Storing data into an array list and then binary search tree
<p>I have a homework assignment where I need to load patient data into a node, then be able to search through the tree. The node will store patient name, doctors name, their current appointment, and there next annual appointment date. The data is read in from a text file. I want to use an arrayList to store the data into the nodes, but the confusing part is how can I store just the certain data of the arrayList into each node? (I hope that makes sense). I posted a day or so ago and had some help to create a patient class and then store that inside the node and then array list. But I am still lost in exactly how I could implement that. Keep in mind I am horrible at BST's O.o. And I chose to use an arrayList over LinkedList since I am more comfortable using those.
This is my class for reading in my text file...(Array implementation isn't complete).</p>

<pre><code>public class readFile {
    private Scanner x;

    public void openFile() {
        try {
            x = new Scanner(new File("patients.txt"));
        } catch (Exception e){
            System.out.println("Couldn't find file!");
        }
    }

    public void readFile() {

        ArrayList&lt;String&gt; data = new ArrayList&lt;String&gt;();   
        while(x.hasNext()) {
            String PatientName = x.next();
            String DoctorName = x.next();
            String currentApp = x.next();
            String NextApp = x.next();
        }
    }

    public void closeFile(){
        x.close();
    }

}
</code></pre>

<p>And here is my tree class</p>

<pre><code>public class Tree {

    Node root;

    public void addNode(int key, String patientName, String DocName, String currentApp, String nextApp){
        Node newNode = new Node(key, patientName, DocName, currentApp, nextApp);
        if(root == null) {
            root = newNode;
        } else{
            Node currentNode = root;
            Node parent;
            while(true) {
                parent = currentNode;
                if(key &lt; currentNode.key) {
                    currentNode = currentNode.leftChild;
                    if (currentNode == null){
                        parent.leftChild = newNode;
                        return;
                    }
                } else{
                    currentNode = currentNode.rightChild;
                    if (currentNode ==null) {
                        parent.rightChild = newNode;
                        return;
                    }
                }
            }
        }
    }

    public void Traversal(Node currentNode) {
        if(currentNode != null){
            Traversal(currentNode.leftChild);
            System.out.println(currentNode);
            Traversal(currentNode.rightChild);
        }
    }

    public static void main(String[] args){
        Tree binaryTree = new Tree();
        readFile read = new readFile();
        read.openFile();
        read.readFile();
    }
}

class PatientData {
    String patientName;
    String DocName;
    String currentApp;
    String nextApp;

    public PatientData (/*Get parameters*/) {
         /*Set parameters to members*/
    }
}

class Node{
    int key;
    PatientData patient;

    Node leftChild;
    Node rightChild;

    Node(int key, PatientData patient){
        this.key = key;
        this.patient = patient;
    }

}
</code></pre>

<p>This is the text file</p>

<pre><code>Baker, William,     Chavez,     04/01/05,   04/10/06
Sanchez, Jose,      Chavez,     06/15/05,
Anderson, Robert,   Wong,       04/02/05,   03/30/06
Watson, David,      Chavez,     05/03/05,   04/28/06
Chung, Yu,      Gilbert,    07/10/05,
Griffin, Sandy,     Gilbert,    06/20/05,   06/20/06
Marcus, Wendy,      Wong,       08/02/05,   08/03/06
Williams, Rebbeca,  Chavez,     08/10/05,   08/11/06
Kennedy, Fred,      Wong,       07/16/05,   07/15/06
Henderson, Paul,    Wong,       02/15/05,           
Tucker, Matthew,    Wong,       04/10/05,   04/11/06
Coombs, Jean,       Gilbert,    05/01/05,   04/10/06    
Earl, Gary,     Gilbert,    06/03/05,   05/10/06
Atkins, Anthony,    Chavez,     09/10/05,   09/11/06
Garcia, Jesus,      Chavez,     10/10/05,   
David, James,       Wong,       02/02/05,   02/03/06
Young, Ed,      Gilbert,    07/09/05,   07/10/06
Jones, Richard,     Gilbert,    08/01/05,   08/10/06
Peterson, Jerry,    Wong,       06/02/05,   06/03/06
Arnold, Belinda,    Chavez,     01/10/05,   01/11/06
Franklin, Jason,    Wong,       09/12/05,   09/13/06
Trent, Joseph,      Gilbert,    03/12/05,   
Valdez, Tomas,      Gilbert,    10/15/05,   10/10/06
Gent, Charles,      Wong,       10/22/05,   10/11/06
Roper, Joan,        Chavez,     03/10/05,   03/21/06
Lopez, Ricky,       Wong,       03/24/05,   03/25/06
Henry, Sarah,       Gilbert,    04/18/05,   04/17/06
Nathan, James,      Chavez,     06/10/05,   08/11/06
Ulvan, Rachel,      Chavez,     09/10/05,   
Mears, Sally,       Wong,       05/05/05,   
Edwards, Sam,       Gilbert,    05/21/05,   05/22/06
Rubino, Ian,        Gilbert,    07/24/05,   07/21/06
Osborn, Janet,      Chavez,     07/10/05,   07/11/06
Barton, Michael,    Chavez,     10/10/05,   10/16/06
Quinn, Pat,     Gilbert,    08/27/05,   08/29/06
Inglis, Peggy,      Wong,       08/30/05,   08/29/06
</code></pre>

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