根据我们校区的情况，解决干饭人在干饭道路上的一些不便，于是我做了一个随机点菜程序。还行，需要的老铁拿走
----------------->>>>不需要的拿走，不喜勿喷<<<<------------------------
随机获取菜名及价格
实现荤素搭配
自定义菜数
超类-文件流输入文件中的菜名装入数组
数组的长度定义为length=1，在读入一行后扩容，当读取到null时，菜名数组在上一次读取时扩容了1个长度，所以在读到null时要缩容；
一个价格数组、一个菜名数组，并且价格与菜名在两个数组中下标是相同的，只要在随机获取菜名的同时，获取菜名下标，根据下标取出价格数组里的价格就能实现菜名和价格；
package ording;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.Random;
import java.util.Scanner;
public abstract class ObjectMenu {
int stNum;
String[] stir = new String[1];
String[] suCai = new String[1];
String[] Cold = new String[1];
String[] Speciality = new String[1];
String[] DryWok = new String[1];
int[] SuP = {18,15,16,16,16,12,12,18,13,16,15,12,18,14,15,15,16,16,15,16};
int[] Meat ={18, 18, 20,18, 22, 30, 38, 18,20, 20, 20, 18, 18, 18, 18, 38, 20, 20, 18, 48, 20, 20, 18, 18, 22, 20, 20, 20,20, 30, 18, 30, 18, 18, 30, 18, 18, 40, 18, 38, 30, 38,};
int[] specialityPrice = {0, 0, 48, 38, 38, 38, 38, 38, 48, 38, 32, 32, 35, 38, 28, 40, 22, 40};
int[] Coldprice = {8, 8, 8, 22, 12, 22, 10, 12, 10, 15};
int[] DryWokPrice = {46, 48, 46, 48, 48, 48, 48, 46, 20, 20, 46, 48};
int[] MenuPrice;
String[] sui;
String name;
public String[] ObjectMenu(String fileName) throws IOException {
FileInputStream fis = new FileInputStream(fileName);
InputStreamReader isr = new InputStreamReader(fis, StandardCharsets.UTF_8);
BufferedReader br = new BufferedReader(isr);
String line;
// if (fileName == "./src/Menu/StirFry.txt") {
// sui = stir;
//
// name = "荤菜";
// }else if (fileName=="./src/Menu/ColdDishes.txt"){
// sui = Cold;
// name ="凉菜";
//
//
// }else if (fileName =="./src/Menu/suCai.txt"){
// sui = suCai;
// name = "素菜";
// }
switch (fileName){
case "./src/Menu/StirFry.txt":
sui = stir;
MenuPrice = Meat;
name = "荤菜";
break;
case "./src/Menu/ColdDishes.txt":
sui = Cold;
MenuPrice = Coldprice;
name ="凉菜";
break;
case "./src/Menu/suCai.txt":
sui = suCai;
MenuPrice = SuP;
name = "素菜";
break;
case "./src/Menu/Speciality.txt":
sui = Speciality;
MenuPrice = specialityPrice;
name = "特色菜";
break;
case "./src/Menu/DryWok.txt":
sui = DryWok;
MenuPrice = DryWokPrice;
name = "干锅";
break;
}
for (int i = 0; i < sui.length; i++) {
if ((line = br.readLine()) != null) {
sui[i] = line;
sui = Arrays.copyOf(sui,sui.length+1);
} else {
sui = Arrays.copyOf(sui,sui.length-1);
break;
}
}
//System.out.println(Arrays.toString(sui));
br.close();
return sui;
}
public void getRandomArray(int stNum){
this.stNum = stNum;
Random rand = new Random();
//随机选取的元素装入数组sf
int[] Price = new int[stNum];
String[] sf = new String[stNum];
int index;
for (int i = 0; i < stNum; i++) {
index = rand.nextInt(sui.length-i);
sf[i] = sui[index];
Price[i] = MenuPrice[index];
for (int j = index; j < sui.length-i-1; j++) {
sui[j] = sui[j+1];
}
}
for (int i = 0; i < sf.length; i++) {
System.out.println(sf[i]+"t"+Price[i]+"元");
}
// for ( String str:sf){
// System.out.println(str+"t"+Price+"元");
// }
}
public int StNum(){
Scanner scanner = new Scanner(System.in);
System.out.println("请输入你要点的" + name+"个数：");
stNum = scanner.nextInt();
return stNum;
}
}
子类-以菜的类型分为5个类，主要获取菜名文件的文件名并返回给fileName方便文件流调用
package ording;
//干锅类
public class DryWok extends ObjectMenu{
public String DryWok(){
String fileName = "./src/Menu/DryWok.txt";
return fileName;
}
}
package ording;
//凉菜类
public class ColdDishes extends ObjectMenu{
public String ColdDishes(){
String fileName = "./src/Menu/ColdDishes.txt";
return fileName;
}
}
package ording;
//特色菜类
public class Speciality extends ObjectMenu{
public String Speciality(){
String fileName = "./src/Menu/Speciality.txt";
return fileName;
}
}
package ording;
//农家小炒类
public class StirFry extends ObjectMenu {
public String SFry(){
String fileName = "./src/Menu/StirFry.txt";
return fileName;
}
}
package ording;
//素菜类
public class Vegetables extends ObjectMenu{
public String Vege(){
String fileName = "./src/Menu/suCai.txt";
return fileName;
}
}
运行结果：
菜单文件-txt文件可以自己定义菜名
