java一些简单的项目

妈的我写的都什么垃圾，(Φ皿Φ)

基础数组扩容，排序，操作

class zhanjie66// 扩容/减少/排序数组

{
    public static void main(String[] args) {
        Scanner myScanner = new Scanner(System.in);
        int shuz[] = { 4, -1, 9, 1000, 233333, 144, 252 };
        char ye = 0;
        System.out.println("当前数组为");
        for (int i = 0; i <= shuz.length - 1; ++i) {
            System.out.print(shuz[i] + " ");
        }
        System.out.println("\n1扩容2缩减3排序");
        ye = myScanner.next().charAt(0);
        if (ye == '1') {
            do {
                System.out.println("要添加多少个数");
                int c = myScanner.nextInt();
                int t = shuz.length - 1;
                int temp[] = new int[shuz.length + c];
                for (int i = 0; i < shuz.length; i++) {
                    temp[i] = shuz[i];
                }
                shuz = temp;
                System.out.println("目前数组扩为" + shuz.length);
                for (int i = 1; i <= c; i++) {
                    System.out.println("要添加的第" + i + "个数");
                    int f = myScanner.nextInt();
                    t += 1;
                    shuz[t] = f;
                }
                System.out.println("当前数组为");
                for (int i = 0; i <= shuz.length - 1; ++i) {
                    System.out.print(shuz[i] + " ");
                }
                System.out.println("\n是否继续扩y/n");
                ye = myScanner.next().charAt(0);
            } while ('y' == ye);
        } else if (ye == '2') {
            do {
                System.out.println("要缩减多少个数");
                int c = myScanner.nextInt();
                if (shuz.length - c <= 0) {
                    System.out.println("当前元素数不足以缩减" + c + "个");
                    break;
                }
                int temp[] = new int[shuz.length - c];
                for (int i = 0; i < shuz.length - c; i++) {
                    temp[i] = shuz[i];
                }
                shuz = temp;
                System.out.println("当前数组为");
                for (int i = 0; i <= shuz.length - 1; ++i) {
                    System.out.print(shuz[i] + " ");
                }
                System.out.println("\n是否继续缩y/n");
                ye = myScanner.next().charAt(0);
            } while (ye == 'y');
        } else if (ye == '3') {
            do {
                System.out.println("由小到大排序");
                int temp = 0;
                for (int i2 = 0; i2 <= shuz.length - 1; i2++) {
                    for (int i = 0; i <= shuz.length - 2; i++) {
                        if (shuz[i] <= shuz[i + 1]) {

                        } else if (shuz[i] > shuz[i + 1]) {
                            temp = shuz[i];
                            shuz[i] = shuz[i + 1];
                            shuz[i + 1] = temp;
                        }
                    }
                }
                System.out.println("当前数组为");
                for (int i = 0; i <= shuz.length - 1; ++i) {
                    System.out.print(shuz[i] + " ");
                }
                System.out.println("\n是否继续y/n");
                ye = myScanner.next().charAt(0);
            } while (ye == 'y');
        }
    }
}

房屋菜单（对象思想）

public class qidong {
public static void main(String[] args) {
Frame aaa=new Frame();
aaa.jmain();
}
}
class House {
private String name;
private int telephone;
private String address;
private double monthlyRent;
private String status;
public House() {
}
public House(String name, int telephone,
String address, double monthlyRent, String status) {
this.name = name;
this.telephone = telephone;
this.address = address;
this.monthlyRent = monthlyRent;
this.status = status;
}
public String toString() {
return "姓名:" + this.name + "\t电话:" + this.telephone + "\n地址:" + this.address
+ "\n月租:" + this.monthlyRent + "\n状态:" + this.status;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getTelephone() {
return telephone;
}
public void setTelephone(int telephone) {
this.telephone = telephone;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public double getMonthlyRent() {
return monthlyRent;
}
public void setMonthlyRent(double monthlyRent) {
this.monthlyRent = monthlyRent;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
}
class Frame {
Scanner myScanner = new Scanner(System.in);
public int select;
public boolean controls = true;
private House[] housingList = new House[0];
public void jmain() {
do {
this.menu();
this.judgmentFrame();
} while (controls);
System.out.println("----------退出系统----------");
}
public void menu() {
System.out.println("----------菜单----------");
System.out.println("\t1.新增房源");
System.out.println("\t2.查找房屋");
System.out.println("\t3.删除房屋");
System.out.println("\t4.修改房屋信息");
System.out.println("\t5.房屋列表");
System.out.println("\t6.退出");
System.out.println("请输入：");
select = myScanner.nextInt();
}
public void judgmentFrame() {
switch (select) {
case 1:
newHousing();
break;
case 2:
findHouse();
break;
case 3:
deleteHouse();
break;
case 4:
modifyInformation();
break;
case 5:
houseList();
break;
case 6:
controls = false;
break;
default:
System.out.println("请输入1-6的值");
break;
}
}
public void newHousing() {
//扩大housingList数组
House[] temp = new House[housingList.length + 1];
for (int i = 0; i < housingList.length; i++) {
temp[i] = housingList[i];
}
housingList = temp;
House aaa = new House();
housingList[housingList.length - 1] = aaa;
//新建一个House对象
System.out.println("----------添加房屋----------");
System.out.println("姓名：");
housingList[housingList.length - 1].setName(myScanner.next());
System.out.println("电话：");
housingList[housingList.length - 1].setTelephone(myScanner.nextInt());
System.out.println("地址：");
housingList[housingList.length - 1].setAddress(myScanner.next());
System.out.println("月租：");
housingList[housingList.length - 1].setMonthlyRent(myScanner.nextDouble());
System.out.println("状态：");
housingList[housingList.length - 1].setStatus(myScanner.next());
System.out.println("----------添加完成----------");
}
public void findHouse() {
System.out.println("----------查找系统----------");
System.out.println("\t1.查找名称");
System.out.println("\t2.查找电话");
System.out.println("\t3.查找地址");
System.out.println("\t4.查找月租");
System.out.println("请输入：");
select = myScanner.nextInt();
int c = -1;
switch (select) {
case 1:
c=-1;
System.out.println("输入名称：");
String fineName=myScanner.next();
for (int i = 0; i <housingList.length; i++) {
if(fineName.equals(housingList[i].getName())){
System.out.println("查找到为列表"+(i+1)+"个");
System.out.println(housingList[i]);
c++;
}
}
if(c==-1){
System.out.println("未找到");
}
break;
case 2:
c=-1;
System.out.println("输入电话：");
int fineTelephone=myScanner.nextInt();
for (int i = 0; i <housingList.length; i++) {
if(fineTelephone==housingList[i].getTelephone()){
System.out.println("查找到为列表"+(i+1)+"个");
System.out.println(housingList[i]);
c++;
}
}
if(c==-1){
System.out.println("未找到");
}
break;
case 3:
c=-1;
System.out.println("输入地址：");
String fineAdd=myScanner.next();
for (int i = 0; i <housingList.length; i++) {
if(fineAdd.equals(housingList[i].getAddress())){
System.out.println("查找到为列表"+(i+1)+"个");
System.out.println(housingList[i]);
c++;
}
}
if(c==-1){
System.out.println("未找到");
}
break;
case 4:
c=-1;
System.out.println("输入月租：");
double fineDDD=myScanner.nextDouble();
for (int i = 0; i <housingList.length; i++) {
if(fineDDD==housingList[i].getMonthlyRent()){
System.out.println("查找到为列表"+(i+1)+"个");
System.out.println(housingList[i]);
c++;
}
}
if(c==-1){
System.out.println("未找到");
}
break;
default:
System.out.println("请输入正确值1-4");
break;
}
}
public void deleteHouse() {
System.out.println("----------删除房屋----------");
System.out.println("输入要删除的房屋编编号");
int deleteId=myScanner.nextInt();
if(deleteId>housingList.length){
System.out.println("编号错误");
return;
}
House[] temp2 = new House[housingList.length -1];
int j=0;
for (int i = 0; i < housingList.length; i++,j++) {
if((i+1)==deleteId){
j--;
}else {
temp2[j] = housingList[i];
}
}
housingList = temp2;
System.out.println("删除完成QwQ");
}
public void modifyInformation() {
System.out.println("----------修改房间信息--------");
System.out.println("输入要修改的房屋编号");
int modifyId=myScanner.nextInt();
if(modifyId>housingList.length){
System.out.println("编号错误");
return;
}
System.out.println("姓名：");
housingList[modifyId-1].setName(myScanner.next());
System.out.println("电话：");
housingList[modifyId-1].setTelephone(myScanner.nextInt());
System.out.println("地址：");
housingList[modifyId-1].setAddress(myScanner.next());
System.out.println("月租：");
housingList[modifyId-1].setMonthlyRent(myScanner.nextDouble());
System.out.println("状态：");
housingList[modifyId-1].setStatus(myScanner.next());
System.out.println("----------更改完成----------");
}
public void houseList() {
System.out.println("----------列表----------");
for (int i = 0; i < housingList.length; i++) {
System.out.println("列表" + (i + 1) + "\n" + housingList[i]);
}
}
}

计算器（不过好绕）

public class wwww {
public static void main(String[] args) {
YNumber three = new Suc(new Suc(new Suc(new Zero())));
YNumber five = new Suc(new Suc(new Suc(new Suc(new Suc(new Zero())))));
FloatSolver solver = new FloatSolver();
YNumber he=new AddOp(three,five);
System.out.println(solver.solve(he));
}
}
interface YNumber {
}
class FloatSolver{
public float solve(YNumber N) {
if (N instanceof AddOp c) {
return solve2(c);
} else if (N instanceof MultiOp c) {
return solve4(c);
} else if (N instanceof MinusOp c) {
return solve3(c);
} else if (N instanceof DivOp c) {
return solve5(c);
} else if (N instanceof LiteralNum c) {
return solve1(c);
}else  if(N instanceof Suc c){
return solve6(c);
}else if(N instanceof Zero c){
return solve7(c);
}
throw new RuntimeException();
}
private float solve1(LiteralNum i){
return (float)i.i;
}
private float solve2(AddOp i){
return solve(i.i)+solve(i.n);
}
private float solve3(MinusOp i){
return solve(i.i)-solve(i.n);
}
private float solve4(MultiOp i){
return solve(i.i)*solve(i.n);
}
private float solve5(DivOp i){
return solve(i.i)/solve(i.n);
}
private float solve6(Suc i){
return solve(i.i)+1;
}
private float solve7(Zero i){
return 0;
}
}
class LiteralNum implements YNumber {
public LiteralNum(int i) {
this.i = i;
}
public final int i;
}
class Zero implements YNumber{
}
class Suc implements YNumber{
public final YNumber i;
public Suc(YNumber i){
this.i=i;
}
}
class AddOp implements YNumber {
public AddOp(YNumber i, YNumber n) {
this.i = i;
this.n = n;
}
public final YNumber i;
public final YNumber n;
}
class MinusOp implements YNumber {
public final YNumber i;
public final YNumber n;
public MinusOp(YNumber i, YNumber n) {
this.i = i;
this.n = n;
}
}
class MultiOp implements YNumber {
public final YNumber i;
public final YNumber n;
public MultiOp(YNumber i, YNumber n) {
this.i = i;
this.n = n;
}
}
class DivOp implements YNumber {
public final YNumber i;
public final YNumber n;
public DivOp(YNumber i, YNumber n) {
this.i = i;
this.n = n;
}
}

零钱通

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;
public class Qishi {
public static void main(String[] args) {
Gong aaa=new Gong();
aaa.menu();
}
}
class Gong {
Scanner sc = new Scanner(System.in);
boolean loop = true;
private static double balance = 0;
private double money = 0;
private String why;
private String[] linqian = new String[0];
Date times = new Date();
SimpleDateFormat timeGes = new SimpleDateFormat("yyyy-MM-dd HH:mm");
String details = "----------零钱明细----------";
public void menu() {
do {
System.out.println("----------菜单----------");
System.out.println("1.零钱明细");
System.out.println("2.收益入账");
System.out.println("3.消费");
System.out.println("4.退出");
System.out.println("请选择（1-4）:");
int key = sc.nextInt();
switch (key) {
case 1:
minxi();
break;
case 2:
shouru();
break;
case 3:
xiaof();
break;
case 4:
System.out.println("退出");
loop = false;
break;
default:
System.out.println("不正确");
}
} while (loop);
System.out.println("----------运行结束----------");
}
public void minxi() {
System.out.println(details);
for (int i = 0; i < linqian.length; i++) {
System.out.println(linqian[i]);
}
}
public void shouru() {
System.out.println("收益入账:");
money = sc.nextDouble();
if (money >= 0) {
balance += money;
String[] Temp = new String[linqian.length + 1];
for (int i = 0; i < linqian.length; i++) {
Temp[i] = linqian[i];
}
linqian = Temp;
linqian[linqian.length - 1] = "收益:"
+ money + "\t时间" + timeGes.format(times) + "\t余额:" + balance;
} else {
System.out.println("输入有误");
}
}
public void xiaof() {
System.out.println("消费原因:");
why = sc.next();
System.out.println("消费金额:");
money = sc.nextDouble();
if (balance > money && money >= 0) {
balance -= money;
String[] Temp2 = new String[linqian.length + 1];
for (int i = 0; i < linqian.length; i++) {
Temp2[i] = linqian[i];
}
linqian = Temp2;
linqian[linqian.length - 1] = "花费:"
+ money + "\t时间" + timeGes.format(times) + "\t余额:" + balance + "\t消费原因:" + why;
} else if (balance <= money) {
System.out.println("喂喂喂，变穷光蛋了");
} else {
System.out.println("输入有误");
}
}
}