Provided Code

public interface NumberGroup
{
    boolean contains(int number);
}

// Write the Range class:
// Range(int min, int max) — stores bounds
// contains(int number) — true if min <= number <= max

// Write the MultipleGroups class:
// MultipleGroups(ArrayList groups) — stores groups
// contains(int number) — true if ANY group contains number

Part A — Range class (4 Points)

Write the Range class that implements NumberGroup. Its constructor takes min and max (inclusive bounds); contains() returns true if number is within the range.

Check Answer Clear

public class Range implements NumberGroup
{
    private int minVal;
    private int maxVal;

    public Range(int min, int max)
    {
        minVal = min;
        maxVal = max;
    }

    public boolean contains(int number)
    {
        return number >= minVal && number <= maxVal;
    }
}

Part B — MultipleGroups class (5 Points)

Write the MultipleGroups class that implements NumberGroup. Its constructor takes an ArrayList of NumberGroup objects; contains() returns true if any group in the list contains the number.

Check Answer Clear

public class MultipleGroups implements NumberGroup
{
    private ArrayList groupList;

    public MultipleGroups(ArrayList groups)
    {
        groupList = groups;
    }

    public boolean contains(int number)
    {
        for (NumberGroup g : groupList)
        {
            if (g.contains(number))
                return true;
        }
        return false;
    }
}

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