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public class ZombiePlant
{
    private final int maxPotency;
    private int treatmentsNeeded;

    public ZombiePlant(int max, int needed)
    {
        maxPotency = max;
        treatmentsNeeded = needed;
    }

    public int treatmentsNeeded()
    {
        return treatmentsNeeded;
    }

    public void treat(int potency)
    {
        if(potency > maxPotency)
        {
            treatmentsNeeded++;
        }
        else
        {
            if(treatmentsNeeded > 0)
                treatmentsNeeded--;
        }
    }

    public boolean isDangerous()
    {
        return treatmentsNeeded > 0;
    }
}

Additional classes & objects resources

• Constructing objects
• Class writing order
• Primitive types vs references exercises
• Primitive types vs references exercises with calls

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