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JSci is a set of open source Java packages. The aim is to encapsulate scientific methods/principles in the most natural way possible. As such they should greatly aid the development of scientific based software. It offers: abstract math interfaces, linear algebra (support for various matrix and vector types), statistics (including probability distributions), wavelets, newtonian mechanics, chart/graph components (AWT and Swing), MathML DOM implementation, ... Note: some packages, like javax.comm, for the astro and instruments package aren't listed as dependencies (not available).

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package JSci.maths.statistics;

/**
 *
 * @author Mark
 */
public class DiracDeltaDistribution extends ProbabilityDistribution {
    private final double mean;

    public DiracDeltaDistribution(double mean)
    {
        this.mean = mean;
    }
    public double probability(double X) {
        return (X == mean ? 1.0 : 0.0);
    }

    public double cumulative(double X) {
        return (X < mean ? 0.0 : 1.0);
    }

    public double inverse(double probability) {
        throw new UnsupportedOperationException("Undefined");
    }

}