TextComparator

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.concurrent.atomic.AtomicReference;

public class Registers {
    public static void main(String[] args) throws IOException {
        Scanner scanner = new Scanner(System.in);

        BufferedReader reader1 = new BufferedReader(new FileReader("C:\\Users\\SINKOPA\\Desktop\\5.txt"));
        BufferedReader reader2 = new BufferedReader(new FileReader("C:\\Users\\SINKOPA\\Desktop\\6.txt"));

        Map<String, Map<String, String>> file1 = new LinkedHashMap<>();
        Map<String, Map<String, String>> file2 = new LinkedHashMap<>();

        String line1 = reader1.readLine();
        String line2 = reader2.readLine();

        String originalKey = "";

        while (line1 != null) {
            String mainKey = "";
            String attribute = "";
            String value = "";
            if (line1.startsWith("[")) {
                mainKey = line1;
                originalKey = mainKey;
                file1.put(originalKey, new LinkedHashMap<>());
            }
            if (line1.contains("=")) {
                attribute = line1.substring(0, line1.indexOf('='));
                value = line1.substring(line1.indexOf('=') + 1);
                file1.get(originalKey).put(attribute, value);

            }

            line1 = reader1.readLine();
        }

        String originalKey2 = "";
        while (line2 != null) {
            String mainKey = "";
            String attribute = "";
            String value = "";
            if (line2.startsWith("[")) {
                mainKey = line2;
                originalKey2 = mainKey;
                file2.put(originalKey2, new LinkedHashMap<>());
            }
            if (line2.startsWith("\"") || line2.startsWith("@")) {
                attribute = line2.substring(0, line2.indexOf('='));
                value = line2.substring(line2.indexOf('=') + 1);
                file2.get(originalKey2
                ).put(attribute, value);

            }

            line2 = reader2.readLine();
        }

        while (file1.size() > 0 || file2.size() > 0) {
            String keyFileOne = "";
            String attributeFileOne = "";
            String valueFileOne = "";

            String keyFileTwo = "";
            String attributeFileTwo = "";
            String valueFileTwo = "";
            for (Map.Entry<String, Map<String, String>> kvp : file1.entrySet()) {
                keyFileOne = kvp.getKey();
                //System.out.println(keyFileOne);
                if (file1.get(kvp.getKey()).size() > 0) {
                    for (Map.Entry<String, String> entry : kvp.getValue().entrySet()) {
                        String a = entry.getKey();
                        String v = entry.getValue();
                        attributeFileOne = a;
                        valueFileOne = v;
                        //System.out.println(attributeFileOne.get() + "=" + valueFileOne.get());
                    }
                }
                file1.remove(kvp.getKey());
                break;
            }
            for (Map.Entry<String, Map<String, String>> kvp1 : file2.entrySet()) {
                keyFileTwo = kvp1.getKey();
                //System.out.println(keyFileTwo);
                if (file2.get(kvp1.getKey()).size() > 0) {
                    for (Map.Entry<String, String> entry : kvp1.getValue().entrySet()) {
                        String a = entry.getKey();
                        String v = entry.getValue();
                        attributeFileTwo = a;
                        valueFileTwo = v;
                        //System.out.println(attributeFileTwo.get() + "=" + valueFileTwo.get());
                    }
                }
                file2.remove(kvp1.getKey());
                break;
            }
            //do ovde radi
            if (!keyFileOne.equalsIgnoreCase(keyFileTwo) || !attributeFileOne.equalsIgnoreCase(attributeFileTwo) || !valueFileOne.equalsIgnoreCase(valueFileTwo)) {
                System.out.println(keyFileOne);
                System.out.println(attributeFileOne + "=" + valueFileOne + "  |||  " + attributeFileTwo + "=" + valueFileTwo);
                System.out.println();
            }
        }
    }
}