//Instantiate QuicClient, initialize QUIC configuration. It is recommended to use it as a global variable after creation. For interface details, refer to the API Documentation.
QuicClient quicClient = new QuicClient.Builder()
                        .setCongestionType(QuicClient.CONGESTION_TYPE_BBR) //Utilize BBR congestion algorithm.
                        .setConnectTimeoutMillis(6 * 1000)  //Configure connection timeout.
                        .build();
                        
//Create QuicRequest and specify the request URL.
String url="";
QuicRequest request = new QuicRequest.Builder(url).get().build();

//Execute the request asynchronously and retrieve the result. For usage instructions on QuicCall, refer to the API Documentation.
quicClient.newCall(request).enqueue(new QuicCallback() {
    @Override
    public void onResponse(QuicCall call, QuicResponse response) throws IOException {
         //When the request is executed successfully, it returns the response data.
         ResponseBody body = response.body();
         if(body != null) {
             String res = body.string();
         }
    }
    
    @Override
    public void onFailed(QuicCall call, int errorCode, String error) {
        //When the request fails to be executed, it returns the error message.
    }
});

//Instantiate QuicClient, initialize QUIC configuration. It is recommended to use it as a global variable after creation. For detailed configuration instructions, refer to the API Documentation.
QuicClient quicClient = new QuicClient.Builder()
                        .setCongestionType(QuicClient.CONGESTION_TYPE_BBR) //Utilize BBR congestion algorithm.
                        .setConnectTimeoutMillis(3 * 1000)  //Configure connection timeout.
                        .build();

// Construct body data.
String body="your body string";
RequestBody requestBody = RequestBody.create(MediaType.parse("application/json"), body);

//Create QuicRequest.
String url="";
QuicRequest request = new QuicRequest.Builder(url).post(requestBody).build();

//Execute the request asynchronously and retrieve the result. For usage instructions on QuicCall, refer to the API Documentation.
quicClient.newCall(request).enqueue(new QuicCallback() {
    @Override
    public void onResponse(QuicCall call, QuicResponse response) throws IOException {
         //When the request is executed successfully, it returns the response data.
         ResponseBody body = response.body();
         if(body != null) {
             String res = body.string();
         }
    }
    
    @Override
    public void onFailed(QuicCall call, int errorCode, String error) {
        //When the request fails to be executed, it returns the error message.
    }
});                  

...
//Instantiate QuicCall. For usage details, refer to the API Documentation.
QuicCall quicCall = quicClient.newCall(request);

// Initiate a request.
...

//Cancel the request using the cancel method via QuicCall.
quicCall.cancel();