Compare two Map for Equal - Java java.util

Java examples for java.util:Map Value

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Description

Compare two Map for Equal

Demo Code

/*//from  www  .j  a va  2  s  .c o m
 Written by Peter O. in 2014.
 Any copyright is dedicated to the Public Domain.
 http://creativecommons.org/publicdomain/zero/1.0/
 If you like this, you should donate to Peter O.
 at: http://upokecenter.dreamhosters.com/articles/donate-now-2/
 */
//package com.book2s;
import java.util.*;

public class Main {
    public static <TKey, TValue> boolean MapEquals(Map<TKey, TValue> mapA,
            Map<TKey, TValue> mapB) {
        if (mapA == null) {
            return mapB == null;
        }
        if (mapB == null) {
            return false;
        }
        if (mapA.size() != mapB.size()) {
            return false;
        }
        for (Map.Entry<TKey, TValue> kvp : mapA.entrySet()) {
            TValue valueB = null;
            boolean hasKey;
            valueB = mapB.get(kvp.getKey());
            hasKey = (valueB == null) ? mapB.containsKey(kvp.getKey())
                    : true;
            if (hasKey) {
                TValue valueA = kvp.getValue();
                if (!(((valueA) == null) ? ((valueB) == null) : (valueA)
                        .equals(valueB))) {
                    return false;
                }
            } else {
                return false;
            }
        }
        return true;
    }
}

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