java基础 食品管理系统.docx
java基础 食品管理系统import java.io.BufferedReader;import java.io.InputStreamReader;import java.util.ArrayList;class Foodprivate String label;/标号private String designation;/名称private float price;/价格Food(String label,String designation,float price)/构造方法。初始化this.label=label;this.designation=designation;this.price=price;public String getLabel/六个封装方法return label;public void setLable(String label)this.label=label;public String getDesignationreturn designation;public void setDesignation(String designation)this.designation=designation;public float getPricereturn price;public void setPrice(float price)this.price=price;class FoodManagementprivate ArrayList aa=null;/ArrayList的引用FoodManagement/构造方法aa=new ArrayList;public void addFood(Food food)/添加食品aa.add(food);System.out.println("添加食品成功！");public void FoodQuery(String label)int i;for(i=0;i<aa.size;i+)Food food=(Food)aa.get(i);if(food.getLabel.equals(label)System.out.println("该食品的信息为：");System.out.println("食品编号为："+label);System.out.println("食品名称为："+food.getDesignation);System.out.println("食品价格为："+food.getPrice);break;/只要查询到了就立即退出if(i=aa.size)/食品编号与食品库里没有吻合的就执行这里System.out.println("对不起，无此食品！");public void FoodPriceChange(String label,float price)int i;for(i=0;i<aa.size;i+)Food food=(Food)aa.get(i);if(food.getLabel.equals(label)food.setPrice(price);/修改食品价格 覆盖原来的值System.out.println("修改食品价格成功！");break;if(i=aa.size)System.out.println("对不起，无此食品信息，修改失败！");public void DelFood(String label)int i;if(aa.size=0)System.out.println("对不起，仓库里没有任何食品！");for(i=0;i<aa.size;i+)Food food=(Food)aa.get(i);if(food.getLabel.equals(label)aa.remove(i);System.out.println("删除食品成功！");break;if(i=aa.size)&&(aa.size!=0)System.out.println("对不起，没有该食品！");public class FoodInventoryManagement public static void main(String args) throws Exception FoodManagement shipin=new FoodManagement;BufferedReader KeyboardInput=new BufferedReader(new InputStreamReader(System.in);/(System.in)键盘输入 InputStreamReader输入流while(true)/死循环System.out.println("请按提示选择以下功能：");System.out.println("添加食品请按1");System.out.println("查找食品信息请按2");System.out.println("修改食品价格请按3");System.out.println("删除食品请按4");System.out.println("退出请按0");String str=KeyboardInput.readLine;/读取一行 只能是字符串类型if(str.equals("1")System.out.println("请输入食品编号");String label=KeyboardInput.readLine;System.out.println("请输入食品名称");String designation=KeyboardInput.readLine;System.out.println("请输入食品价格");boolean i=true;while(i)tryfloat price=Float.parseFloat(KeyboardInput.readLine);/字符串类型转化我float类型Food food=new Food(label,designation,price);shipin.addFood(food);/catch(Exception e)System.out.println("价格为整数或小数！");i=true;i=false;else if(str.equals("2")System.out.println("请输入食品编号");String label=KeyboardInput.readLine;shipin.FoodQuery(label);else if(str.equals("3")System.out.println("请输入食品编号");String label=KeyboardInput.readLine;System.out.println("请输入食品新的价格");boolean i=true;while(i)tryfloat price=Float.parseFloat(KeyboardInput.readLine);shipin.FoodPriceChange(label, price);catch(Exception e)System.out.println("价格为整数或小数！");i=true;i=false;else if(str.equals("4")System.out.println("请输入食品编号");String label=KeyboardInput.readLine;shipin.DelFood(label);else if(str.equals("0")System.out.println("感谢您的使用！再见.");System.exit(0);/退出程序elseSystem.out.println("您的输入有误！");System.out.println(".");System.out.println("请您在0到4之间选择");System.out.println(".");
