处理对象时如何在java中使用地图 [英] How to use a map in java when dealing with objects

问题描述

所以，我正在创建一个程序，允许用户在保险单中指定他们想要的保险。作为其中的一部分，我需要使用地图来跟踪每个特定保险单的所有者。

So, I'm creating a program that allows users to specify the insurance cover they want as part of an insurance policy. As part of it, I need to use a map in order to track the owner of each specific insurance policy.

我已经看到了如何使用地图的例子至 String 和 int 值，但对于自制课程（ InsurancePolicy 在我的情况下）。

I have seen examples of how to use a map with regards to String and int values, but nothing for self made classes (InsurancePolicy in my case).

所以，我试图这样做，但我得到非法的表达式警告：

So, I'm trying to do it like this, but I get the illegal expression warnings:

Map<String, InsurancePolicy> coverOwnerMap<String, InsurancePolicy>();

任何帮助将不胜感激。

Any help would be very appreciated.

推荐答案

对，这是无效的Java。尝试，

Right, that's invalid Java. Try,

Map<String, InsurancePolicy> coverOwnerMap = new HashMap<String, InsurancePolicy>();

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