Search for record in txt and print to console

Question

QairNo: 21, PostCd: 12, Age: 21, Gender: 2, Q1Res: 1, Q2Res: 2, Q3Res: 3,
QairNo: 23, PostCd: 21, Age: 12, Gender: 2, Q1Res: 1, Q2Res: 2, Q3Res: 3,
QairNo: 32, PostCd: 32, Age: 12, Gender: 1, Q1Res: 2, Q2Res: 1, Q3Res: 2, Hi i manage to write the above entry into database.txt
now i need to search and print the particular data i need. For example i enter *21* and it will print all the attribute that belong to it.
Please forgive me i am new to this, i have google for example but i can`t apply them for some reason. Below are my code, thank you for helping out !
public class PollSummary {
     public static void main (String args[]) throws IOException {
          //int inputQuestionNum= 0;
          String key = "QairNo: ";
          Scanner input = new Scanner(new FileReader("polldata.txt"));
          while(input.hasNextLine()){
               System.out.println(input.nextLine());
          //System.out.println("Enter the Questionnaire Number to view records");
          //inputQuestionNum = Integer.parseInt(entry.nextLine());
           while (input.hasNext() && input.findInLine(key) != null)
                 String fileLine = input.nextLine();
                 System.out.println(fileLine);
     }//end main
}//end class

Answer 1

You should use a map, just use the QuairNo as a key (aside: what is a Quair?)
http://java.sun.com/docs/books/tutorial/collections/interfaces/map.html