房屋出租系统的主类
package com.java.HouseRentApp;import com.java.HouseRentApp.houseService;class house { private int id; //编号 private String name; //姓名 private String phone; //年龄 private String address; //地址 private int rent; //房租 private String condition; //状态(已出租，未出租) public house() {} public house(int id,String name,String phone,String address,int rent,String condition) { this.id = id; this.name = name; this.phone = phone; this.address = address; this.rent = rent; this.condition = condition; } public void setId(int id) { this.id = id; } public int getId() { return this.id; } public String getName() { return this.name; } public String getPhone() { return this.phone; } public String getAddress() { return this.address; } public int getRent() { return this.rent; } public String getCondition() { return this.condition; } public void changeInfo(String name,String phone) //更换住户信息 { this.name = name; this.phone = phone; } public void chanRent(int rent) { this.rent = rent; } public void chanCondition(String condition) { this.condition = condition; } public String toString() { return " " + this.id + "tt" + this.name + "tt" + this.phone + "tt" + this.address + "tt" + this.rent + "tt" + this.condition; }}class menu { private boolean loop = true; private char key = ' '; private houseService houses = new houseService(4); //设置数组的大小 public void mainMenu() { do { System.out.println(); System.out.println(" =============房屋出租系统============="); System.out.println("|ttt1 新 增 房 源ttt|"); System.out.println("|ttt2 查 找 房 屋ttt|"); System.out.println("|ttt3 删 除 房 屋 信 息tt|"); System.out.println("|ttt4 修 改 房 屋 信 息tt|"); System.out.println("|ttt5 房 屋 信 息ttt|"); System.out.println("|ttt6 退 出ttt|"); System.out.println(" ==================================="); System.out.println(); System.out.println("请输入你的选择(1-6): "); key = Utilis.readChar(); switch (key) { case '1': System.out.println("ttt [ 当前业务 ]"); System.out.println("ttt1 新 增 房 源"); addHouse(); break; case '2': System.out.println("ttt [ 当前业务 ]"); System.out.println("ttt2 查 找 房 屋"); findHouse(); break; case '3': System.out.println("ttt [ 当前业务 ]"); System.out.println("ttt3 删 除 房 屋 信 息"); deleHouse(); break; case '4': System.out.println("ttt [ 当前业务 ]"); System.out.println("ttt4 修 改 房 屋 信 息"); changeInformationHouse(); break; case '5': System.out.println("ttt [ 当前业务 ]"); System.out.println("ttt5 房 屋 信 息"); listHouse(); break; case '6': System.out.println("ttt6 退 出"); char c = Utilis.readConfirmSelection(); if (c == 'Y') { loop = false; } break; } } while (loop); } //编写listHouse()方法输出房屋信息 public void listHouse() { System.out.println(" =============房屋出租系统============="); System.out.println(" 编号t房主tt电话tt地址ttt月租tt状态(已出租/未" + "未出租)"); house[] houses1 = houses.list(); for (int i = 0; i < houses1.length; i++) { if (houses1[i] != null) { System.out.println(houses1[i]); } } System.out.println(" ===========房屋列表显示完毕==========="); } //编写findHouse()方法查找房屋 分为编号查找、名字查找 public void findHouse() { System.out.println(" =============查找房屋============="); System.out.println("请你选择 1名字查找 2房屋编号查找"); int key = Utilis.readInt(); while(key != 1 && key !=2) { System.out.println("你的输入有误！！"); System.out.println("请你重新输入！！"); key = Utilis.readInt(); } switch (key) { case 1 -> findHouseOfName(); case 2 -> findHouseOfNums(); } } //按照编号查找房屋 public void findHouseOfNums() { System.out.print("请你输入想要查找的房屋的编号:"); int houseId = Utilis.readInt(); if (houses.findHouseNum(houseId)) { System.out.println(" =============查找房屋成功============="); System.out.println(houses.findHouseNumReturn(houseId)); } else { System.out.println(" =============查找失败，编号有误============="); } } //按照姓名查找房屋 public void findHouseOfName() { System.out.println("请你输入想要查找的房屋主人的姓名"); String name = Utilis.readString(8); if(houses.fineHouseName(name)!=null) { System.out.println("现在为你输出信息!!!"); System.out.println(" 编号t房主tt电话tt地址ttt月租tt状态(已出租/未" + "未出租)"); System.out.println(houses.fineHouseName(name)); } else { System.out.println(" =============查找失败，姓名有误============="); } } //编写方法修改房屋信息 public void changeInformationHouse() { System.out.println(" =============修改房屋============="); System.out.print("请你输入修改房屋的编号:"); int nums = Utilis.readInt(); if (houses.findHouseNum(nums)) { System.out.println("请你选择修改 1房客姓名以及联系方式 2月租信息 3出租与否"); int test = Utilis.readInt(); while (test != 1 && test != 2 && test != 3) //判断房客输入的信息是否合法 { System.out.println("输入错误!!"); System.out.println("请你正确输入!!"); test = Utilis.readInt(); } if (test == 1) { System.out.print("[ 姓名 ]: "); String name = Utilis.readString(8); System.out.print("[ 电话 ]: "); String phone = Utilis.readString(8); houses.changeNamePhone(name,phone,nums); } else if(test == 2) { System.out.print("[ 月租 ]: "); int rent = Utilis.readInt(); houses.changeRent(rent,nums); } else { System.out.println("出租与否:"); String condition = Utilis.readString(8); houses.changeCondition(condition,nums); } } else { System.out.println(" =============编号有误，查找失败============="); } } //编写addHouse()方法接受输入创建house对象 public void addHouse() { System.out.println(" =============添加房屋============="); System.out.println("[ 现在进行信息录入...、]"); System.out.println("请你输入房客的姓名，联系方式，月租以及房屋出租与否"); System.out.print("[ 姓名 ]: "); String n1 = Utilis.readString(8); System.out.print("[ 电话 ]: "); String phone1 = Utilis.readString(8); System.out.print("[ 地址 ]: "); String address1 = Utilis.readString(8); System.out.print("[ 月租 ]: "); int rent = Utilis.readInt(); System.out.print("[ 状态 ]: "); String condition = Utilis.readString(3); //注意id是系统分配的，用户不能输入， house information1 = new house(0,n1,phone1,address1,rent,condition); if(houses.add(information1)) { System.out.println(" =============添加房屋成功============="); } else { System.out.println(" =============房屋添加失败============="); } } //编写delHouse() 接收输入的id，调用houseService的del方法 public void deleHouse() { System.out.print("请输入待删除房屋的编号:(-1退出)"); int delId = Utilis.readInt(); if(delId==-1) { System.out.println(" =============放弃删除房屋信息============="); return; } //工具类的方法本身就有循环 char choice = Utilis.readConfirmSelection(); if(choice=='Y') { if (houses.del(delId)) { System.out.println(" =============房屋删除成功============="); } else { System.out.println(" =============编号有误,删除失败============="); } } }}class houseService { private house[] houses; //保存house对象 private int houseNumber=1; //记录当前有多少个房屋信息 private int idCount=1; //记录id的自增值 //可以考虑加入一个数组扩容机制 public houseService(int size) { houses = new house[size]; houses[0] = new house(1,"non","116","海淀区",5000,"已出租"); } //add方法，添加新对象，返回Boolean型 public boolean add(house newHouse) { //判断是否可以继续添加 if(houseNumber == houses.length) { System.out.println("[ 空间已被占满，不能在添加了....、]"); return false; } //把newHouse对象加入到数组中 houses[houseNumber++] = newHouse; //需要设置一个id自增长的程序 newHouse.setId(++idCount); return true; } public house[] list() //设置程序输出房屋信息 { return this.houses; } public boolean del(int id) //设置程序返回房屋信息是否存在,存在返回true确认可以删除 { int index =-1; //要找到要删除的房屋对应的下标 for(int i=0;i
房屋出租系统的工具类
package com.java.HouseRentApp;import java.util.*;public class Utilis { //静态属性。。。 public static Scanner scanner = new Scanner(System.in); public static char readMenuSelection() { char c; for (; ; ) { String str = readKeyBoard(1, false);//包含一个字符的字符串 c = str.charAt(0);//将字符串转换成字符char类型 if (c != '1' && c != '2' && c != '3' && c != '4' && c != '5') { System.out.print("选择错误，请重新输入："); } else break; } return c; } public static char readChar() { String str = readKeyBoard(1, false);//就是一个字符 return str.charAt(0); } public static char readChar(char defaultValue) { String str = readKeyBoard(1, true);//要么是空字符串，要么是一个字符 return (str.length() == 0) ? defaultValue : str.charAt(0); } public static int readInt() { int n; for (; ; ) { String str = readKeyBoard(10, false);//一个整数，长度<=10位 try { n = Integer.parseInt(str);//将字符串转换成整数 break; } catch (NumberFormatException e) { System.out.print("数字输入错误，请重新输入："); } } return n; } public static int readInt(int defaultValue) { int n; for (; ; ) { String str = readKeyBoard(10, true); if (str.equals("")) { return defaultValue; } //异常处理... try { n = Integer.parseInt(str); break; } catch (NumberFormatException e) { System.out.print("数字输入错误，请重新输入："); } } return n; } public static String readString(int limit) { return readKeyBoard(limit, false); } public static String readString(int limit, String defaultValue) { String str = readKeyBoard(limit, true); return str.equals("")? defaultValue : str; } public static char readConfirmSelection() { System.out.println("请输入你的选择(Y/N): 请小心选择"); char c; for (; ; ) {//无限循环 //在这里，将接受到字符，转成了大写字母 //y => Y n=>N String str = readKeyBoard(1, false).toUpperCase(); c = str.charAt(0); if (c == 'Y' || c == 'N') { break; } else { System.out.print("选择错误，请重新输入："); } } return c; } private static String readKeyBoard(int limit, boolean blankReturn) { //定义了字符串 String line = ""; //scanner.hasNextLine() 判断有没有下一行 while (scanner.hasNextLine()) { line = scanner.nextLine();//读取这一行 //如果line.length=0, 即用户没有输入任何内容，直接回车 if (line.length() == 0) { if (blankReturn) return line;//如果blankReturn=true,可以返回空串 else continue; //如果blankReturn=false,不接受空串，必须输入内容 } //如果用户输入的内容大于了 limit，就提示重写输入 //如果用户如的内容 >0 <= limit ,我就接受 if (line.length() < 1 || line.length() > limit) { System.out.print("输入长度（不能大于" + limit + "）错误，请重新输入："); continue; } break; } return line; } public static String scanner() { return scanner.next(); }}