Convert HashMap.toString() back to HashMap in Java

Question

I put a key-value pair in a Java HashMap and converted it to a String using the toString() method.

Is it possible to convert t

Answer 1

you cannot do this directly but i did this in a crazy way as below...

The basic idea is that, 1st you need to convert HashMap String into Json then you can deserialize Json using Gson/Genson etc into HashMap again.

@SuppressWarnings("unchecked")
private HashMap toHashMap(String s) {
    HashMap map = null;
    try {
        map = new Genson().deserialize(toJson(s), HashMap.class);
    } catch (TransformationException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return map;
}

private String toJson(String s) {
    s = s.substring(0, s.length()).replace("{", "{\"");
    s = s.substring(0, s.length()).replace("}", "\"}");
    s = s.substring(0, s.length()).replace(", ", "\", \"");
    s = s.substring(0, s.length()).replace("=", "\":\"");
    s = s.substring(0, s.length()).replace("\"[", "[");
    s = s.substring(0, s.length()).replace("]\"", "]");
    s = s.substring(0, s.length()).replace("}\", \"{", "}, {");
    return s;
}

implementation...

HashMap map = new HashMap();
map.put("Name", "Suleman");
map.put("Country", "Pakistan");
String s = map.toString();
HashMap newMap = toHashMap(s);
System.out.println(newMap);