问LibGDX:从json文件读取到ArrayList

EN

[
    {
        "name": "Wall",
        "symbol": "#",      
    },
    {
        "name": "Floor",
        "symbol": ".",
    }
]

public class Tile {

    public String name;
    public String symbol;

}

public class Data {

    public static ArrayList<Tile> tilesData;

    public static void loadData() {
        tilesData = new ArrayList<Tile>();
        Json json = new Json();
        json.fromJson(Tile.class, Gdx.files.internal("data/tiles.json"));
    }

}

json.fromJson(Tile.class, Gdx.files.internal("data/tiles.json"));

Exception in thread "LWJGL Application" com.badlogic.gdx.utils.SerializationException: Error reading file: data/tiles.json

Caused by: com.badlogic.gdx.utils.SerializationException: Unable to convert value to required type: [
{
    name: Wall,
    symbol: #
},
{
    name: Floor,
    symbol: .
}