Comparing two text files in random order with Java

I am trying to compare two text files that are randomized and print out the lines that match in both of the files. File 1:

Student1
Student2
Student3
Student4

File 2:

Student6
Student1
Student2

I want the output as

Student1
Student2

My code is below.

public static void main(String[] args) throws IOException {

     String first = "file1.txt";
     String second = "file2.txt";
     BufferedReader fBr = new BufferedReader(new FileReader(first));
     BufferedReader sBr = new BufferedReader(new FileReader(second));   




     PrintWriter writer = new PrintWriter("test.txt", "UTF-8");  
     while ((first = fBr.readLine()) != null) {
         String partOne1 = fBr.readLine();
         String partTwo1 = sBr.readLine();
         while ((second = sBr.readLine()) != null) {
                System.out.println(first);
                writer.println(first);  
                break;                   

         }
     }


     writer.close();
     fBr.close();
     sBr.close(); 

It's quite simple=) Try to store all results from first file and compare with all lines from second. It will be like this:

package com.company;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;

public class Main {

    public static void main(String[] args) throws IOException {

        String first = "file1.txt";
        String second = "file2.txt";
        BufferedReader fBr = new BufferedReader(new FileReader(first));
        BufferedReader sBr = new BufferedReader(new FileReader(second));

        ArrayList<String> strings = new ArrayList<String>();

        while ((first = fBr.readLine()) != null) {
            strings.add(first);
        }
        fBr.close();

        while ((second = sBr.readLine()) != null) {
            if (strings.contains(second)) {
                System.out.println(second);
            }
        }
        sBr.close();
    }
}

It's better to use memory when possible, your 'while' inside different while can work too long time and obfuskate logic.