Replace String in the file

Question

First of all hi all.:)
Well I'm trying to write a program that writes to the filename "database.txt" and read as well, but the problem is my file look like this below.
1 Red 03/08/2004 Imessa 457 false
The first character is the ID after colour and so on. So my question is how can I replace the colour name without affecting the others strings. I just want to replace the colour name. I have heard about the Random AccessFile but not sure how that works.I know that using RandomAccessFile, it is possible that it finds the position of the string i want to delete, and overwrite it with something.another string.
Thanks and much appreciate any help :)

Answer 1

I actually did on a different way, I could not change one specific item in the string of arrays. So I created a database.txt for loading and saving purposes. The program executes and the first thing it does is to load the file named database.txt, after have read it, it takes all the data and put into a string of arrays, the only way that I found to change it, is any specific item on a specific point is divide it by spaces like a counter - 1 or + 1.
take a look below and see how I coded it.
/** It adds the new car to the filename (Database.txt). */     
private void storethecarinthedatabase()
readthefile(); /** here it reads the file database.txt and gets the data inside it and put in an array.
if(s7 == null && id != 0){
System.out.println("The car was added successful to the database.");
writethefile();}
else if(s7 == null && id == 0){
System.out.println("The car was not added, because the number 0 can not be a registration number.");}
else {
Boolean iszero = false;
Boolean idfound = false;
String id1 = "" + id;
for(int i =0;i < s7.length;i = i+6) /** here it jumps + 6 places dividing the arrays by its attributes.*/
if(id1.equals(s7)){  
idfound = true; }
else{ 
idfound = false; }
if(id == 0 && idfound == false){
iszero = true;}
else{
iszero = false;}
if(idfound == true){ 
System.out.println("The car was not added because this registration number is in use.");}
else if(iszero == false){
System.out.println("The car was added successful to the database.");
writethefile();} /** here it writes the database.txt with the new data and save into it and the cicle starts again when required */
else{
System.out.println("The car was not added, because the number 0 can not be a registration number.");
I hope this helps and feel free to ask for any help. I will be very happy to do so.
Ricardo.
Edited by: 7runks on Oct 24, 2007 3:15 AM
Edited by: 7runks on Oct 24, 2007 3:16 AM