How to parse text and build object node

Question

Dear All,
I have a text file as following. I have tried with one node to parse it and store the information. But I can not parse when I have put multiple node. Could you please suggestion me or help on this. How can I store information according node by reading this text file.
Thanks in advance .
AUM
  file1.txt
abattoirs
     TNR: 3786
      BT: buildings
      RT: abattoir workers
      RT: meat byproducts
      RT: meat hygiene
      RT: meat inspection
      RT: meat production
      RT: meatworks effluent
      RT: slaughter
      RT: slaughterhouse waste
      RT: slaughtering equipment
abdomen
     TNR: 3792
      BT: body regions
      NT: umbilicus
      RT: abdominal cavity
      RT: belly
      RT: body cavities
      RT: laparotomy
      RT: peritoneum
abdominal cavity
     TNR: 3793
      BT: body cavities
      RT: abdomen
public class TextParser {
    public static String BT;
    public static String RT;
    public static String NT;
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("C:/file1.txt");
        BufferedReader reader = new BufferedReader(new InputStreamReader(fis, "UTF-8"));
        while (true) {
            String line = reader.readLine().trim();
            if (line.startsWith("BT")) {
                String bt[] = line.split(":");
                System.out.println("BT="  +bt[0]);+
+                System.out.println("Value="+  bt[1]);
            } else if (line.startsWith("RT")) {
                String rt[] = line.split(":");
                System.out.println("RT="  +rt[0]);+
+                System.out.println("Value="+  rt[1]);
            } else if (line.startsWith("NT")) {
                String nt[] = line.split(":");
                System.out.println("NT="  +nt[0]);+
+                System.out.println("Value="+  nt[1]);
            } else {
                System.out.println(" this is system");
}

Answer 1

aum1471 wrote:
My problem is storing this large number txt file. I have started but I do not understand how I can create node after reading this files and store information one basis of
node 1
node 2
so on. .. .Your question is still not entirely clear, but it sounds like you're looking for a Map (if you want to access various nodes by arbitrary names) or an array or ArrayList (if you want random access to nodes by index) or a general List (if you want to access nodes sequentially in the order in which you read them) or Set (if you want only one of each node, and don't care about the order).
Google for java collections tutorial and java arrays tutorial.