rationalmatrix.java

此源码为机械工业出版社出版的《Java语言程序设计》第三版所配套的书中所有源代码。

// RationalMatrix.java:
// Declare RationalMatrix derived from GenericMatrix
public class RationalMatrix extends GenericMatrix
{
  // Construct a RationalMatrix for a given Ratonal array
  public RationalMatrix(Rational[][] m1)
  {
    super(m1);
  }

  // Implement the createGenericMatrix method
  public GenericMatrix createGenericMatrix()
  {
    Rational[][] matrix = new Rational[getMatrix().length][getMatrix().length];
    return new RationalMatrix(matrix);
  }

  // Implement the add method for adding two rational elements
  protected Object add(Object o1, Object o2)
  {
    Rational r1 = (Rational)o1;
    Rational r2 = (Rational)o2;
    return r1.add(r2);
  }

  // Implement the multiply method for multiplying
  // two rational elements
  protected Object multiply(Object o1, Object o2)
  {
    Rational r1 = (Rational)o1;
    Rational r2 = (Rational)o2;
    return r1.multiply(r2);
  }

  // Implement the zero method to specify zero for Rational
  protected Object zero()
  {
    return new Rational(0,1);
  }
}