Reading line from a file, and manipulating individual words from each line?
<p>I am attempting to the read-in a .txt file and create a map to calculate total property listed in dollars and cents for each agent id.  The agent ids are the three digit numbers at the end of each line.   The problem is, i'm not exactly sure how to go about doing this. <br/></p>

<p>I'm thinking i should create a while loop and add each line to an arraylist, and then..... I'm lost.
I'm a REAL beginner here, Thanks in advanced for any help.</p>

<p><code>
110001    commercial       500000.00  101<br>
110223    residential      100000.00  101<br>
110333    land             30000.00   105<br>
110442    farm             200000.00  106<br>
110421    land             40000.00   107<br>
112352    residential      250000.00  110
</code></p>

<p>Ok, I know It has been a long time since i started this thread, but I haven't been able to revisit this problem for weeks now. (I'm attempting to learn this for personal growth, so it hasn't been priority) So far I have come this far...</p>

<p>My method for creating the map is this:</p>

<pre><code>public void createMap()
{
    if(in != null)
    {
        while(in.hasNextLine())
        {
            String s = in.nextLine().trim();
            System.out.print(s);


            String[] p = s.split(" ");

            String agentId = p[3];

            double property = Double.valueOf(p[2]);

            if(!map.containsKey(agentId)){
                //if not then add the new key with new value
                map.put(agentId, property);
                in.nextLine();
            }
            else
            {  //if key is present, add the value..
                map.put(agentId, map.get(agentId) + property);
                in.nextLine();
            }


        }
    }
}
</code></pre>

<p>Then in my program that i am running:
I convert map to a Set and using a enhanced for-loop print each key and value.</p>

<pre><code>Set&lt;String&gt; keySet = examp.map.keySet();
    for (String key : keySet)
    {
        double value = examp.map.get(key);
        System.out.println(key + "-&gt;" + value);
    }
</code></pre>

<p>my output however gives me this: {} "empty brackets"!!!
What am I doing wrong!</p>
