Java_7.2库存管理

package demo1;

import java.util.ArrayList;

import java.util.Scanner;

public class Demo1 {

	public static void main(String[] args) {

		ArrayList<Goods> array = new ArrayList<Goods>();

		while(true) {			//功能块的选择 一直循环之道用户选择退出

			int num = chooseFunction();    //选择功能

			switch(num) {

			case 1:

				printGoods(array);				//功能1：打印所有商品

				break;

			case 2:								//功能2：添加商品

				addGoods(array);

				break;

			case 3:								//功能3：修改商品

				updateGoods(array);

				break;

			case 4:								//功能4：删除商品

				deleteGoods(array);

				break;

			case 5:								//退出

				return;

			default:							//其他情况

				System.out.println("无此功能");

			}

		}

	}

	//选择功能

	public static int chooseFunction() {

		System.out.println("=========商品库存管理=========");

		System.out.println("1.查看商品");

		System.out.println("2.添加商品");

		System.out.println("3.修改商品");

		System.out.println("4.删除商品");

		System.out.println("5.退出");

		System.out.println("请选择序号：");

		Scanner sc = new Scanner(System.in);

		int index = sc.nextInt();

		return index;

	}

	//功能1：打印所有商品

	public static void printGoods(ArrayList<Goods> array) {

		System.out.println("编号\t品牌\t尺寸\t价格\t数量");

		for (int i = 0; i < array.size(); i++) {

			Goods g = array.get(i);

			System.out.println((i+1)+"\t"+g.brand+"\t"+g.size+"\t"+g.price+"\t"+g.count);

		}

	}

	//功能2：添加商品

	public static void addGoods(ArrayList<Goods> array) {

		Scanner sc = new Scanner(System.in);

		while(true) {

			System.out.println("请输入品牌：");

			String brand = sc.next();

			System.out.println("请输入尺寸：");

			double size = sc.nextDouble();

			System.out.println("请输入价格：");

			double price = sc.nextDouble();

			System.out.println("请输入数量：");

			int count = sc.nextInt();

			Goods g = new Goods();

			g.brand = brand;

			g.size = size;

			g.price = price;

			g.count = count;

			array.add(g);

			System.out.println("添加成功");

			System.out.println("是否继续输入(1为继续输入0为结束输入)");

			int number = sc.nextInt();

			if(number==0)

				return;

		}

	}

	//功能3：修改商品

	public static void updateGoods(ArrayList<Goods> array) {

		Scanner sc = new Scanner(System.in);

		while(true) {

			System.out.println("请输入要修改的商品的序号：");

			int index= sc.nextInt()-1;

			Goods g = array.get(index);

			System.out.println("请输入品牌：");

			String brand = sc.next();

			g.brand = brand;

			System.out.println("请输入尺寸：");

			double size = sc.nextDouble();

			g.size = size;

			System.out.println("请输入价格：");

			double price = sc.nextDouble();

			g.price = price;

			System.out.println("请输入价格：");

			int count = sc.nextInt();

			g.count = count;

			System.out.println("修改成功");

			System.out.println("是否继续输入(1为继续输入0为结束输入)");

			int number = sc.nextInt();

			if(number==0)

				return;

		}

	}

	//功能4：删除商品

	public static void deleteGoods(ArrayList<Goods> array) {

		Scanner sc = new Scanner(System.in);

		System.out.println("请输入要删除的序号：");

		int num = sc.nextInt()-1;

		array.remove(num);

		System.out.println("删除成功");

	}

}