Question

我想将HashMaps存储在一个数组中。我正在尝试只创建一个HashMap，用特定信息填充它并将其存储到数组的一个元素中。然后我想用不同的信息覆盖该Hashmap中的信息，然后将其存储到该数组的不同元素中。我想多次这样做。这样做的最佳方式是什么？

现在我有：

HashMap[][] location = new HashMap[columns][rows];
HashMap <String, String> area = new HashMap <String, String> ();

public Map() {

    area.put("description", "You are in the upper left\n");
    location[0][0] = area;

    area.put("description", "You are in the upper middle\n");
    location[1][0] = area;
}

问题在于现在位置[0] [0]和位置[1] [0]具有相同的描述。

Answer 1

location [0] [0]和location [1] [0]持有相同的区域指针

你应该这样做

location[0][0] = createArea("You are in the upper left\n");
location[1][0] = createArea("You are in the upper middle\n");



HashMap <String, String> createArea(String desc){
    HashMap <String, String> area = new HashMap <String, String> ();
    area.put("description", desc);
    return area;
}

Answer 2

您需要创建要存储在每个位置的Map的其他实例。

 public Map() {      

   Map<String, String> area = new HashMap<String, String>();
   area.put("description", "You are in the upper left\n");     
   location[0][0] = area;      

   area = new HashMap<String, String>();
   area.put("description", "You are in the upper middle\n");    
   location[1][0] = area; }

将hashMap存储在数组中

2 个答案: