如何使用Java分割以下字符串？

Question

How do I go about splitting the following string using Java?

{525={174=2, 133=1, 182=1}}

There can be multiple lines similar to above. Each of them is a combination for the outer HashMap. Assuming there is another line

{500={100=2, 150=1, 200=1}}

The desired structure would be

525 -> 174 -> 2
       133 -> 1
       182 -> 1
500 -> 100 -> 2
       150 -> 1
       200 -> 1

I want to have the numbers in a Hashmap>.

Here is what I tried:

String s="{525={174=2, 133=1, 182=1}}";
HashMap<Integer, HashMap<Integer, Integer>> fullMap = new HashMap<Integer, HashMap<Integer, Integer>>();
Integer key, innerKey, innerValue;
key = Integer.parseInt(s.split("=")[0].replace("{",""));

I'm new to Java and don't know how to proceed further.

Answer 1

try this

    String[] a = s.replaceAll("[{}]", "").split("=", 2);
    int key = Integer.parseInt(a[0].trim());
    HashMap<Integer, Integer> innerMap = new HashMap<>();
    for (String e : a[1].split(",")) {
        a = e.split("=");
        innerMap.put(Integer.parseInt(a[0].trim()),  Integer.parseInt(a[1].trim()));
    }
    fullMap.put(key, innerMap);