private void actionRandom( )
{
	int m = Matrix.getNumOfRows(matrix);
	int n = Matrix.getNumOfColumns(matrix);
	for (int i = 0; i < m; ++i)
		for (int j = 0; j < n; ++j)
		{
			matrix[i][j] = Math.random();
			matrixTF[i][j].setText(Double.toString(matrix[i][j]));
		}
	repaint();
}