Solved Array Problems

Hey Guys, I'm having troubles with using Arrays.
Basicly, I need to add Data into the Array, but I don't know how many data there is, so I can't set it to a fix size.
Currently it's looking like this:

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Code:java

public static String[] getGroups(String playername) {
        checkFile();
        try {
            reader = new FileReader(file);
            BufferedReader br = new BufferedReader(reader);
            String read;
            String[] output = null;
            while ((read = br.readLine()) != null) {
                String[] data = read.split(",");
                for (int i=0; i < data.length; i++) {
                    if (data[i].equalsIgnoreCase(playername)) {
                        output[output.length] = data[0];
                    }
                }
            }
            br.close();
            reader.close();
            return output;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }[/i]

Can someone help me? I'm realy having troubles with this simple thing, but I've never needed it before, so hopefully someone can help me.

Thanks in advance.

 

PreFiXAUT
For these kinds of tasks, Java has dynamically expanding lists. You could use a simple ArrayList<Object> to do what you need, and then it also has a toArray method to turn the list to an array if you need to.

 

PreFiXAUT
I would just use an ArrayList.

Code:java

 
ArrayList<String> output = new ArrayList();
output.add("TestString");
output.add("MoreStrings");
//Getting the size
output.size();
//Getting data
output.get(0);
 

 

alex123099 , hexaan
Thanks, totaly forgot about it