file marger

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

public class FastSnail {

    public void marged() {
        try {
            // TODO add your handling code here:
            BufferedReader br1 = null;
            BufferedReader br2 = null;

            String line1;
            String line2;
            ArrayList<ArrayList<String>> arrayList = new ArrayList<>();

            br1 = new BufferedReader(new FileReader("C:\\Users\\Madhawa.se\\Desktop\\workingfox\\data1.txt"));
            br2 = new BufferedReader(new FileReader("C:\\Users\\Madhawa.se\\Desktop\\workingfox\\data1.txt"));

            while ((line1 = br1.readLine()) != null) {

                String[] split1 = line1.split(",");

                String line1word = split1[0].trim();
                String line1val = split1[1].trim();

                line2 = br2.readLine();

                if (line2 != null) {
                    String[] split2 = line2.trim().split(",");

                    String line2word = split2[0].trim();
                    String line2val = split2[1].trim();

                    ArrayList<String> list = new ArrayList();
                    list.add(line2word);
                    list.add(line2val);
                    arrayList.add(list);

                    if (line1word.equalsIgnoreCase(line2word)) {
                        String ok = line1word + "," + line1val + "," + line2val;
                        System.out.println(ok);
                    }
                } else {
                    String ok = line1word + "," + line1val + "," + doesexist(arrayList, line1word);
                    System.out.println(ok);
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    private String doesexist(ArrayList<ArrayList<String>> arrayList, String s) {
        for (int i = 0; i < arrayList.size(); i++) {
            String get = arrayList.get(i).get(0);
            if (get.trim().equalsIgnoreCase(s.trim())) {
                return arrayList.get(i).get(1);
            }
        }
        return "-1";
    }
    public static void main(String[] args) {
        FastSnail f = new FastSnail();
        f.marged();
    }
}