Java: JSON.simple Parser - convert BufferedReader's readUTF string to Reader

Question

I am writing a server which receives a JSON string then parse it to Java JSONObject, by using the JSON.simple package: https://mkyong.com/java/json-simple-example-read-and-write-json/.

I am using DataInputStream to read input, but when I try to parse the input by writing:

JSONObject json = (JSONObject) parser.parse(input.readUTF());

it says that parse(Java.io.Reader) can not be applied to (Java.lang.String). SO how do I convert the input.readUTF()into the required reader format?

For reference, my code for receiving and parsing the JSON input:

    public class ReceiveThread implements Runnable{
        private DataInputStream input;

        public ReceiveThread(DataInputStream input){
            this.input = input;
        }

        @Override
        public void run() {
            JSONParser parser = new JSONParser();
            while (true){
                String res = null;
                try {
                    if (input.available() > 0){
                        JSONObject json = (JSONObject) parser.parse(input.readUTF());
                        System.out.println("Server response: "+ res);
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                    System.exit(-1);
                }
            }
        }
    }

At the client side, I send the JSON file by:

    public class SendThread implements Runnable{
        private DataOutputStream output;

        public SendThread(DataOutputStream output){
            this.output = output;
        }

        @Override
        public void run() {
            // create json string
            JSONObject json = new JSONObject();
            json.put("key1", 1);
            json.put("key2", "Helloworld");

            try {
                this.output.writeUTF(json.toString());
                this.output.flush();
            } catch (IOException e) {
                e.printStackTrace();
                System.exit(-1);
            }
        }
    }

Thanks in advance! Any bits of help is appreciated.

Yige

Answer 1

It turns out to be the version problem with JSON.simple.

In v1.1, the parse method takes the reader argument, but in version 1.1.1 parse is able to take String arguments.