Skip to main content

Libgdx: Create Item Database using JSON files

This blog post describes how to create an Item database using libgdx JSON parser and storing it in a Collections object to retrieve from.

0.) Create the JSON file

Save this as "weaponDb.json". This JSON object is used to create a list of Items in which we can grab items from.
        "id": 1,
        "name": "Dumb Basic Sword",
        "id": 2,
        "name": "Bad Ass Flaming Sword",
        "id": 3,
        "name": "Sword of Kick Ass",

1.) Create the test

A simple JUnit test to test our database
import com.mygdx.items.Item;
import com.mygdx.items.ItemLoader;
import org.junit.Test;

import java.util.ArrayList;

/*Simple Test Case*/
public class TestDb {

    public void testDb() throws IOException {
        ItemLoader itemLoader = new ItemLoader();
        ArrayList database = itemLoader.load("weaponDb.json");
        for (Item item : database) {
            assert item.getName != null;

2.) Create the ItemLoader

This class converts JSON objects to Java objects.
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.utils.Json;
import com.badlogic.gdx.utils.JsonWriter;

import java.util.ArrayList;

public class ItemLoader {

    public ArrayList load(String db) {
        //Persist JSON object in a Collection, in my case an ArrayList
        ArrayList itemArrayList = new ArrayList();
        //Setup JSON requirements
        Json json = new Json();

        //Convert each JSON obj to an Weapon obj
        for (Object obj : json.fromJson(ArrayList.class, Weapon.class, new FileHandle(db))) {
            itemArrayList.add((Weapon) obj);

        return itemArrayList;

3.) Creating the Item Interface

The Item interface allows a player to equip different types of items that implements the Item interface. Can be armor, weapons, or accessories.
public interface Item {
    public int getId();
    public String getName();

4.) Create the Weapon class

This weapon class extends the Item interface. If you want to create a Armor Object just implement the Item interface when creating you armor database.
public class Weapon implements Item {

    private int id;
    private String name;
    public int getId() {
        return id;

    public String getName() {
        return name;


Popular posts from this blog

Inkscape Game Character #4

This one goes to the fellows a PopCap Games. This is a plant pod from the game Plants vs Zombies.
If you would like to study the drawing feel free to download the Inkscape SVG file.
Right click then hit save link as: plantpod.svg

All rights reserve to the original artists.

Inkscape: Kawaii Friends

Did this one for work.
Download svg file here: kawaii_friends