find a word in txt and show the line

I'm stuck with this exercise, I have to match the input of an user and a word on a txt file, and that match has to show the whole line, but I don't know how to do it, I have code but I am not sure if it is correct

//codes01.dat

IXE, Mangalore, India

BOM, Mumbai, India

PPP, Proserpine Queensland, Australia

RKT, Ras Al Khaimah, United Arab Emirates

---

Input: ProseRPine

Output: PPP, Proserpine Queensland, Australia

---

   import java.io.*;
import java.util.*;
public class pruebas
{
    public static void main(String[] args) throws java.io.IOException
    {
        System.out.print(" enter airport name");
        Scanner keyboard = new Scanner(System.in);
        String input = keyboard.nextLine();
        BufferedReader br = new BufferedReader(new FileReader("codes01.dat"));
        String s1;
        String s2;
        String strline;
        while (strline = br.readLine())
        {
            s1 = br.readLine();
            int numTokens = 0;
            StringTokenizer st = new StringTokenizer(s1);

            while (st.hasMoreTokens()) {
                s2 = st.nextToken();
                ++numTokens;

                if (s2.equalsIgnoreCase(input)) {
                    System.out.pritn(s1);
                } else {
                    System.out.print(" no data found ");
                }
            }
        }
    }
}