第7章案例代码.zip

package nuc.ss.demo.section7_4c; public class Application { public static void main(String[] args) { GeometryBottom bottom = null; try { bottom = BottomCreator.getBottom("circle", 20); } catch (Exception e) { // TODO Auto-generated catch block System.out.println(e.getMessage()); System.exit(-1); } Pillar pillar1 = new Pillar(bottom, 50); System.out.println("半径为" + ((CircleBottom)(pillar1.getBottom())).getRadius() + "的圆形底部、高度为" + pillar1.getHeight() + "的柱体的体积为：" + pillar1.getVolume()); System.out.println("-----------------------"); try { bottom = BottomCreator.getBottom("rectangle", 5, 4); } catch (Exception e) { // TODO Auto-generated catch block System.out.println(e.getMessage()); System.exit(-1); } Pillar pillar2 = new Pillar(bottom, 50); System.out.println("长、宽分别为" + ((RectangleBottom)(pillar2.getBottom())).getA() + "、" + ((RectangleBottom)(pillar2.getBottom())).getB() + "的矩形底部、高度为" + pillar2.getHeight() + "的柱体的体积为：" + pillar2.getVolume()); System.out.println("-----------------------"); try { bottom = BottomCreator.getBottom("triangle", 5, 4, 3); } catch (Exception e) { // TODO Auto-generated catch block System.out.println(e.getMessage()); System.exit(-1); } Pillar pillar3 = new Pillar(bottom, 50); } }