Tagged Questions
3
votes
1answer
72 views
Reading values from a file and assigning to another class
I'm assigning values to an object by passing it to another class. Basically, I'm reading values from a file and assigning it by passing it to another class.
This is the POJO class for the details in ...
3
votes
1answer
52 views
Convert MQTT messages and publish them to Rabbit MQ
I'm looking for advice on how to find a balance between keeping this code flexible/maintainable, while also keeping it readable.
It reads MQTT messages in JSON format from four different topics, ...
3
votes
2answers
118 views
Spring Boot RESTful service
I have developed this restful service using spring boot. Please look at the code if there is something to change to be more consistently.
Resource
...
4
votes
2answers
455 views
3
votes
2answers
142 views
Parse a JSON file in Java
I am using Java to parse a JSON file into a hash map so that i can search by typing a date and then get the cost, tax and profit for that date.
So that if i write:
...
1
vote
0answers
55 views
Filtering listview results when spinner values get selected
I have 3 spinners in my project named standard, division and age. They contain values from json data. When I select a value from each individual spinner it shows all data of students in a listview who ...
-1
votes
1answer
45 views
possible code optimizations while using JSONObject
I have following JSONArray object from a jsonobject key "elements"
...
2
votes
1answer
68 views
Gson to Model containing several return types for one key
i just had a problem converting the JSON from Phillips Hue Lights (Response) to a Model. Since it may contain several "unknown" keys in success and/or may contain just a String for success i had to ...
5
votes
1answer
89 views
Keep parsing JSON response until a field becomes false using GSON
I have JSON which is coming by executing a URL. I want to store all the value of id field in a List<String> by parsing ...
4
votes
0answers
80 views
Dynamically creating login screen on Android devices
This has been an experience. I'm well above "hello world" java is not a language I use often when programming and I don't program too much. I find myself a lot on Google.... basically just about for ...
4
votes
1answer
478 views
Writing CSV file from huge JSON data
I am writing a program that reads from DB and outputs to a CSV file. Besides the regular columnar data there are 2 JSON fields data as well. The table layout looks like this (other fields removed for ...
2
votes
2answers
99 views
Generic data converter for one type of data to another
I wrote a generic data converter that takes one kind of data and converts to JSON and XML types of file. Now, it reads data from the given ...
2
votes
0answers
52 views
2
votes
2answers
106 views
Loading attributes of cars and orders from JSON
I am creating an application that deals with cars and orders.
A order contains a car and other information (BUYER, OWNER, ...), which constructs an orderObject.
...
1
vote
0answers
20 views
Wikipath stack in Java - Part II/IV - The implicit Wikipedia article graph
This question is the continuation of the Wikipath stack series: the two classes that - given a Wikipedia article \$A\$ - return the lists of neighbour articles. The forward node expander return the ...
1
vote
1answer
68 views
Java password encryption based on time and string
I have a program that:
Takes a user specified string
Creates password from the string and previous, current, and next day
Encrypts the strings
Chops some middle characters from the strings (needed to ...
4
votes
2answers
174 views
ToDoApp with persistence (using JSON)
This is a simple ToDoApp with a CLI that is made useful by adding persistence. A shout out to @Phrancis and @syb0rg for guiding this little project to where it is now.
The structure is rather simple. ...
4
votes
1answer
32 views
Invoking API calls with parameters specified using JSON
I have an instance of a Java class that I need to call some functions on, using the API exposed by another party. For each call, I need to both check for thrown exceptions, and check the value of the ...
0
votes
0answers
1k views
Loading autocomplete text view adapter dynamically using async task in Android
I am working on an app in which I need to get destination list from server and set it in autocomplete text view. I am using text watcher and on its onTextChanged event I am fetching destinations data ...
5
votes
2answers
108 views
Tracking Containers in a Train Station
This is a time line for control over the events of some containers in a train station.
It gets all the data to build the time line by getting a JSON from a database via REST service. The app resets ...
2
votes
2answers
114 views
RSS to JSON for insertion into MongoDB
In my code, there is a chain of functions call where the deepest function may throw an exception. I catch and handle it according to the business logic. The problem is that all other functions in the ...
7
votes
1answer
207 views
Parse JSON data of upcoming fixtures of Chelsea FC
This program makes a call to an API (http://api.football-data.org/) and obtains data for fixtures of Chelsea FC for the next 100 days in JSON format. The JSON is parsed into a Java object and then ...
4
votes
2answers
386 views
Tic-Tac-Toe machine learning
I recently started getting into machine learning and I wanted to write a "beginner program" which would learn to play Tic Tac Toe. This code was inspired by a different program I saw, meaning some ...
1
vote
1answer
382 views
Google Maps coordinations JSON to object
I am trying to write a parser from JSON data which I get from Google requesting coordinates of a city, which will create my specified object structure. For parsing, I've written a custom ...
-1
votes
1answer
72 views
Proper Use of Keep Alive For Loop
I'm working to make a thread that monitors a web API to get the latest announcement via JSON. I cannot test this currently, so I'm unsure if anything needs to be changed with this. I've read through ...
4
votes
2answers
557 views
App to list books from JSON data
I recently submitted the code for this for an 2 hour interview but I was rejected.
The app shows book information with a image, title, and author. Each entry has a title but some entries have no ...
3
votes
2answers
6k views
CSV to JSON conversion in Java
Since I've looked far and wide for a good example of this to no avail, I have created my own using the JSONArray and JSONObject ...
7
votes
1answer
116 views
Configuration concept and implementation
I created an API to load, save and read user configuration in my application. I've a Configuration interface which provides the basic methods to read, save and read ...
5
votes
3answers
1k views
Login for desktop application
I am building a login using an API call to a URL that returns JSON data. The login works and is functional but in terms of "correctness" and "professionalism", I am looking to get input from some of ...
1
vote
1answer
39 views
Testing class that transforms JSON into a spreadsheet
I am creating unit tests but the class uses objects that have long JSON. What can I do to improve the readability of this?
In tests, only insert those JSON really needed for the test. The class I ...
4
votes
1answer
116 views
Create Java object from from page content or plain text
My job is to make a specified java objects from web page that contains following text:
Companies:
...
6
votes
1answer
5k views
Java JSON Stringifier with the Nashorn API
I have written a Java JSON stringifier with the Nashorn API. Since this code is slow, I wanted to ask if I can improve it. My target is the highest possible performance to make it an alternative to ...
8
votes
1answer
6k views
Java JSON parsing with the Nashorn API
Some time ago I found a website about the Java Nashorn API which allows you to run JavaScript from Java code. I thought about creating a JSON parser in pure Java (without external libraries) which ...
5
votes
1answer
264 views
Fetch and Save Weather Data as JSON
This is part 2 to Fetch, Parse, and Save JSON. As the code evolved, I wanted to post the program with changes for review again.
The objective of the program is to fetch JSON information from a ...
10
votes
3answers
947 views
Fetch, Parse, and Save JSON
I've written a program in Java that will fetch JSON information from a service through their API and save it. As I'm new to Java, I want my code looking clean as possible and to understand the ...
4
votes
2answers
298 views
Data Persistence
I was wondering if I could get some feedback on the library I created to persist data online.
JitterPushDemo.java
...
15
votes
1answer
898 views
Parsing log files of HearthStone: Loading card data without external libraries for JSON
I'm still working on a parser that can parse log entries from a game called HearthStone, the overall idea is that it will read the log file live when the game is running, parses the log file and show ...
3
votes
1answer
113 views
JSON extraction
Given the code below, is there a better way to essentially create different native objects without changing the native constructor or the nativeList.json file? The only option I can see is adding a <...
3
votes
1answer
4k views
Recursively parsing JSON response using GSON
I have a URL which I am executing it and it is returning the below string as a JSON response. I am using GSON to parse JSON.
In the below JSON, "resourceId" ...
0
votes
1answer
5k views
Serializing big JSON using GSON without loading everything in memory
Here is my JSON in which I have only three reportRecords just for demonstration purpose but in general sometimes we are getting pretty huge JSON, then it doesn't ...
2
votes
1answer
2k views
Filtering JSONArray by Branding & Modelling
I have a small function that takes in a list of JSON objects that has the format below. The function below that wants to see if the brand and model of car passed to it can be matched against the List ...
-5
votes
2answers
2k views
4
votes
2answers
156 views
Serializing data from two URLs in the same object efficiently
This is a follow-up to: Serializing JSON data coming from two URLs in the same object
I have two URLs (urlA and urlB) and they ...
0
votes
1answer
549 views
Android export browser history as JSON
I wrote a simple android app to export the browsers history as JSON, but I do not know if the resulting JSON is a format that the user will easily be able to parse and use.
Is there any way that i ...
6
votes
1answer
1k views
Populate views in Android application
I wrote these classes and I would like to know if this is a correct way. I created a new Project with Blank activity and "Scrollable Tabs + Swipe" as Navigation type.
My main activity:
...
2
votes
1answer
624 views
3
votes
1answer
1k views
Parsing JSON from file in Java [closed]
This is a quick question. I am reading a mass amount of JSON from a variety of text files. The JSONs are tweets, in this format:
...
2
votes
1answer
169 views
Json whitespace formatter
I couldn't quickly find Java code with googling to make serialized Json easier to read (this is a debugging library, obviously implementation code wouldn't use this as it's just more characters). This ...
4
votes
1answer
925 views
Finding potential thread safety issues and race conditions in my multithreading code
I am working on a project in which I have two tables in a different database with different schemas. So that means I have two different connection parameters for those two tables to connect using JDBC-...
1
vote
2answers
2k views
Simple JSON writer
I am working on a way to quickly build JSON strings in Java. To this end, I have created the following two files. Assuming that I do not need to parse JSON strings for Java, is this an efficient ...
