Compare and find out differences between two JSON files

build.gradle

// add the following lines inside the dependencies section of your build.gradle file and sync!

// https://mvnrepository.com/artifact/com.google.code.gson/gson
compile group: 'com.google.code.gson', name: 'gson', version: '2.8.5'
// https://mvnrepository.com/artifact/com.google.guava/guava
compile group: 'com.google.guava', name: 'guava', version: '27.1-jre'

JSONComparer.java

import com.google.common.collect.MapDifference;
import com.google.common.collect.Maps;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import java.io.IOException;
import java.lang.reflect.Type;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Map;

public class JSONComparer {
    private static void compareJSON(String leftJSON, String rightJSON) {
        Gson gson = new Gson();
        Type type = new TypeToken<Map<String, Object>>() {
        }.getType();

        Map<String, Object> leftMap = gson.fromJson(leftJSON, type);
        Map<String, Object> rightMap = gson.fromJson(rightJSON, type);

        MapDifference<String, Object> difference = Maps.difference(leftMap, rightMap);

        System.out.println("Files are " + (difference.areEqual() ? "Identical" : "Distinct"));

        if (!difference.areEqual()) {
            if (difference.entriesOnlyOnLeft().size() > 0) {
                System.out.println("Entries only on the left\n--------------------------");
                difference.entriesOnlyOnLeft().forEach((key, value) -> System.out.println(key + ": " + value));
            }

            if (difference.entriesOnlyOnRight().size() > 0) {
                System.out.println("\n\nEntries only on the right\n--------------------------");
                difference.entriesOnlyOnRight().forEach((key, value) -> System.out.println(key + ": " + value));
            }

            if (difference.entriesDiffering().size() > 0) {
                System.out.println("\n\nEntries differing\n--------------------------");
                difference.entriesDiffering().forEach((key, value) -> System.out.println(key + ": " + value));
            }
        }
    }

    private static String readFile(String path, Charset encoding)
            throws IOException {
        byte[] encoded = Files.readAllBytes(Paths.get(path));
        return new String(encoded, encoding);
    }
}