How to calculate min/max keys of map?

Question

I have an array of elements where each element is of type Map

How to find Minimum and Maximum of Keys of a Map<String,float>

My Code :

Please help.

Answer 1

May be you can use Comparator and you create ascending order value arraylist

public static ArrayList<ObjectA> getObjectAList() {

    ArrayList<ObjectA> objectAList = new ArrayList<>();
    Collections.sort(objectAList, ObjectA.objectAValue);

    return objectAList;
}
public class ObjectA{
/* Comparator for sorting the list by value */
public static Comparator<ObjectA> objectAValue = new Comparator<ObjectA>() {

    @Override
    public int compare(ObjectA object1, ObjectA object2) {

        float value1 = object1.getValue();
        float value2 = object2.getValue();

        /* For ascending order */
        return Float.floatToIntBits(value1)-Float.floatToIntBits(value2);

    }
};

}

Answer 2

I have an array of elements where each element is of type Map

How to find Minimum and Maximum of Keys of a Map<String,float>

My Code :

Please help.