how to read list of name from text file into a binary search tree?

[Javanoobs]

As the title, how to read data from text file and load into a BST? suppose text file have name and phone number which name and phone number is a string, so when function invoked should read data from text file and load into a BST

 public void readDataFile()     // read data from text fiel and load into BST
    {
     String fileName = "phonebook.txt";  // name of thr file
     Scanner fromFile = null;
        try{
            fromFile = new Scanner(new File(fileName));    // read from file phonebook.txt
        }
        catch(FileNotFoundException e)
  {
            System.out.println("Error : " +e);
            System.out.println("Unable to open file " + fileName);
        }
    DataFile tree = new DataFile();
     while (fromFile.hasNextLine())
     {
         String line = fromFile.nextLine();   // reads each line from the text file and stores it in line.
         tree.add(line);    // please help me this part
         
     }
     fromFile.close();
 }

having problem with this,

tree.add(line)

is the "add" suppose a function? or have any standard library command to replace it?

[Javanoobs]

am i posting on the wrong section? or no one seems to know how to correct it?

[jojo]

this should help you, i guess you don't understand what a binary search tree is?

Java binary tree code