//房间类
public class Room {private String no;//房间号private String type;//房间类型private boolean isuse;//房间是否占用@Overridepublic String toString() {return "Room [no=" + no + ", type=" + type + ", isuse=" + (isuse?"占用":"空闲") + "]";}public Room(String no, String type, boolean isuse) {super();this.no = no;this.type = type;this.isuse = isuse;}public String getNo() {return no;}public void setNo(String no) {this.no = no;}public String getType() {return type;}public void setType(String type) {this.type = type;}public boolean isIsuse() {return isuse;}public void setIsuse(boolean isuse) {this.isuse = isuse;}
}酒店类
public class Hotel {Room[][] rooms;//1.1.2层普通间101-110 201-210//3.3.4单人间//5.标准间Hotel(){rooms = new Room[5][10];for(int i=0;i<rooms.length;i++)for(int j=0;j<rooms[i].length;j++){if(i==0 ||i==1){rooms[i][j]=new Room(((i+1)*100+j+1)+"","普通间",false);}if(i==2||i ==3){rooms[i][j]=new Room(((i+1)*100+j+1)+"","单人间",false);}else{rooms[i][j]=new Room(((i+1)*100+j+1)+"","标准间",false);  }}}//打印房间信息public void print(){for(int i=0;i<rooms.length;i++){for(int j=0;j<rooms[i].length;j++){System.out.print(rooms[i][j] + " ");}System.out.println();}}//提供一个预定房间的方法public void order(String no){for(int i=0;i<rooms.length;i++){for(int j=0;j<rooms[i].length;j++){if(rooms[i][j].getNo().equals(no)){rooms[i][j].setIsuse(true);return ;}}}}//退房public void checkout(String no){for(int i=0;i<rooms.length;i++){for(int j=0;j<rooms[i].length;j++){if(rooms[i][j].getNo().equals(no)){rooms[i][j].setIsuse(false);return ;}}}}
}测试类：
public class Test {public static void main(String[] args){Hotel ht = new Hotel();ht.print();//订房ht.order("301");ht.print();//退房ht.checkout("301");ht.print();}
}