Comparing two hashmaps for equal values and same key sets?

Question

How can I best compare two HashMaps, if I want to find out if none of them contains different keys than the other, and if the values of that keys match each oth

Answer 1

public boolean compareMap(Map map1, Map map2) {

    if (map1 == null || map2 == null)
        return false;

    for (String ch1 : map1.keySet()) {
        if (!map1.get(ch1).equalsIgnoreCase(map2.get(ch1)))
            return false;

    }
    for (String ch2 : map2.keySet()) {
        if (!map2.get(ch2).equalsIgnoreCase(map1.get(ch2)))
            return false;

    }

    return true;
}