Matrix m = new Matrix(2,3);

        for(int i=0; i<m.getRowDimension(); i++) {

            for(int j=0; j<m.getColumnDimension(); j++) {

                m.set(i, j, Math.random());

                System.out.print(m.get(i, j) + " ");

            }

            System.out.println();

        }

        Matrix t = m.copy();

        Matrix t1 = null;

            t1 = t.transpose();

        t.set(0, 0, 1000000);

        System.out.println(t.get(0, 0) + "  " + m.get(0, 0) + " " + t1+ " " + t + " " + m);

        //输出结果为：1000000.0  0.7540635606803358 Jama.Matrix@486c8255 Jama.Matrix@4be0bf98 Jama.Matrix@1042bb13