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Java Notes

Rainfall Model

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// RainfallStats - Class for keeping the rainfall statistics.
// Fred Swartz - Nov 29, 2005

public class RainfallStats {

    //================================================ instance variables
    private int      _numberOfDataPoints;
    private double   _total;

    //======================================================= constructor
    public RainfallStats() {
        _total = 0.0;
        _numberOfDataPoints = 0;
    }


    //============================================================== add
    // Adds a data point to the rain data.
    public void add(double rain) {
        _total += rain;
        _numberOfDataPoints++;
    }

    //========================================================= getNumber
    // Return number of data points.
    public int getNumber() {
        return _numberOfDataPoints;
    }

    //========================================================= getTotal
    // Returns total rainfall.
    public double getTotal() {
        return _total;
    }

    //======================================================= getAverage
    // Returns average rainfall
    public double getAverage() {
        if (_numberOfDataPoints == 0) {
            return 0.0;
        } else {
            return _total / _numberOfDataPoints;
        }
    }

    //======================================================= clear
    // Get rid of all data.
    public void clear() {
        _total = 0.0;
        _numberOfDataPoints = 0;
    }
}
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