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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.tests;

import JSci.io.TextReader;
import JSci.io.TextWriter;
import JSci.maths.matrices.*;
import JSci.util.MatrixToolkit;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.IOException;
import junit.framework.*;

/**
 * Testcase for TextReader/TextWriter.
 * @author Mark
 */
public class TextIOTest extends junit.framework.TestCase {
        public static void main(String arg[]) {
                junit.textui.TestRunner.run(TextIOTest.class);
        }
        public TextIOTest(String name) {
                super(name);
        }

        public void testArray2D() throws IOException {
            double[][] data = {{3.45}, {54.776, 16.045}, {-23.6,2.45,-13.67}};

            StringWriter buf = new StringWriter();
            TextWriter writer = new TextWriter(buf, ',');
            writer.write(data);
            writer.close();

            TextReader reader = new TextReader(new StringReader(buf.toString()));
            double[][] actual = reader.readArray();
            reader.close();

            assertEquals(data, actual);
        }
        public void testMatrix() throws IOException {
            AbstractDoubleMatrix m = MatrixToolkit.randomSquareMatrix(5);

            StringWriter buf = new StringWriter();
            TextWriter writer = new TextWriter(buf, ',');
            writer.write(m);
            writer.close();

            TextReader reader = new TextReader(new StringReader(buf.toString()));
            AbstractDoubleSquareMatrix actual = new DoubleSquareMatrix(m.rows());
            reader.read(actual);
            reader.close();

            assertEquals(m, actual);
        }
        public void testMatrixTable() throws IOException {
            AbstractDoubleMatrix m = MatrixToolkit.wilkinsonMatrix(7);

            StringWriter buf = new StringWriter();
            TextWriter writer = new TextWriter(buf, ',');
            writer.writeTable(m);
            writer.close();

            TextReader reader = new TextReader(new StringReader(buf.toString()));
            AbstractDoubleMatrix actual = new DoubleTridiagonalMatrix(m.rows());
            reader.readTable(actual);
            reader.close();

            assertEquals(m, actual);
        }

        public static void assertEquals(double[][] expected, double[][] actual)
        {
            if(expected.length != actual.length)
                throw new AssertionFailedError("Lengths are not equal");
            for(int i=0; i