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

stackoverflow.com/questions/3481828/…

Jeroen Steenbeeke
– Jeroen Steenbeeke

2017-11-27 10:36:50 +00:00
Commented Nov 27, 2017 at 10:36 — Jeroen Steenbeeke
– Jeroen Steenbeeke, Commented Nov 27, 2017 at 10:36
Possible duplicate of How to split a string in Java

Jeroen Steenbeeke
– Jeroen Steenbeeke

2017-11-27 10:37:11 +00:00
Commented Nov 27, 2017 at 10:37 — Jeroen Steenbeeke
– Jeroen Steenbeeke, Commented Nov 27, 2017 at 10:37
You must need to put more efforts to get it done,

KhAn SaAb
– KhAn SaAb

2017-11-27 10:46:31 +00:00
Commented Nov 27, 2017 at 10:46 — KhAn SaAb
– KhAn SaAb, Commented Nov 27, 2017 at 10:46
Possible duplicate of Split string by char in java

Yassine Badache
– Yassine Badache

2017-11-27 10:50:55 +00:00
Commented Nov 27, 2017 at 10:50 — Yassine Badache
– Yassine Badache, Commented Nov 27, 2017 at 10:50
You are receiving char Array or String array?

Rahul Gupta
– Rahul Gupta

2017-11-27 12:01:08 +00:00
Commented Nov 27, 2017 at 12:01 — Rahul Gupta
– Rahul Gupta, Commented Nov 27, 2017 at 12:01

ajc · Accepted Answer · 2017-11-29 14:35:58Z

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, 2017 at 14:35

answered Nov 29, 2017 at 14:30

ajc

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1 Comment

Rohit Jain Over a year ago

Thanks this can be one of an answer but this one is Brute force, I am looking for some optimise solution or any library..

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