testrationalmatrix.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。

// TestRationalMatrix.java: Test matrix operations involving
// Rational values
public class TestRationalMatrix
{
  // Main method
  public static void main(String[] args)
  {
    // Declare Rational arrays m1, m2
    Rational[][] m1 = new Rational[4][4];
    Rational[][] m2 = new Rational[4][4];

    // Initialize Rational arrays m1 and m2
    for (int i=0; i<m1.length; i++)
      for (int j=0; j<m1[0].length; j++)
      {
        m1[i][j] = new Rational(i+1,i+3);
        m2[i][j] = new Rational(i+1,i+3);
      }

    // Create RationalMatrix instances
    RationalMatrix rm1 = new RationalMatrix(m1);
    RationalMatrix rm2 = new RationalMatrix(m2);

    // Perform Rational matrix addition, and multiplication
    RationalMatrix rm3 = (RationalMatrix)rm1.addMatrix(rm2);
    RationalMatrix rm4 = (RationalMatrix)rm1.multiplyMatrix(rm2);

    // Display rm1, rm2, rm3, rm4
    System.out.println("m1 + m2 is ...");
    GenericMatrix.printResult(rm1, rm2, rm3, '+');

    System.out.println("\nm1 * m2 is ...");
    GenericMatrix.printResult(rm1, rm2, rm4, '*');
  }
}