java - 如何检查 Java 中 ArrayList 中是否找到元素？

Question

我有一个 arrayList，我想搜索特定项目并对其执行操作，如下所示:

System.out.print("What is the ID of the shop that you want to delete?");
              int removedShopID= Integer.parseInt(in.next());

       for(int i=0; i<shops.size(); i++){
               if(shops.get(i).getID()==removedShopID)
                { shops.remove(i);
   System.out.println("The shop has been successfully deleted.");}

                         }


}

它工作正常，但我需要添加一条语句，以防没有匹配的 ID，它将打印“未找到”或其他内容。有什么帮助吗？

Answer 1

要显示 khelwood 的含义:

public static void main(String[] args) {

    List<Shop> shops = new LinkedList<Shop>();

    System.out.print("What is the ID of the shop that you want to delete?");
    Scanner scanner = new Scanner(System.in);
    int removedShopID = scanner.nextInt();

    boolean isFound = false;
    for (int i = 0; i < shops.size(); i++) {
        if (shops.get(i).getID() == removedShopID) {
            shops.remove(i);
            isFound = true;
            System.out.println("The shop has been successfully deleted.");
        }
    }
    if (!isFound) {
        System.out.println("Not found!");
    }
}