状态模式的实例

权限。"); } @Override public void checkState(int score) {if (point >= 50) {System.out.println(acc.getName() + "升级到中级会员！");acc.setState(new IntermediateState(acc));}else if(point < 0){System.out.println(acc.getName() + "积分不足，降级为游客！");acc.setState(new GuestState(acc));}}}public class IntermediateState extends AbstractState{public IntermediateState(AbstractState state){this.acc=state.acc;this.point=state.getPoint();this.stateName="中级";}public IntermediateState(ForumAccount acc){this.point=0;this.acc=acc;this.stateName="中级";}public void downloadFile(int score) { System.out.println(acc.getName() + "下载文件，扣除" + score + "积分。"); } @Override public void checkState(int score) {if (point >= 200) {System.out.println(acc.getName() + "升级到高级会员！");acc.setState(new AdvancedState(acc));}else if(point < 50){System.out.println(acc.getName() + "积分不足，降级为新手！");acc.setState(new PrimaryState(acc));}}}public class AdvancedState extends AbstractState{public AdvancedState(AbstractState state){this.acc=state.acc;this.point=state.getPoint();this.stateName="高级";}public Advanced