### 回答1：
以下是一個(gè)簡單的Java商品管理系統(tǒng)代碼示例：
```java
import java.util.Scanner;
public class ProductManagementSystem {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int choice;
boolean quit = false;
Product[] products = new Product[10];
int productCount = 0;
while (!quit) {
System.out.println("1. Add a new product");
System.out.println("2. List all products");
System.out.println("3. Search for a product");
System.out.println("4. Remove a product");
System.out.println("0. Quit");
System.out.print("Enter your choice: ");
choice = scanner.nextInt();
switch (choice) {
case 0:
quit = true;
break;
case 1:
if (productCount < products.length) {
System.out.print("Enter the product name: ");
String name = scanner.next();
System.out.print("Enter the product price: ");
double price = scanner.nextDouble();
Product product = new Product(name, price);
products[productCount] = product;
productCount++;
} else {
System.out.println("Product list is full.");
break;
case 2:
if (productCount == 0) {
System.out.println("No products found.");
} else {
for (int i = 0; i < productCount; i++) {
System.out.println(products[i]);
break;
case 3:
if (productCount == 0) {
System.out.println("No products found.");
} else {
System.out.print("Enter the product name: ");
String name = scanner.next();
boolean found = false;
for (int i = 0; i < productCount; i++) {
if (products[i].getName().equals(name)) {
System.out.println(products[i]);
found = true;
break;
if (!found) {
System.out.println("Product not found.");
break;
case 4:
if (productCount == 0) {
System.out.println("No products found.");
} else {
System.out.print("Enter the product name: ");
String name = scanner.next();
boolean found = false;
for (int i = 0; i < productCount; i++) {
if (products[i].getName().equals(name)) {
for (int j = i; j < productCount - 1; j++) {
products[j] = products[j + 1];
productCount--;
found = true;
break;
if (!found) {
System.out.println("Product not found.");
break;
default:
System.out.println("Invalid choice.");
break;
System.out.println();
class Product {
private String name;
private double price;
public Product(String name, double price) {
this.name = name;
this.price = price;
public String getName() {
return name;
public double getPrice() {
return price;
public String toString() {
return name + ", " + price;
```
該代碼實(shí)現(xiàn)了簡單的商品管理系統(tǒng)，可以添加商品、列出所有商品、搜索商品以及刪除商品。通過Scanner類獲取用戶輸入，使用數(shù)組存儲商品信息。Product類表示商品，有名稱和價(jià)格兩個(gè)屬性，并實(shí)現(xiàn)了toString方法以便于輸出。
### 回答2：
Java實(shí)現(xiàn)商品管理系統(tǒng)代碼需要以下幾個(gè)關(guān)鍵步驟：
1. 設(shè)計(jì)商品類：
class Product {
private String productId;
private String name;
private double price;
// 其他屬性和方法省略
2. 創(chuàng)建商品管理系統(tǒng)類：
import java.util.ArrayList;
import java.util.List;
public class ProductManagementSystem {
private List
productList;
public ProductManagementSystem() {
productList = new ArrayList();
public void addProduct(Product product) {
productList.add(product);
public void removeProduct(Product product) {
productList.remove(product);
public Product getProductById(String productId) {
for (Product product : productList) {
if (product.getProductId().equals(productId)) {
return product;
return null;
// 其他操作方法省略
3. 創(chuàng)建測試類：
public class Test {
public static void main(String[] args) {
ProductManagementSystem system = new ProductManagementSystem();
// 添加商品
Product product1 = new Product("1", "商品1", 10.0);
system.addProduct(product1);
// 刪除商品
system.removeProduct(product1);
// 獲取商品
Product product2 = system.getProductById("2");
if (product2 != null) {
System.out.println(product2.getName());
} else {
System.out.println("商品不存在");
// 其他操作方法測試省略
以上就是使用Java實(shí)現(xiàn)商品管理系統(tǒng)的代碼。商品類用于封裝商品的屬性和方法，商品管理系統(tǒng)類用于對商品進(jìn)行增刪改查等操作，并通過測試類進(jìn)行驗(yàn)證。
### 回答3：
商品管理系統(tǒng)是一個(gè)用于管理商品信息的系統(tǒng)，可以進(jìn)行商品的添加、刪除、修改和查詢等功能。下面是一個(gè)簡單的Java實(shí)現(xiàn)商品管理系統(tǒng)的代碼：
```java
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
class Product {
private String name;
private double price;
public Product(String name, double price) {
this.name = name;
this.price = price;
public String getName() {
return name;
public double getPrice() {
return price;
class ProductManager {
private List
productList;
public ProductManager() {
productList = new ArrayList();
public void addProduct(Product product) {
productList.add(product);
public void removeProduct(Product product) {
productList.remove(product);
public void updateProduct(Product oldProduct, Product newProduct) {
int index = productList.indexOf(oldProduct);
productList.set(index, newProduct);
public List
searchProduct(String keyword) {
List
result = new ArrayList();
for (Product product : productList) {
if (product.getName().contains(keyword)) {
result.add(product);
return result;
public void displayAllProducts() {
for (Product product : productList) {
System.out.println(product.getName() + " - $" + product.getPrice());
public class Main {
public static void main(String[] args) {
ProductManager productManager = new ProductManager();
Scanner scanner = new Scanner(System.in);
while (true) {
System.out.println("請選擇操作：");
System.out.println("1. 添加商品");
System.out.println("2. 刪除商品");
System.out.println("3. 修改商品");
System.out.println("4. 查詢商品");
System.out.println("5. 顯示所有商品");
int choice = Integer.parseInt(scanner.nextLine());
switch (choice) {
case 1:
System.out.println("請輸入商品名稱：");
String name = scanner.nextLine();
System.out.println("請輸入商品價(jià)格：");
double price = Double.parseDouble(scanner.nextLine());
productManager.addProduct(new Product(name, price));
break;
case 2:
System.out.println("請輸入要刪除的商品名稱：");
String deleteName = scanner.nextLine();
List
deleteResult = productManager.searchProduct(deleteName);
if (deleteResult.size() == 0) {
System.out.println("找不到該商品！");
} else {
productManager.removeProduct(deleteResult.get(0));
System.out.println("刪除成功！");
break;
case 3:
System.out.println("請輸入要修改的商品名稱：");
String updateName = scanner.nextLine();
List
updateResult = productManager.searchProduct(updateName);
if (updateResult.size() == 0) {
System.out.println("找不到該商品！");
} else {
System.out.println("請輸入新的商品名稱：");
String newProductName = scanner.nextLine();
System.out.println("請輸入新的商品價(jià)格：");
double newProductPrice = Double.parseDouble(scanner.nextLine());
productManager.updateProduct(updateResult.get(0), new Product(newProductName, newProductPrice));
System.out.println("修改成功！");
break;
case 4:
System.out.println("請輸入要查詢的商品名稱：");
String searchName = scanner.nextLine();
List
searchResult = productManager.searchProduct(searchName);
if (searchResult.size() == 0) {
System.out.println("找不到該商品！");
} else {
System.out.println("查詢結(jié)果：");
for (Product product : searchResult) {
System.out.println(product.getName() + " - $" + product.getPrice());
break;
case 5:
productManager.displayAllProducts();
break;
default:
System.out.println("無效的操作！");
break;
```
以上是一個(gè)簡單的Java實(shí)現(xiàn)的商品管理系統(tǒng)?？梢酝ㄟ^選擇操作的方式，實(shí)現(xiàn)商品的添加、刪除、修改和查詢等功能。
