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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.groups;

/**
* Superclass for finite groups.
* @version 1.0
* @author Mark Hale
*/
public abstract class FiniteGroup implements Group {
        protected final int order;

        /**
        * Constructs a finite group.
        * @param n the order of the group
        */
        public FiniteGroup(int n) {
                order = n;
        }
        /**
        * Returns the elements of this group.
        */
        public abstract Group.Member[] getElements();
        /**
        * Returns the order (the number of group elements) of this group.
        * @jsci.planetmath OrderGroup
        */
        public final int order() {
                return order;
        }
}