C4X10_Balloon.java

//Balloon.java      MrG 2011.1020
public class Balloon
{
    private double air;

    /**
    Constructor: initialize the volume
    */
    public Balloon()
    {
        air=0;
    }

    /**
    Accessor: returns volume
    @return the volume
    */
    public double getVolume()
    {
        return air;
    }

    /**
    Mutator: modifies volume
    @param amt is how much you blow
    */
    public void addAir(double amt)
    {
        air=air+amt;
    }

    /**