFoundException
{
String str = ""
;
String[] lines = str.split ("\\&");
for (int i=0; i < lines.length; i++)
{

}
}
}

Ok the readAccounts method links to another class:

{
void readIt()
{
printFile("account.txt");


}

void printFile(String fileName)
{
String[] lines = LineIO.readAllLines(fileName);
for (String l : lines)
{
System.out.println(l);
}
}

}

which reads a text file. My question is how do I get my 1st piece of code to split the strings in the text file? Im stupidly stuck pon this so any help would be welcome!

Thankyou god like people!

How do you want to split the strings? eg to split a string on space use str.split(" ");

[javanooby]

How do you want to split the strings? eg to split a string on space use str.split(" ");

sorry, should have specified. The data is seperated by ampersans (&), some of the strings contain numbers which I need toi be able to work with later.

Thanks

[r035198x]

sorry, should have specified. The data is seperated by ampersans (&), some of the strings contain numbers which I need toi be able to work with later.

Thanks

Then use str.split("&");

[javanooby]

Then use str.split("&");

Sorry think I may have said something confusing here. I have the code working as it stands. What I want to know is how I now can use the strings gathered from the text files, for instance there are two different accounts in the text file, say I want to print the account names on screen, how do I get the information from the strings? This is where I am stuck.

Thankyou

[r035198x]

Sorry think I may have said something confusing here. I have the code working as it stands. What I want to know is how I now can use the strings gathered from the text files, for instance there are two different accounts in the text file, say I want to print the account names on screen, how do I get the information from the strings? This is where I am stuck.

Thankyou

Do you want code for reading a file's lines into a string array?

[javanooby]

Do you want code for reading a file's lines into a string array?

Im not sure, definitly a noob here! From what I understand an Array is kind of like a form of list in Java?. If you have code for that then it may be helpful. Thanks :)

[r035198x]

Im not sure, definitly a noob here! From what I understand an Array is kind of like a form of list in Java?. If you have code for that then it may be helpful. Thanks :)

An array stores many objects of the same type. Their disadvantage is that you have to know the size of the array (number of objects to store) before you start using one. There is another type of array in java.util called ArrayList which does not have this dis advantage. Here is a program which reads contents of a file into an arraylist and then prints all the lines to the screen.

 
import java.util.*;
import java.io.*;
public class Splitting {
public static void main(String[] args) {
ArrayList list = new ArrayList();
try {
FileReader fr = new FileReader("test.txt");
BufferedReader br = new BufferedReader(fr);
String line = "";
while((line = br.readLine()) != null) { //str=str+append;
    list.add(line);
}
}
catch(IOException iO) {
iO.printStackTrace();
}
for(int i = 0; i < list.size();i++) {
 
//Perhaps this is where you want to manipulate the file contents
System.out.println(list.get(i));
}
}
} 

The file test.txt should be in the same folder as the source file for this code. Alternatively you could store it elsewhere and use eg

 FileReader fr = new FileReader("C:\test.txt");
 

[javanooby]

thankyou, that works perfectly, however I still dont understand how I can use data from the text file, say I wanted to add to numbers from the strings together or display just names from the text? i.e this is the text file its reading:

prepaid&123123&Harry Hill&Norwich&3500
contract&246642&Iris Island&London&21-11-1984&1000&15


thanks

[javanooby]

thankyou, that works perfectly, however I still dont understand how I can use data from the text file, say I wanted to add to numbers from the strings together or display just names from the text? i.e this is the text file its reading:

prepaid&123123&Harry Hill&Norwich&3500
contract&246642&Iris Island&London&21-11-1984&1000&15


thanks

sorry ^BUMP^

[r035198x]

sorry ^BUMP^

You did not specify exactly how you want to manipulate the file contents

 
import java.util.*;
import java.io.*;
public class Splitting {
 public static void main(String[] args) {
  ArrayList list = new ArrayList();
  try {
   FileReader fr = new FileReader("test.txt");
   BufferedReader br = new BufferedReader(fr);
   String line = "";
   while((line = br.readLine()) != null) { //str=str+append;
    list.add(line);
   }
  }
  catch(IOException iO) {
   iO.printStackTrace();
  }
  for(int i = 0; i < list.size();i++) {
   //Perhaps this is where you want to manipulate the file contents eg print numbers only
   int a = 0;
    String line = (String)list.get(i);
    String[] tokens = line.split("&");
    for(int j = 0; j < tokens.length; j++) {
     //System.out.println(tokens[j]);
     try {
      a = Integer.parseInt(tokens[j]);
      System.out.println(a);
     }
     catch(NumberFormatException nfE) {
     }
    }
   }
 
 
 }
}