How to extract Key Value from String(Char Array) in JAVA

Question

Sorry if some one ask this question earlier but I am unable to find relatively.

My query is

String like this -> {"value":123,"key":abc};

Change into =>

String str = ['"','v','a','l','u','e',':','1','2','3',',','k','e','y',':','a','b','c','"']; // char array

str[0] will be " , str[1] will be v

So I want to know whether it is possible if i want to fetch value by this. let's say

str.getString("value") = 123  <- output expecting

things i tried:

1. JSONObject newStr = (JSONObject)JsonSerializer.toJSON(str);
2. Str.contains("key")
3. JSONObject newStr = new JSONObject(str);

but nothing work for me. Can any one help me with that.

Is there any way so that i can get this answer like this.

str.get("value") = 123 and str.get("key") = abc

https://stackoverflow.com/questions/3481828/how-to-split-a-string-in-java — Jeroen Steenbeeke, Nov 27 '17 at 10:36
Possible duplicate of [How to split a string in Java](https://stackoverflow.com/questions/3481828/how-to-split-a-string-in-java) — Jeroen Steenbeeke, Nov 27 '17 at 10:37
Possible duplicate of [Split string by char in java](https://stackoverflow.com/questions/5296445/split-string-by-char-in-java) — Yassine Badache, Nov 27 '17 at 10:50

ajc · Answer 1 · 2017-11-29T14:35:58.030

2

Maybe updating the first and last element in the char array with { and } respectively.

Constructing a String from it.

Parsing it in a JSONObject and then you can fetch what you want.

Sample code:

        Character[] str = {'{', 'v','a','l','u','e',':','1','2','3',',','k','e','y',':','a','b','c','}'};
        StringBuilder sb = new StringBuilder(str.length);
        for (Character c : str)
            sb.append(c.charValue());
        String strb = sb.toString();

        JSONObject obj = new JSONObject(strb);

        System.out.print(obj.get("value"));

Output

123

edited Nov 29 '17 at 14:35

answered Nov 29 '17 at 14:30

ajc

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Thanks this can be one of an answer but this one is Brute force, I am looking for some optimise solution or any library.. – Rohit Jain Nov 29 '17 at 14:46

How to extract Key Value from String(Char Array) in JAVA

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